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Articles 1 - 30 of 206
Full-Text Articles in Nanotechnology
Generation And Characterization Of Lipid Nanoparticles For Dna Plasmid Delivery And Pharmacological Characterization, Sahana John
Generation And Characterization Of Lipid Nanoparticles For Dna Plasmid Delivery And Pharmacological Characterization, Sahana John
Biotechnology Theses
Lipid nanoparticles (LNPs) have shown promise for delivering nucleic acids like DNA plasmids, but packaging large plasmids remains challenging. The findings and experimental work detailed in this thesis are geared towards providing a proof of concept and providing preliminary confirmation of the guiding principle.
We synthesized LNPs containing cationic lipids (D-Lin-MC3) to encapsulate the large pLVX-ZsGreen and psiCHECK (luciferase) plasmids (~10-14kb) using a microfluidic system. Characterization included size, charge, morphology, plasmid encapsulation efficiency and in vitro/in vivo studies. The LNP-pDNA particles were ~100nm in size with high encapsulation efficiency. The LNPs efficiently transfected 293T cells with low cytotoxicity, enabling strong …
Remodeling Anaplastic Thyroid Cancer's Aggressive Profile And Metabolic Signature By Natural Alkaloid Berberine, Tara Elizabeth Jarboe
Remodeling Anaplastic Thyroid Cancer's Aggressive Profile And Metabolic Signature By Natural Alkaloid Berberine, Tara Elizabeth Jarboe
NYMC Student Theses and Dissertations
Anaplastic thyroid cancer is a rare, fatal cancer with a five-year survival of 4%. Universally diagnosed at stage IV, anaplastic thyroid cancer is characterized by its lack of differentiation, rapid proliferative rate, highly inflammatory tumor microenvironment, and metabolic dysregulation. Refractory to all established therapies, anaplastic thyroid cancer requires a novel therapeutic approach that targets all of these drivers of anaplastic thyroid cancer carcinogenesis. We propose natural alkaloid berberine as a therapeutic with multitarget efficacy to alter mitochondrial metabolism and reprogram anaplastic thyroid cancer’s aggressive phenotype. Our in vitro model uses monocyte cell line U937, anaplastic thyroid cancer cell lines T238 …
Levofloxacin Incorporated Extracellular Matrix Nanoparticles For Pulmonary Cystic Fibrosis Infections, Raahi Patel
Levofloxacin Incorporated Extracellular Matrix Nanoparticles For Pulmonary Cystic Fibrosis Infections, Raahi Patel
Theses and Dissertations
Cystic fibrosis (CF) is a progressive genetic disorder that affects around 40,000 people in the United States. CF is characterized by a mutation in the CFTR protein that causes dysregulated ion transport across epithelial cells, producing viscous mucus in the lung that increases bacterial invasion, causing persistent infections and subsequent inflammation. Pseudomonas aeruginosa and Staphylococcus aureus are two of the most common infections in CF patients that are resistant to antibiotics. One antibiotic approved to treat these infections is levofloxacin (LVX) that functions to inhibit bacterial replication, but can be further developed into tailorable particles. Nanoparticles are an emerging inhaled …
Quantum Dots' Toxicity: A Multi-Level Investigation On The Impact Of Quantum Dots On The Actin Cytoskeleton, Nhi Le
MSU Graduate Theses
Quantum dots (QDs) are fluorescence nanomaterials with unique optical and physical properties. As such, they are highly sought after for their potential use in several biomedical and industrial applications. Despite their vast potential, recent studies have suggested that quantum dots are toxic to cells. Yet, the mechanism of quantum dots’ toxicity remains unclear. As such, my thesis aims to comprehensively examine the mechanism of quantum dots’ toxicity, emphasizing how quantum dots disrupt the actin cytoskeleton. In this study, I used RNA sequencing and mass spectrometry to investigate the influence of CdSe/ZnS QDs on the transcriptomic proteomic level of Saccharomyces cerevisiae …
Binding Interactions Of Biologically Relevant Molecules Studied Using Surface-Modified And Nanostructured Surfaces, Palak Sondhi
Binding Interactions Of Biologically Relevant Molecules Studied Using Surface-Modified And Nanostructured Surfaces, Palak Sondhi
Dissertations
This research focuses on the field of surface nanobioscience, wherein different nanosurfaces that will be used as working electrodes in the electrochemical cell are manufactured and surface modified to understand the critical binding interactions between biologically significant molecules like proteins, carbohydrates, small drug molecules, and glycoproteins. This research is essential if we are to determine whether a synthetic molecule can serve as a therapeutic candidate or diagnose a disease in its early stages. In order to fully understand the binding interactions, the study begins with defining some of the fundamental concepts, principles, and analytical tools for biosensing.
