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Divided Loyalties: Military Recruitment And Emancipation In Kentucky, Jacob Joseph Klinger Jan 2026

Divided Loyalties: Military Recruitment And Emancipation In Kentucky, Jacob Joseph Klinger

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation explores how Unionist Kentuckians leveraged their military recruitment to negotiate the scope of federal emancipation during the American Civil War. By 1863, the War Department’s need for troops superseded the racial sensitivities of inhabitants in loyal slave states like Kentucky by promising to free and enlist Black men if white recruits failed to fill the quota. Kentucky’s proslavery Unionists responded and white volunteerism surged by 23 percent, 10 percent more than the national average, to fill the quota and negate military emancipation. Kentucky leaders heralded the recruiting effort but struggled to sustain it alongside an uncredited militia which …


Assessing Flood Resilience In West Virginia Communities: Integrating Physical, Institutional, Socioeconomic, And Environmental Dimensions, Anahita Mahmoudi Jan 2026

Assessing Flood Resilience In West Virginia Communities: Integrating Physical, Institutional, Socioeconomic, And Environmental Dimensions, Anahita Mahmoudi

Graduate Theses, Dissertations, and Problem Reports (ETD)

Flooding is one of the most frequent and damaging natural hazards in the United States, with impacts expected to intensify under changing climate conditions. In regions such as West Virginia, complex terrain, development patterns along river corridors, and socioeconomic disparities contribute to elevated flood risk. Traditional approaches to flood risk assessment often focus on single dimensions of vulnerability or rely on binary floodplain maps, which do not fully capture the spatial variability and multidimensional nature of flood resilience.

This dissertation develops an integrated, community-scale framework for assessing flood resilience in West Virginia by combining physical, environmental, institutional, and socioeconomic dimensions …


The Differential Impacts Of Internal And External Corporate Social Responsibility Activities On Consumer Trust After Covid-19, Kennadi C. Mccoy Jan 2026

The Differential Impacts Of Internal And External Corporate Social Responsibility Activities On Consumer Trust After Covid-19, Kennadi C. Mccoy

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation explores the strategic role of Corporate Social Responsibility (CSR) in helping small businesses recover from crises, with a specific focus on the COVID-19 pandemic. Different from many traditional studies that highlight the ethical or reputational aspects of CSR, this research will examine its practical effects: how CSR initiatives during crises influence business success by enhancing consumer trust, particularly by examining the differential impact of Internal CSR versus External CSR. The study suggests that, compared with internally focused CSR, external CSR activities will have a greater impact on consumer trust. In addition, the dissertation suggests that this effect is …


The Impact Of Ai Service Workers On Opportunistic Complaint Behavior, Chelsi J. Baker Jan 2026

The Impact Of Ai Service Workers On Opportunistic Complaint Behavior, Chelsi J. Baker

Graduate Theses, Dissertations, and Problem Reports (ETD)

Consumer complaint behavior research has traditionally focused on interactions between customers and human employees, leaving open questions about how these behaviors may change when the service agent is artificial intelligence. This research looks at whether customers are more likely to engage in opportunistic complaint behavior when interacting with AI service agents and explores what might explain that behavior. The results show that customers are more likely to behave opportunistically when interacting with AI service agents than with human employees. Perceived morality helps explain this relationship, as more human-like service agents increase the extent to which exaggerating a complaint is seen …


A Scalable Distillation And Metric-Learning Pipeline For Adaptive Weed Classification On Edge Devices, Abderrezak Allalen, Omar El-Gayar Jan 2026

A Scalable Distillation And Metric-Learning Pipeline For Adaptive Weed Classification On Edge Devices, Abderrezak Allalen, Omar El-Gayar

Research & Publications

Smart agriculture increasingly relies on automated weed detection to reduce inputs and labor. Deploying deep learning on edge devices is difficult due to limited compute and evolving weed classes. We propose a pipeline that combines partial fine-tuning of an EfficientNet-B7 teacher, embedding level distillation into lightweight students (MobileNetV3, ShuffleNetV2, EfficientNet-B0), and semi-hard triplet metric learning. The system learns 2048D embeddings and is evaluated with N-way/K-shot episodes to mimic a few-label condition. Dynamic INT8 quantization enables CPU-only inference with minimal accuracy loss. The approach adapts rapidly to novel species with few labels while meeting real-time edge constraints, supporting sustainable herbicide management …


