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2247 full-text articles. Page 1 of 81.

A Ship-In-A-Bottle Strategy To Synthesize Encapsulated Intermetallic Nanoparticle Catalysts: Exemplified For Furfural Hydrogenation, Raghu V. Maligal-Ganesh, Chaoxian Xiao, Tian Wei Goh, Lin-Lin Wang, Jeffrey Gustafson, Yuchen Pei, Zhiyuan Qi, Duane D. Johnson, Shiran Zhang, Franklin Feng Tao, Wenyu Huang 2017 Iowa State University

A Ship-In-A-Bottle Strategy To Synthesize Encapsulated Intermetallic Nanoparticle Catalysts: Exemplified For Furfural Hydrogenation, Raghu V. Maligal-Ganesh, Chaoxian Xiao, Tian Wei Goh, Lin-Lin Wang, Jeffrey Gustafson, Yuchen Pei, Zhiyuan Qi, Duane D. Johnson, Shiran Zhang, Franklin Feng Tao, Wenyu Huang

Duane D. Johnson

Intermetallic compounds are garnering increasing attention as efficient catalysts for improved selectivity in chemical processes. Here, using a ship-in-a-bottle strategy, we synthesize single-phase platinum-based intermetallic nanoparticles (NPs) protected by a mesoporous silica (mSiO2) shell by heterogeneous reduction and nucleation of Sn, Pb, or Zn in mSiO2-encapsulated Pt NPs. For selective hydrogenation of furfural to furfuryl alcohol, a dramatic increase in activity and selectivity is observed when intermetallic NPs catalysts are used in comparison to Pt@mSiO2. Among the intermetallic NPs, PtSn@mSiO2 exhibits the best performance, requiring only one-tenth of the quantity of Pt used ...


Characterization Of Sputtering Copper Using The Denton Explorer-14 System, Roman Mays 2017 University of Pennsylvania

Characterization Of Sputtering Copper Using The Denton Explorer-14 System, Roman Mays

Tool Data

No abstract provided.


Progress Towards Terahertz Acoustic Phonon Generation In Doping Superlattices, Thomas E. Wilson 2017 Marshall University

Progress Towards Terahertz Acoustic Phonon Generation In Doping Superlattices, Thomas E. Wilson

Thomas E. Wilson

Progress is described in experiments to generate coherent terahertz acoustic phonons in silicon doping superlattices by the resonant absorption of nanosecond-pulsed far-infrared laser radiation. Future experiments are proposed that would use the superlattice as a transducer in a terahertz cryogenic acoustic reflection microscope with sub-nanometer resolution.


Plasma Enhanced Chemical Vapor Deposition (Pecvd) Of Silicon Nitride (Sinx) Using Oxford Instruments System 100 Pecvd, Meredith Metzler, Raj Patel 2017 Singh Center for Nanotechnology

Plasma Enhanced Chemical Vapor Deposition (Pecvd) Of Silicon Nitride (Sinx) Using Oxford Instruments System 100 Pecvd, Meredith Metzler, Raj Patel

Tool Data

This report discusses the deposition process of SiNx using the Oxford System 100 PECVD.


Optimization Of Plasma Enhanced Chemical Vapor Deposition (Pecvd) Of Amorphous Silicon (A-Si) Using Oxford Instruments System 100 With Taguchi L9 Based Design Of Experiments (Doe), Raj Patel, Meredith Metzler 2017 University of Pennsylvania

Optimization Of Plasma Enhanced Chemical Vapor Deposition (Pecvd) Of Amorphous Silicon (A-Si) Using Oxford Instruments System 100 With Taguchi L9 Based Design Of Experiments (Doe), Raj Patel, Meredith Metzler

Tool Data

No abstract provided.


Characterization Of Sputtering Platinum Using The Denton Explorer-14 System, Roman Mays 2017 University of Pennsylvania

Characterization Of Sputtering Platinum Using The Denton Explorer-14 System, Roman Mays

Tool Data

No abstract provided.


Examination Of The Stoney Equation And A Practical Determination Of The Error In Residual Film Stress Measurements, Roman Mays 2017 University of Pennsylvania

Examination Of The Stoney Equation And A Practical Determination Of The Error In Residual Film Stress Measurements, Roman Mays

Protocols and Reports

No abstract provided.


The Measurement Of Residual Film Stress In Deposited Thin Films Using The Kla-Tencor 2d/3d P7 Surface Profilometer, Roman Mays 2017 University of Pennsylvania

The Measurement Of Residual Film Stress In Deposited Thin Films Using The Kla-Tencor 2d/3d P7 Surface Profilometer, Roman Mays

Protocols and Reports

No abstract provided.