Afterwards, we addressed …
Transition Metal Catalyst (Tmc)-Embedded Bioorthogonal Nanozymes For Anticancer Therapeutics, Xianzhi Zhang
Transition Metal Catalyst (Tmc)-Embedded Bioorthogonal Nanozymes For Anticancer Therapeutics, Xianzhi Zhang
Doctoral Dissertations
Bioorthogonal chemistry offers versatile strategies for monitoring and modulating biomolecules in their native environments through abiotic chemical reactions. Bioorthogonal catalysis via transition metal catalysts (TMCs) provides the controlled activation of anticancer therapeutics, which mimics the enzymatic amplifications. However, the direct use of TMCs in living systems faces challenges such as instability, poor solubility, and low biocompatibility. Engineering the structure of TMCs can partially solve the problems, but the rapid clearance of small molecules hurdles the in vivo applications. Therefore, embedding TMCs in/onto nanomaterials to obtain bioorthogonal nanozymes enhances stability, solubility, biocompatibility, and the presence of the catalysts in biological environments …
Atomistic Assessment Of Drug-Phospholipid Interactions Consequent To Cancer Treatment: A Study Of Anthracycline Cardiotoxicity, Yara Elsayed Ahmed
Atomistic Assessment Of Drug-Phospholipid Interactions Consequent To Cancer Treatment: A Study Of Anthracycline Cardiotoxicity, Yara Elsayed Ahmed
Theses and Dissertations
Despite being one of the most effective chemotherapeutic agents developed to date, Anthracyclines are notorious for their cardiotoxicity. Their clinical use is frequently limited both in dosage and in prescription due to the severe cardiac damage they cause. The mechanism of anthracycline-induced cardiotoxicity is not yet fully understood. However, it is hypothesized that interactions with the myocardial membrane play an important role in imparting cardiotoxicity. In this study, we use molecular dynamics simulations and density functional theory calculations to study the anthracycline drug molecules and the interactions that they have with the myocardial membrane. We construct a myocardial membrane model …
Unveiling Pain: Wearables For Objective Pain Measurement, Hanqing Tang
Unveiling Pain: Wearables For Objective Pain Measurement, Hanqing Tang
Masters Theses
">">Pain perception is a subjective experience that differs significantly among individuals, often leading to inconsistencies in assessment and management. A critical issue within this context is the gender bias in pain evaluation, which contributes to unequal treatment and perpetuates gender inequality within the healthcare system. This thesis presents an in-depth investigation of the problem and proposes the development of a wearable device for objective pain assessment. Physiological parameters — Electrocardiography (ECG) can be collected from cardiac sound signals auscultated by fabrics via nanometre-scale vibrations. Machine learning methods can accurately classify heart rate and acute pain intensity of participants. …
Preparing Homogenous Composites Of Collagen And Cellulose Nanocrystals For Tissue Engineering Research, Zachary Stanley
Preparing Homogenous Composites Of Collagen And Cellulose Nanocrystals For Tissue Engineering Research, Zachary Stanley
Biological and Agricultural Engineering Undergraduate Honors Theses
Advancements in medicine and our understanding of stem cells have led to a greater emphasis on further developing research focused on tissue engineering. This research has led to the rise of both two-dimensional and three-dimensional scaffolds that can be utilized to repair bone, skin, vascular, and potentially even nervous tissue. One of the prominent compounds used in modern scaffolds is collagen-based hydrogels due to their low antigenicity and ability to provide structure to cells. There is potential to further improve upon this three-dimensional scaffold by incorporating cellulose nanocrystals (CNCs) into a composite hydrogel with collagen. The addition would increase the …