Genai–Supported Python Programming Education: A Design Science Research Approach, Sunny Sun, Omar El-Gayar Jan 2026

Genai–Supported Python Programming Education: A Design Science Research Approach, Sunny Sun, Omar El-Gayar

Research & Publications

The growing use of GenAI tools in programming education raises concerns about student over-reliance and the potential adverse impact on the development of foundational skills. This research-in-progress adopts a Design Science Research (DSR) approach to propose the GRE Model, a pedagogical artifact for Python programming education. The model structures learning into seven modules aligned with Bloom’s Taxonomy and integrates AI-supported guidance, reflective practice, and evaluation. The paper contributes a design-oriented framework that supports the responsible integration of GenAI while promoting critical thinking, engagement, and core programming competencies.


Agentic Ai As A System Within Systems: A Process Model Of Organizational Embedding., Aravindh Sekar, Deb Tech Jan 2026

Agentic Ai As A System Within Systems: A Process Model Of Organizational Embedding., Aravindh Sekar, Deb Tech

Research & Publications

The emergence of Agentic AI systems is reshaping organizational processes through continuous adaptation, autonomous coordination, and real-time operational execution. Unlike traditional artificial intelligence applications focused on discrete decision-making tasks, Agentic AI systems operate continuously and interact dynamically with organizational environments. Existing AI ethics literature has primarily emphasized issues such as fairness, bias, transparency, and accountability within static or decision-centric AI contexts. Similarly, traditional AI alignment research has largely focused on ensuring that AI systems pursue intended goals and remain controllable under specified operational conditions. However, these approaches may be insufficient for explaining how ethical risks evolve with continuously operating autonomous …


Exploring Shared Experiences As Citizen Sport Diplomats: A Collaborative Self-Ethnography, Randall J. Griffiths, Jacob K. Tingle, Angela Breidenstein Jan 2026

Exploring Shared Experiences As Citizen Sport Diplomats: A Collaborative Self-Ethnography, Randall J. Griffiths, Jacob K. Tingle, Angela Breidenstein

School of Business Faculty Research

Research purpose: This study was a critical analysis of the lived experiences of three American university professors who served as volunteer citizen diplomats in a bi-lateral U.S. State Department sport exchange program with North Macedonian volleyball coaches.

Research methods: With the aim of capturing the experience of serving as citizen sport diplomats and making sense of it to inform future practice, this research utilized a collaborative self-ethnography approach. This reflexive approach brings together: (a) analytic autoethnography as individuals themselves are engaged in the ethnography and study, and (b) collective ethnography as a team collects and makes sense of shared data …


Genocide And Politicide: The Psychology Of State Terrorism, Clark Mccauley Jan 2026

Genocide And Politicide: The Psychology Of State Terrorism, Clark Mccauley

Psychology Faculty Research and Scholarship

This chapter reviews the psychologies that enable mass killing of civilians by government (politicide). A typology of perceived threats is advanced, with special attention to contamination threat and essentializing the enemy. Three groups of actors are distinguished: perpetrators, leaders, and the mass public that leaders and actors claim to represent. Predictors of genocide are considered, highlighting the importance of means and opportunity.


Two-Pyramids Model Of Radicalization To Terrorism, Clark Mccauley, Sophia Moskalenko Jan 2026

Two-Pyramids Model Of Radicalization To Terrorism, Clark Mccauley, Sophia Moskalenko

Psychology Faculty Research and Scholarship

This chapter reviews the origins and developments of the Two-Pyramids Model of radicalization, which distinguishes between the radicalization of opinions and the radicalization of actions. The Radicalization of Action Pyramid categorizes individuals from passive (inert) to those committing terrorist acts, while the Radicalization of Opinion Pyramid progresses from neutrality to a personal moral obligation to act violently for a cause. Empirical studies, including the Activism and Radicalism Intention Scales (ARIS), support the model’s distinction between activism and radicalism as separate dimensions. The chapter highlights the importance of group dynamics, diagnostic and prognostic frames, and the role of public opinion in …


Brainstem Encoding Of Speech In The Extended High Frequencies And Its Behavioral Correlates, Sajana Aryal, Fan-Yin Cheng, Srikanta K. Mishra, Spencer Smith Jan 2026

Brainstem Encoding Of Speech In The Extended High Frequencies And Its Behavioral Correlates, Sajana Aryal, Fan-Yin Cheng, Srikanta K. Mishra, Spencer Smith