Plasma Enhanced Chemical Vapor Deposition (Pecvd) Of Silicon Dioxide (Sio2) Using Oxford Instruments System 100 Pecvd, Meredith Metzler, Raj Patel 2017 Singh Center for Nanotechnology

Plasma Enhanced Chemical Vapor Deposition (Pecvd) Of Silicon Dioxide (Sio2) Using Oxford Instruments System 100 Pecvd, Meredith Metzler, Raj Patel

Tool Data

This report discusses the deposition process of SiO2 using the Oxford System 100 PECVD.


Structural Mrsa Resistance Through Carbon-Infiltrated Carbon Nanotube Coating Of External Fixator Pins, Jaclyn Larsen, Stephanie Morco, Brian Jensen, Anton Bowden 2017 Brigham Young University

Structural Mrsa Resistance Through Carbon-Infiltrated Carbon Nanotube Coating Of External Fixator Pins, Jaclyn Larsen, Stephanie Morco, Brian Jensen, Anton Bowden

Biomedical Engineering Western Regional Conference

No abstract provided.


Inkjet Printing Of Ag Nanoparticles Using Dimatix Inkjet Printer, No 1, Amal Abbas, Inayat Bajwa 2017 Quattrone Nanofabrication Facility

Inkjet Printing Of Ag Nanoparticles Using Dimatix Inkjet Printer, No 1, Amal Abbas, Inayat Bajwa

Protocols and Reports

Ag nanoparticle inkjet printing on polyimide and polyethylene terephthalate films has been performed using Dimatix inkjet printer at Quattrone Nanofabrication Facility. This article describes selection of Ag nanoparticle inks and reports the progress of optimization of drop spacing, drop frequency, droplet size, and waveform for high resolution features, and furthermore reveals the pros and cons of Dimatix inkjet printing. In addition, the resistivity of Ag nanoparticle line sintered was determined to be ~2.2 x 10-5 Ωm. The adhesion and bending tests indicated that Ag nanoparticle pattern sintered on PI and PET films had exceptional mechanical stability.


Tunable Nanocomposite Membranes For Water Remediation And Separations, Sebastián Hernández Sierra 2017 University of Kentucky

Tunable Nanocomposite Membranes For Water Remediation And Separations, Sebastián Hernández Sierra

Theses and Dissertations--Chemical and Materials Engineering

Nano-structured material fabrication using functionalized membranes with polyelectrolytes is a promising research field for water pollution, catalytic and mining applications. These responsive polymers react to external stimuli like temperature, pH, radiation, ionic strength or chemical composition. Such nanomaterials provide novel hybrid properties and can also be self-supported in addition to the membranes.

Polyelectrolytes (as hydrogels) have pH responsiveness. The hydrogel moieties gain or lose protons based on the pH, displaying swelling properties. These responsive materials can be exploited to synthesize metal nanoparticles in situ using their functional groups, or to immobilize other polyelectrolytes and biomolecules. Due to their properties, these ...


Activity Preservation Of Plasmonic Biosensors With A Metal-Organic Framework, Lu Wang 2016 Washington University in St. Louis

Activity Preservation Of Plasmonic Biosensors With A Metal-Organic Framework, Lu Wang

Engineering and Applied Science Theses & Dissertations

Antibody-antigen recognition enables antibody-conjugated nanostructures to serve as plasmonic biosensors with tunable specificity. However due to the instability of antibodies, these biosensors are susceptible to changes in the environment such as heat and aridity, leading to constraints on the transportation and handling of these sensors. Here we establish a method using a metal-organic framework crystal to preserve biosensor activity under severe environmental conditions, including exposure to high temperatures, an organic solvent and a proteolytic agent. After zeolitic imidazolate framework-8 (ZIF-8) crystals formed for 12 hours on a biosensor of gold nanorods conjugated with a model antibody, rabbit IgG, 80% of ...


The Effect Of A Powered Ankle Foot Orthosis On Walking In A Stroke Subject: A Case Study, Ali Pourghasem, Ismail Ebrahimi Takamjani, Mohammad Taghi Karimi, Mohammad Kamali, Mohammad Jannesari, Iman Salafian 2016 Iran University of Medical Sciences

The Effect Of A Powered Ankle Foot Orthosis On Walking In A Stroke Subject: A Case Study, Ali Pourghasem, Ismail Ebrahimi Takamjani, Mohammad Taghi Karimi, Mohammad Kamali, Mohammad Jannesari, Iman Salafian

Mechanical & Materials Engineering Faculty Publications

[Purpose] Standing and walking are impaired in stroke patients. Therefore, assisted devices are required to restore their walking abilities. The ankle foot orthosis with an external powered source is a new type of orthosis. The aim of this study was to evaluate the performance of a powered ankle foot orthosis compared with unpowered orthoses in a stroke patient.