Leveraging Bio-Inspired Molecules For Cancer Theranostics, Douglas S. Macpherson
Leveraging Bio-Inspired Molecules For Cancer Theranostics, Douglas S. Macpherson
Dissertations, Theses, and Capstone Projects
A variety of molecules can be radiolabeled and delivered to a cancer site for the purposes of diagnostics and therapy. Among the most promising of tumor targeting molecules are peptides and antibodies. These bio-inspired molecules can be designed and synthesized to target and respond to cancer cells based on the properties of those cells. Matrix metalloproteinase (MMP) enzymes are over-expressed by some metastatic cancers, in which they are responsible for the degradation and remodeling of the extracellular matrix. In recent years, MMPs have emerged as promising targets for enzyme-responsive diagnostic probes because oligopeptides can be designed to be selectively hydrolyzed …
Coulomb Blockade-Mediated Field Emission Sources Using Ultra-Nanocrystalline Diamond, Jevin Jensen
Coulomb Blockade-Mediated Field Emission Sources Using Ultra-Nanocrystalline Diamond, Jevin Jensen
Graduate Research Theses & Dissertations
Coulomb Blockade effects in field emission provide interesting means of achieving brighter electron sources for numerous applications, ranging from vacuum electronics to the next generation of electron beam technology. Microelectronics cleanroom methods are presented in this thesis for production of field emission sources moderated by the Coulomb Blockade. The use of common processes is an essential step toward widespread experimentation with Coulomb Blockade-mediated field emission apparatuses. The main feature to be explored is the use of nano-diamond films for their potential applicability for this desired outcome. Ultra-Nanocrystalline Diamond is used in two different ways to achieve this, both as a …
Self-Assembled Ternary Polypeptide Nanoparticles With Improved Biostability For Drug Delivery In Cancer Therapy, Preye Mike Agbana
Self-Assembled Ternary Polypeptide Nanoparticles With Improved Biostability For Drug Delivery In Cancer Therapy, Preye Mike Agbana
Theses and Dissertations--Pharmacy
Cancer remains a real and present threat to global health. In the United States, according to cancer statistics, almost 40% of people will be diagnosed with cancer at some point in their lifetime. Conventional chemotherapy has become the mainstay for cancer treatment option. However, chemotherapeutic agents are plagued with problems such as poor aqueous solubility, chemical degradation, Bio instability, and off-site toxicity due to non-specificity. New drug modalities are needed to tackle the ever-growing burden on cancer. In recent times, the promise of nanotechnology has aided to develop drug delivery vehicles to facilitate the administration of potent chemotherapeutics. Nanoformulations such …
Investigation Of Folate-Poly(Glutamic Acid)/Polyethylenimine/Dna Complexes For In Vitro Gene Delivery, Caleb Akers
Investigation Of Folate-Poly(Glutamic Acid)/Polyethylenimine/Dna Complexes For In Vitro Gene Delivery, Caleb Akers
Theses and Dissertations--Pharmacy
Gene therapy is currently being studied as a treatment for a variety of indications, including cancer, infectious disease, and cardiovascular diseases, among others. While many of the early treatments in the field involved the use of viral delivery methods, various safety, ethical, and financial concerns limit the potential uses of this methodology. As such, more recent research has focused on developing non-viral delivery platforms to alleviate some of the issues inherent in viral delivery. Recently, the release of the COVID-19 vaccines from Pfizer and Moderna represents a promising use of non-viral delivery as both utilized a lipid-based delivery vector.