Department of Communication Sciences and Disorders Faculty Scholarship and Creative Works

Whether the auditory nervous system can extract and use speech information carried in the extended high-frequency (EHF; >8 kHz) range is an unresolved question in auditory neuroscience. Although EHF sensitivity is increasingly recognized as important for speech perception, it is unclear whether EHF hearing is directly or indirectly involved in real-world listening. This study examined brainstem neural encoding of EHF speech components and the relationship between EHF hearing sensitivity and both neural and perceptual speech processing. Envelope following responses (EFRs) to broadband and high-pass filtered (>4 kHz and >8 kHz) speech stimuli, along with digits-in-noise speech recognition thresholds under …


Aac In Schools: How District Infrastructure And At Specialists Shape Implementation Practices, Grace T. Clark, Lesley Rytel, Endever* Corbin, Madison Skibicki, Gabriella Pesantes Jan 2026

Aac In Schools: How District Infrastructure And At Specialists Shape Implementation Practices, Grace T. Clark, Lesley Rytel, Endever* Corbin, Madison Skibicki, Gabriella Pesantes

Department of Communication Sciences and Disorders Faculty Scholarship and Creative Works

Purpose

Research on barriers to augmentative and alternative communication (AAC) implementation in schools has focused primarily on individual clinician factors rather than district infrastructure. This clinical focus article examined how the presence or absence of a dedicated assistive technology (AT) specialist was associated with differences in AAC implementation and the use of AAC as a Tier 1 support.

Method

Eighteen educators, including AT specialists, SLPs, and a special educator, from 17 U.S. school districts participated in a 75-minute structured Zoom focus group. They rated 11 statements about district AAC practices using a 4-point Likert scale and discussed their responses in …


Building Interprofessional Competency-Based Education Into Graduate Program Clinical Experiences: A Childhood Apraxia Of Speech And Sensory Processing Disorder Case Study Analysis, Kate Nealon, Zahava L. Friedman Jan 2026

Building Interprofessional Competency-Based Education Into Graduate Program Clinical Experiences: A Childhood Apraxia Of Speech And Sensory Processing Disorder Case Study Analysis, Kate Nealon, Zahava L. Friedman

Department of Communication Sciences and Disorders Faculty Scholarship and Creative Works

Supporting interprofessional competency-based education requires embedding educational opportunities within coursework and clinical experiences. This education prioritizes student engagement and learning from, with and about other professionals to support collaboration and communication amongst clinicians (CAIE, 2020). While the provision of interprofessional clinical opportunities is recommended, it is challenging to implement effectively in professional and pre-professional settings. Academic settings have the unique ability to provide interprofessional collaborative clinical experiences for students. This pilot study focuses on Speech Language Pathology (SLP) and Occupational Therapy (OT) clinical assessment experiences, specifically in the context of pediatric motor speech and sensory processing disorders. These disorders often …


Effect Of Graphene Oxide On The Upconversion Photoluminescence Behavior Of Er/Yb Co-Doped Pvdf-Go Composite Nanofibers, Saptasree Bose, Jack Ryan Summers, Bhupendra B. Srivastava, Karen Lozano, Victoria Padilla-Gainza Jan 2026

Effect Of Graphene Oxide On The Upconversion Photoluminescence Behavior Of Er/Yb Co-Doped Pvdf-Go Composite Nanofibers, Saptasree Bose, Jack Ryan Summers, Bhupendra B. Srivastava, Karen Lozano, Victoria Padilla-Gainza

Mechanical Engineering Faculty Publications

Upconversion photoluminescence (UCPL) materials, particularly rare-earth (RE) doped nanoparticles, have garnered significant attention due to their ability to convert near-infrared (NIR) excitation into visible emission, offering benefits such as high photostability, long lifetimes, low autofluorescence, and deep tissue penetration. Among various platforms, polymer-based one-dimensional (1D) nanofibers with in-situ lanthanide doping remain relatively unexplored, despite their superior mechanical flexibility, processability, and potential for improved luminescence performance. In this study, we report the fabrication and UCPL quenching behavior of Er3+/Yb3+ co-doped polyvinylidene difluoride (PVDF) nanofibers incorporated with graphene oxide (GO), synthesized for the first time using the scalable Forcespinning® technique. PVDF, a …


Assigning Library E-Books As Textbooks: An Examination Of Collection Development Policies And User Education Practices At Minority-Serving Institutions, Michelle Ehrenpreis Jan 2026