[Subjects and Methods] A single stroke subject participated in this study. The subject was fitted with three types of ankle foot orthosis (powered, posterior leg spring, and carbon ankle foot orthoses). He was asked to walk with and without the three types ...


Zep520a Contrast Curves, Gerald G. Lopez Ph.D., Mohsen Azadi 2016 Singh Center for Nanotechnology

Zep520a Contrast Curves, Gerald G. Lopez Ph.D., Mohsen Azadi

Protocols and Reports

This report documents the contrast curves for the ZEP520A electron beam lithography resist from ZEON Chemicals. Dilution by weight of ZEP520A vs spin speed from 1000 to 6000 rpm was generated in previous work. The aim is to provide an approximate clearing and base dose for the ZEP520A standard process at the Singh Center for Nanotechnology.


Pmma A2 Contrast Curves, Gerald G. Lopez Ph.D., Mohsen Azadi 2016 Singh Center for Nanotechnology

Pmma A2 Contrast Curves, Gerald G. Lopez Ph.D., Mohsen Azadi

Protocols and Reports

This report documents the contrast curves for the PMMA A2 electron beam lithography resist from MicroChem. Spin curves for PMMA A2 can be found in previous work. The aim is to provide an approximate clearing and base dose for the PMMA A2 standard process at the Singh Center for Nanotechnology.


Elionix Els-7500ex: Field Size Analysis, Gerald G. Lopez Ph.D., Mohsen Azadi 2016 Singh Center for Nanotechnology

Elionix Els-7500ex: Field Size Analysis, Gerald G. Lopez Ph.D., Mohsen Azadi

Protocols and Reports

This report documents the field distortion of the Elionix ELS-7500EX electron beam lithography system at the University of Pennsylvania Singh Center for Nanotechnology at the Quattrone Nanofabrication Facility. The system is equipped with a 20MHz fixed clock and fixed focus. The aim of the work is to understand optimal field sizes to use for critical dimensions 80nm and above. Field uniformity was analyzed as a function of critical dimension and objective lens aperture (OLA) a.k.a. final paerture. As features scale down below 300nm, they are more susceptible to the systematic effects of field distortion. Suggested field sizes depend ...


Zirconium Diboride, Hexagonal Boron Nitride, And Amorphous Alumina Thin Films For High Temperature Applications, David Murdock Stewart 2016 University of Maine

Zirconium Diboride, Hexagonal Boron Nitride, And Amorphous Alumina Thin Films For High Temperature Applications, David Murdock Stewart

Electronic Theses and Dissertations

The use of microelectronic sensors and actuators in harsh, high temperature environments, such as power plants, turbine engines, and industrial manufacturing, could greatly improve the safety, reliability, and energy efficiency of these processes. The primary challenge in implementing this technology is the breakdown and degradation of thin films used in fabricating these devices when exposed to high temperatures >800 °C and oxidizing atmospheres. Zirconium diboride, hexagonal boron nitride, and amorphous alumina are candidate materials for use as thin film sensor components due to their high melting temperatures and stable phases. Zirconium diboride thin films have metallic-like electrical conductivity and remain ...


Scanning Electron Microscopy Laboratory Portfolio, Ian E. Newcomb 2016 SUNY College of Environmental Science and Forestry

Scanning Electron Microscopy Laboratory Portfolio, Ian E. Newcomb

N.C. Brown Center for Ultrastructure Studies

These images were prepared by Ian Newcomb as part of the class MCR 484 Scanning Electron Microscopy at SUNY College of Environmental Science and Forestry, Fall 2016.

All images were acquired on the JEOL JSM 5800 LV Scanning Electron Microscope in the N. C. Brown Center for Ultrastructure Studies


Scanning Electron Microscopy Laboratory Portfolio, Gwendolyn F. Stark 2016 SUNY College of Environmental Science and Forestry

Scanning Electron Microscopy Laboratory Portfolio, Gwendolyn F. Stark

N.C. Brown Center for Ultrastructure Studies

The MCR 484 course is designed to provide students with the skills and knowledge to properly operate a Scanning Electron Microscope. In this collection are some of my best pictures from the course, as well as pictures that demonstrate the skills I have learned.


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