Despite …
Effect Of Decorating Super Paramagnetic Iron Oxide Nanoparticles With Silver Nanoparticles On Their Magneto-Photo Thermal Heating Efficiency, Anthony Joseph Afful
Effect Of Decorating Super Paramagnetic Iron Oxide Nanoparticles With Silver Nanoparticles On Their Magneto-Photo Thermal Heating Efficiency, Anthony Joseph Afful
All Graduate Theses, Dissertations, and Other Capstone Projects
Cancer treatment is rather dangerous to the body, often involving many secondary effects, including nausea, hair loss, and weight fluctuations. The search for non-invasive, highly efficient, and targetable treatments ameliorates these issues. Super paramagnetic iron oxide nanoparticles (SPIONS) have been used for other medical purposes such as magnetic resonance imaging contrast agent and is being extensively studied as a potential candidate for many cancer therapeutic and diagnostic approaches due to its biocompatibility and superior magnetic properties. When subjected to an external alternating magnetic field SPIONS generate heat mainly due to the friction of the SPIONS against the fluid it is …
Development And Praxis Of Ph Drug Delivery System Contra Zika, Julissa Rodriguez
Development And Praxis Of Ph Drug Delivery System Contra Zika, Julissa Rodriguez
Electronic Theses and Dissertations
As the effects of global warming continue to spread throughout the world, another critical issue is slowly gaining attention in many urban tropical countries. The Emerging Infectious Diseases/ Pathogens list from the National Institutes of Health (NIH) listed the Zika virus as a potential pandemic threat. In 2015, an outbreak of Zika was noted in several South American countries until the spread reached an all-time high of 87 countries in 2017. During the outbreaks, adults affected were noted to have joint and muscle pains, fevers, and rashes. The worst cases reported would ultimately lead to Guillain-Barre symptoms. Still, pregnant women …
The Impact Of Pegylation On Cellular Uptake And In Vivo Biodistribution Of Gold Nanoparticle Mri Contrast Agents., Nagwa El-Baz
The Impact Of Pegylation On Cellular Uptake And In Vivo Biodistribution Of Gold Nanoparticle Mri Contrast Agents., Nagwa El-Baz
Electronic Theses and Dissertations
Gold nanoparticles (GNPs) have become a pivotal platform for the delivery of pharmaceutical and diagnostic agents as well as for general therapeutic purposes. Despite their potential for use in biomedicine, their interaction with serum proteins is crucial as it could change their biological profile due to the formation of a protein corona, which can affect their delivery to target tissues in the body. Grafting the GNPs with polyethylene glycol (PEG) is widely used in research to decrease opsonization of the particles by serum proteins and decrease the uptake by the reticuloendothelial system. Here in this dissertation, we have developed a …
Frontiers In The Self-Assembly Of Charged Macromolecules, Khatcher O. Margossian
Frontiers In The Self-Assembly Of Charged Macromolecules, Khatcher O. Margossian
Doctoral Dissertations
The self-assembly of charged macromolecules forms the basis of all life on earth. From the synthesis and replication of nucleic acids, to the association of DNA to chromatin, to the targeting of RNA to various cellular compartments, to the astonishingly consistent folding of proteins, all life depends on the physics of the organization and dynamics of charged polymers. In this dissertation, I address several of the newest challenges in the assembly of these types of materials. First, I describe the exciting new physics of the complexation between polyzwitterions and polyelectrolytes. These materials open new questions and possibilities within the context …
Controlling Myosin’S Function Via Interactions Between The Substrate And The Active Site, Mike K. Woodward
Controlling Myosin’S Function Via Interactions Between The Substrate And The Active Site, Mike K. Woodward
Doctoral Dissertations
Molecular motors, such as myosin, have evolved to transduce chemical energy from ATP into mechanical work to drive essential cellular processes, from muscle contraction to vesicular transport. Dysfunction in these motors is a root cause of many pathologies necessitating the application of intrinsic control over molecular motor function. We hypothesized that altering the myosin’s energy substrate via minor positional changes to the triphosphate portion of the molecule will allow us to control the protein and affect its in vitro function. We utilized positional isomers of a synthetic non-nucleoside triphosphate, azobenzene triphosphate, and assessed whether myosin’s force- and motion-generating capacity could …
Quality By Design Based Optimization Of Anti-Inflammatory Nanoemulgels For Local Treatment Of Burn Wounds, Leah Dickey
Quality By Design Based Optimization Of Anti-Inflammatory Nanoemulgels For Local Treatment Of Burn Wounds, Leah Dickey
Electronic Theses and Dissertations
Burns are some of the most traumatizing and damaging skin injuries, with the potential of causing extensive internal damage that increases the risk of chronic wound development. Oral and topical analgesics in combination with antibiotics can provide temporary relief and improve wound healing progress for both mild and severe burns. However, recurrent systemic exposure to pain relievers and antibiotics has been associated with adverse side effects including nausea, drowsiness, abdominal pain, etc., and increased risk of new infections or even ulcers. Local and targeted drug delivery systems, such as nanomedicine, have gained attention as potentially more effective alternatives to improve …
Enhancing Vanadium Redox Battery Performance Using Tungsten-Bismuth-Based Oxide Nanostructures As Electrode Modifiers, Taher Al Najjar
Enhancing Vanadium Redox Battery Performance Using Tungsten-Bismuth-Based Oxide Nanostructures As Electrode Modifiers, Taher Al Najjar
Theses and Dissertations
Renewable energy power plants require high efficiency conversion and storage systems that can store high amounts of energy and can be integrated with the electrical grid. Vanadium redox flow batteries are very promising for this application. However, one major drawback of VRFBs is their low power density which means that right now they cannot replace non-renewable energy sources. Different carbon materials are used as electrodes in VRFBs and each carbon material affects the battery’s performance in a different way. Modification of these electrodes can increase the power density of the battery. Some metal oxides like tungsten oxide can enhance vanadium …
Biomimetic And Medical Applications Of Hollow Nanoscale Structures, Justin Fang
Biomimetic And Medical Applications Of Hollow Nanoscale Structures, Justin Fang
Dissertations, Theses, and Capstone Projects
Materials whose structure incorporates nanoscale void spaces have multiple possible uses, whether in a bulk form or as individual particles, due to the combination of high surface area ratios and nanoscale material properties. This thesis will explore a few of these possibilities, concentrating on potential biomimetic and biomedical applications, for two materials: metal- organic frameworks and superparamagnetic iron oxide nanocages.