Assigning Library E-Books As Textbooks: An Examination Of Collection Development Policies And User Education Practices At Minority-Serving Institutions, Michelle Ehrenpreis

Publications and Research

Assigning library e-books as course textbooks can help to alleviate the financial burden of college for many students. Accordingly, libraries include e-books in their collection development policies and strive to educate users on the availability of these texts via the use of library research guides. Previous studies discuss library collection strategies and intentions to use e-books as textbooks, but do not discuss continuous or permanent plans. This study examined library policies at Hispanic Service Institutions (HSI’s) and Historically Black Colleges and Universities (HBCU’s) to evaluate how these libraries approach and document their acquisitions of library e-books. Research guides at the …


Special Tribute To Dean R. Tyndall, Ma, Otrl, Faota Jan 2026

Special Tribute To Dean R. Tyndall, Ma, Otrl, Faota

OJOT Sponsor Profiles

No abstract provided.


Misinformation And The Law, Gustavo Ribeiro Jan 2026

Misinformation And The Law, Gustavo Ribeiro

Scholarly Articles in Law Reviews & Journals

This Article bridges critical gaps between the growing body of social science research on misinformation and the persistent challenges jurors face in evaluating potentially unreliable evidence in courtrooms. Misinformation—a pervasive issue undermining decision-making in democratic societies—mirrors the difficulties jurors encounter in distinguishing truth from falsehood amid compelling but unreliable evidence. The consequences of such challenges are dire: wrongful convictions, racial disparities, and the erosion of public trust in the legal system.

This Article is the first piece of legal scholarship to provide a comprehensive discussion of current research on the psychological mechanisms underlying susceptibility to misinformation—such as the illusory truth …


The New Neccesity, Ezra Rosser Jan 2026

The New Neccesity, Ezra Rosser

Scholarly Articles in Law Reviews & Journals

According to the U.S. Supreme Court, cities are free to criminalize homelessness. The 2024 case City of Grants Pass v. Johnson is the most important homelessness case in decades and was a significant blow to advocates for the unhoused. The conservative majority rejected the idea that city ordinances criminalizing sleeping in public amounted to cruel and unusual punishment insofar as they penalized status. There is no sidestepping the loss. But within the faint glow of the embers of the oral argument and of the decision itself, there is the possibility that a new understanding of necessity, supported by the same …


Application Of Organic Geochemistry To The Characterization Of Hydrochar And Biochar: Insights Into Composition And Optimization, Michael A. Kruge, Teresa A. Centeno, Alvaro Amado-Fierro, José Manuel González-Lafuente, Rubén Forján, José Luis Gallego Jan 2026

Application Of Organic Geochemistry To The Characterization Of Hydrochar And Biochar: Insights Into Composition And Optimization, Michael A. Kruge, Teresa A. Centeno, Alvaro Amado-Fierro, José Manuel González-Lafuente, Rubén Forján, José Luis Gallego

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

Hydrothermal carbonization has garnered significant attention in recent studies due to potential applications of the hydrochar produced, which overlap with those of torrefied biochar, including soil improvement, carbon sequestration, and energy production. However, unlike the relatively uniform properties of biochar, hydrochar characteristics can vary greatly depending on the feedstock used. Advanced characterization techniques are essential to better understand these materials and enhance their practical applications. Research on hydrochar requires a multi-faceted approach, including molecular-level studies, to optimize production processes and identify specific applications.

In this regard, analytical methods commonly used in organic geochemistry could play a crucial role in deepening …


The Influence Of Scale In Modeling Social Vulnerability And Disaster Assistance, Sina Razzaghi Asl, Oronde Drakes, Eric Tate, Samuel Brody, Wesley Highfield, Kayode Atoba Jan 2026

The Influence Of Scale In Modeling Social Vulnerability And Disaster Assistance, Sina Razzaghi Asl, Oronde Drakes, Eric Tate, Samuel Brody, Wesley Highfield, Kayode Atoba

Political Science & Geography Faculty Publications

Understanding how social vulnerability relates to disaster impacts is critical for addressing social equity, yet the role of spatial scale in this relationship is often overlooked. Most studies use aggregated data, risking ecological fallacy-misinterpreting individual outcomes from group-level data. This study examines how spatial scale influences the relationship between social vulnerability and federal disaster assistance after Hurricane Harvey. Using spatial econometric models at both household and census tract levels, we assessed the strength of key vulnerability indicators in explaining disaster assistance. Results show that disability, housing tenure, household size, and income predict assistance at the household level, but their influence …


Africa As A Strategic Arena: How Great Power Rivalry Is Reshaping Security Governance, Chick Edmond Jan 2026

Africa As A Strategic Arena: How Great Power Rivalry Is Reshaping Security Governance, Chick Edmond

Political Science & Geography Faculty Publications

The rising importance of Africa as a key battleground in great power rivalry is an important shift in global politics that will have significant impacts on security governance in Africa. This article will explore the ways in which increased competition between the U.S., China and Russia will affect African states and regional organizations, and how economic dependency, regional security architecture and diplomatic strategy will influence the overall security environment in Africa. Using recent case studies and academic research, along with current policy analysis, it will analyze whether or not African countries and regional organizations will be able to mitigate potential …


Great Power Competition In Africa: Sustaining Openness Amidst Transnational Threats And Authoritarian Fragmentation, Chick Edmond Jan 2026

Great Power Competition In Africa: Sustaining Openness Amidst Transnational Threats And Authoritarian Fragmentation, Chick Edmond

Political Science & Geography Faculty Publications

As the United States seeks to position itself in an increasingly competitive world, Africa has emerged as an increasingly key arena of great power competition where the United States, China, and Russia are competing to determine the nature of political norms, economic governance and security architecture on the continent.

The combination of growing transnational threats (such as terrorism, pandemics, climate-related instability, and digital vulnerability), and growing authoritarianism, has transformed the continent into a testbed for competing visions of international order. In light of this backdrop, this paper posits that the United States must pursue a strategy of sustained strategic openness …


Security Governance In Post-Colonial Africa And Implications On Democratic Institutions, Chick Edmond Jan 2026

Security Governance In Post-Colonial Africa And Implications On Democratic Institutions, Chick Edmond

Political Science & Geography Faculty Publications

This paper will evaluate how security governance contributes to both the development of democracy and the establishment of stable institutions within newly independent post-colonial states in Africa. Security governance is examined here as it relates to the long-term influence of colonial legacy, military presence, and the politicization of the security services. The authors have based their analysis of this issue on qualitative data gathered from Nigeria, Ghana, South Africa, Democratic Republic of Congo, and Kenya. The findings of the research suggest that unless security sectors are subject to civilian oversight and adhere to democratic principles, they tend to serve the …


Nuclear Deterrence And The Security Dilemma In A Complex Multipolar World, Chick Edmond Jan 2026

Nuclear Deterrence And The Security Dilemma In A Complex Multipolar World, Chick Edmond

Political Science & Geography Faculty Publications

Objectives: The purpose of this research project is to examine how nuclear deterrence intersects with the concept of security dilemma, i.e., when a state takes an action intended to increase its own security it may inadvertently create a risk or threat to another state and contribute to increased levels of tension. Fourth, how nuclear and conventional systems are becoming increasingly interconnected, which will serve to potentially amplify risks associated with these systems.

Methods: Utilizing a qualitative analytical approach of documents such as national strategy documents, defense policy statements and historical records of crises dating from 1945-2025, the study identifies four …


Revisiting Dependency In The Twenty-First Century: A Critical Analysis Of Africa-China Relations, Chick Edmond Jan 2026

Revisiting Dependency In The Twenty-First Century: A Critical Analysis Of Africa-China Relations, Chick Edmond

Political Science & Geography Faculty Publications

This research assesses the characteristics of today’s Africa–China relations using dependency theory, world systems theory, neocolonialism, and South-South cooperation, using comparisons between historical African dependence on European colonial powers and recent reliance on China in terms of trade, infrastructure, debt, and technology. This research identifies how contemporary cooperations either continue previous patterns of economic and political subordination or create a transformation of those relationships or provide a challenge to them. Using qualitative comparative historical analysis, along with specific case studies and secondary sources (academic journals, speeches, government publications, etc.), the research demonstrates that while Africa-China relations exhibit fewer structural features …


Global Evidence On Scaling Nature-Based Solutions For Compound Hazards, Sina Razzaghi Asl, Anahita Azadgar Jan 2026

Global Evidence On Scaling Nature-Based Solutions For Compound Hazards, Sina Razzaghi Asl, Anahita Azadgar