Metal-organic frameworks consist of metal ions such as Cu2+ which have highly porous lattice structures allowing them to absorb and release guest molecules such as peptides like diphenylalanine; this stored chemical energy can be turned into kinetic energy and used …
Isolation And Characterization Of Α-Hcd7 Scfv Expressing Exosomes And Synthesis Of Hybrid Exosome-Liposome For Analyses, Sahil Patel
Biotechnology Theses
The goal of this thesis project is to isolate and characterize exosomes that express anti-human CD7 (α-hCD7) single chain variable fragment (scFv), which will be further utilized for T celltargeted gene editing. To reach this goal, exosomes from HEK 293 cells and Jurkat cells were isolated and characterized with different methodologies. To obtain α-hCD7 scFv-expressing exosomes, the HEK 293 cells were subjected to transfection of custom-plasmid pDisplay-αhCD7 scFv, and the expression of α-hCD7 scFv on the HEK 293-derived exosomes were then confirmed by immunogold staining, western blotting, and flow cytometry. To transfect 293 cells, calcium phosphate transfection was utilized, and …
Lc-Ms Identification Of Serum Proteins Adsorbed Onto Ionic Liquid-Coated Nanoparticles, Anh M. Hoang
Lc-Ms Identification Of Serum Proteins Adsorbed Onto Ionic Liquid-Coated Nanoparticles, Anh M. Hoang
Honors Theses
Nanocarriers are promising candidates for drug delivery due to their size and tunable surface characteristics. However, when they are intravenously injected, few particles make it to their designated location. This is because upon entering the bloodstream, the serum in the blood, which is rich with a diversity of proteins, adsorbs onto the particles’ surfaces forming a protein corona. Many of the attached proteins trigger the mobile immune system and are removed by macrophages, and many particles are then filtered out by the liver and kidneys. Ionic Liquids (ILs), which consist of asymmetric, bulky components that are liquid
Macromolecular Fluorescent Conjugates For Bioimaging Applications, Paul Lovell
Macromolecular Fluorescent Conjugates For Bioimaging Applications, Paul Lovell
Theses & Dissertations
Bioimaging tools enable the visualization of small anatomical features as well as structures that may be obscured by other tissue. One such group of tools are fluorescent probes, molecules that emit detectable signals when stimulated by an excitation source. Incorporating fluorescent conjugates for clinical purposes would enable direct usage for the diagnosis, detection, or treatment of diseases. The development of specific targeting agents is feasible due to the number of nanomaterials and biological products that contain fluorophores. Specific targeting agents can target a particular region of interest, such as a cancerous tumor for removal or vital nerve structure for avoidance …
Modulation Of Immune Homeostasis In Neurodegenerative Diseases, Pravin Yeapuri
Modulation Of Immune Homeostasis In Neurodegenerative Diseases, Pravin Yeapuri
Theses & Dissertations
Modulating the immune system via. transformation of CD4+ T cell effector to regulatory (Teff to Treg) or promoting microglial clearance of abnormal disease proteins are attractive therapeutic strategies to restore immunological balance in neurodegenerative diseases like Parkinson’s disease (PD) and Alzheimer’s disease (AD). In the past decade, we defined a safe and effective pathway for Treg induction through the cytokine granulocyte-macrophage colony-stimulating factor (GM-CSF). GM-CSF was developed in PD animal models and early phase I human studies demonstrating proof-of-concept efficacy for ameliorating disease signs and symptoms. Despite the recorded efficacy, the medicine’s short half-life, limited bioavailability, and injection site reactions …
Polymeric Nanocarriers For Delivery Of Small Molecules Inhibiting Tubulin Polymerization For The Treatment Of Pancreatic Cancer And Lung Metastatic Melanoma, Rajan Sharma Bhattarai
Polymeric Nanocarriers For Delivery Of Small Molecules Inhibiting Tubulin Polymerization For The Treatment Of Pancreatic Cancer And Lung Metastatic Melanoma, Rajan Sharma Bhattarai
Theses & Dissertations
The aim of this thesis is to develop delivery systems for the novel small molecules which inhibit tubulin polymerization. One of the small molecules was modified to lipid conjugate to increase the lipophilicity of the molecules which in turn drastically improved the drug loading in amphiphilic polymeric system. The second molecule was conjugated to the amphiphilic polymeric backbone with pH sensitive Schiff’s linker for the tumor site specific delivery in lung metastatic melanoma model.