Political Science & Geography Faculty Publications

Nature-based solutions (NbS) are increasingly promoted for climate adaptation to compound hazards, but systematic evidence of their effectiveness is still scarce. We address this gap with a systematic review of 38 studies. Each study was sorted by what its measurement design can support, not by what its authors claim. This produced four groups. Direct studies attribute a measured hazard reduction to the intervention, proxy studies infer protection from ecosystem condition, prioritization studies map suitable locations without estimating performance, and qualitative studies describe effectiveness without measuring it. We detect trends in geographic distribution, hazard combinations, intervention types, methodological approaches, and strength …


Intensive Longitudinal Methods: Toward A Psychological Science Of Daily Life, Jean-Philippe Laurenceau, Ana M. Digiovanni, Niall Bolger Jan 2026

Intensive Longitudinal Methods: Toward A Psychological Science Of Daily Life, Jean-Philippe Laurenceau, Ana M. Digiovanni, Niall Bolger

Department of Psychology Faculty Scholarship and Creative Works

Intensive longitudinal methods (ILMs) represent a class of longitudinal designs used to understand the flow of people's thoughts, feelings, physiology, and behaviors in their natural settings. This term encompasses daily diaries, experience sampling, ecological momentary assessment, ambulatory assessment, and related methods. Research on ILMs has grown exponentially, evolving into a core approach that complements more traditional designs. This article builds on this journal's first review on this topic, published in 2003. In the quarter-century since, there have been marked advances in design, technology, and statistical modeling. Three core ideas permeate this review: To build adequate theories of psychological functioning in …


Ip Law: Ai And Cracks In The Foundation Of Ip, Robin C. Feldman Jan 2026

Ip Law: Ai And Cracks In The Foundation Of Ip, Robin C. Feldman

The Judges' Book

Our implicit image of progress, and the standards we use to calibrate the value of human contributions to that progress, are quietly at risk from the onslaught of AI. AI has the potential to significantly shrink the pool of information and creative work protected by IP, particularly shrinking the protectable space for the work of human contributors.

The changes wrought by AI raise existential questions for society’s conception of human invention. I use the term “existential” here not in the modern sense of threatening something’s existence, but rather in the broad sense of philosophical existentialism, as being concerned with exploring …


Lifting The Political Fog: People, Power, And Antislavery Politics In Upstate New York, 1848-1861, Nicholas Thony Jan 2026

Lifting The Political Fog: People, Power, And Antislavery Politics In Upstate New York, 1848-1861, Nicholas Thony

Electronic Theses & Dissertations (2024 - present)

This work details the ascendance of the political antislavery movement in upstate New York, focusing on the roles a diverse array of actors played in constructing an unlikely Republican coalition of conservatives, reformers, black New Yorkers, nativists, prohibitionists, and abolitionists in the years preceding the Civil War. In weaving together the parallel and inextricable stories of powerful newspaperman Thurlow Weed, female reformers like Susan B. Anthony and Elizabeth Cady Stanton, and black communities across the state, I argue the success of the political antislavery movement resulted from their combined efforts. Thurlow Weed was one of the most important politicians of …


Synthesis Of The Naga(S1−Xsex)2 Solid Solution From Mechanically Activated Precursors, Louisiane Verger, Julien Trébosc, Santhoshkumar Sundaramoorthy, Amitava Choudhury, Olivier Hernandez, Eric Furet, Sébastien Chenu, David Le Coq, Laurent Calvez, Olivier Lafon Jan 2026

Synthesis Of The Naga(S1−Xsex)2 Solid Solution From Mechanically Activated Precursors, Louisiane Verger, Julien Trébosc, Santhoshkumar Sundaramoorthy, Amitava Choudhury, Olivier Hernandez, Eric Furet, Sébastien Chenu, David Le Coq, Laurent Calvez, Olivier Lafon

Chemistry Faculty Research & Creative Works

NaGaS2 and NaGaSe2 are two recently discovered compounds that crystallize in the same structure type. In this work, NaGa(S1−xSex)2 (x = 0.5, 0.75 and 1) are prepared using an alternative synthesis route, mechanochemistry followed by heat treatment. Na2S, Na2Se, Ga2S3 and Ga2Se3 are milled in stoichiometric proportions. Differential scanning calorimetry, X-ray diffraction and solid-state nuclear magnetic resonance (23Na and 71Ga) show that the compounds after milling are composed of crystalline NaGa(S1−xSex)2 with an amorphous part. …