Chapter 1 discusses the tumor microenvironment for the solid tumor especially focusing on Pancreatic Ductal Adenocarcinoma (PDAC). Further the drug delivery system currently researched for addressing …
The Role Of Ionic Liquids In Gold Nanorod Synthesis, Noah Grovich
The Role Of Ionic Liquids In Gold Nanorod Synthesis, Noah Grovich
Honors Theses
The term cancer is used to define a large set of medical conditions that result from uncontrolled cell proliferation. The severity of cancer ranges depending on several factors, but it is one of the leading causes of death in approximately 60% of the world. Current treatment options are often not efficacious and face many limitations especially regarding limiting the secondary damage to healthy cells. Gold nanorods have shown to be a potential solution for effectively overcoming many of these barriers, but their employment is limited due to toxicity concerns stemming from the use of hexadecyltrimethylammonium bromide (CTAB) in their synthesis. …
The Use Of Spectral Imaging To Reveal Inorganics And Organics Identity In The Biological Samples, Qamar Alshammari
The Use Of Spectral Imaging To Reveal Inorganics And Organics Identity In The Biological Samples, Qamar Alshammari
Pharmaceutical Sciences (PhD) Dissertations
The wavelength is used to identify the exact location and quantify the number of molecules in the spectral imaging system. It aids in identifying materials and studying their quantities by examining how they interact with light. A traditional spectrometer provides spectrum information of chemical compounds, while standard imaging provides the intensity at each pixel of the image. Spectral imaging (SI) combines these two aspects by equipping intensity and spectral data for each pixel. In biomedical research, it is important to assess the inorganics/organics molecules to understand drug activity, cellular toxicity, and distribution. Using the microscopy technique, we found for the …
Synthesis Of A Functionalized Trans-Cyclooctene (Tco) For Selective Protein Isolation After Bioorthogonal Labeling With Tetrazine, Thaddeus Lawrence Puzdrakiewicz, Dillon P. Mcbee, Joshua A. Baccile
Synthesis Of A Functionalized Trans-Cyclooctene (Tco) For Selective Protein Isolation After Bioorthogonal Labeling With Tetrazine, Thaddeus Lawrence Puzdrakiewicz, Dillon P. Mcbee, Joshua A. Baccile
Chancellor’s Honors Program Projects
No abstract provided.
Surface Engineering For Controlled Growth And Deposition Of Nanomaterials - Assembly And Design At The Nano-Microscale, David Fox
Electronic Theses and Dissertations, 2020-
Materials with nanoscale dimensions offer several important benefits over bulk materials (e.g. increased surface area, low-cost, deviation from bulk properties, etc.). Such materials are critical components for next-generation energy storage materials, optoelectronic devices, and catalyst systems. However, these materials are often processed in liquid media, and their diminutive structures are fragile in the presence of capillary forces. As such, preparing uniform and stable nanomaterial coatings is a significant challenge. Herein, we discuss an approach where the substrate itself is factored into the assembly and growth of these materials. First, nanoporous surfaces were utilized to achieve a uniform deposition of one-dimensional …