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Nanotechnology Fabrication Commons

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277 full-text articles. Page 1 of 12.

Nanostructured Morphologies In Glassy Polymer Networks, Brian Greenhoe 2016 University of Southern Mississippi

Nanostructured Morphologies In Glassy Polymer Networks, Brian Greenhoe

Dissertations

The body of this work describes a novel approach for the dispersion of multi-walled carbon nanotubes in a high Tg epoxy prepolymer matrix using a twin screw high-shear continuous reactor. The method demonstrated improves on previous dispersion methods in several ways. It offers increased efficiency through excellent heat transfer, while being solvent-less, scale-able, and tailorable to drive dispersion states to judiciously chosen dispersion states. Furthermore, it was shown that dispersion state and agglomerate morphology can be directed, in several ways, through processing conditions and also by controlling the matrix viscosity profile through cure. Broadband dielectric spectroscopy, optical hot-stage microscopy ...


Dispersion Of Particles In Liquid Metal Using Contactless Electromagnetic Stirring, Koulis A. Pericleous, Valdis Bojarevics, Georgi S. Djambazov 2016 University of Greenwich

Dispersion Of Particles In Liquid Metal Using Contactless Electromagnetic Stirring, Koulis A. Pericleous, Valdis Bojarevics, Georgi S. Djambazov

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Reward Modulated Spike Timing Dependent Plasticity Based Learning Mechanism In Spiking Neural Networks, Shrihari Sridharan, Gopalakrishnan Srinivasan, Kaushik Roy 2016 Purdue University

Reward Modulated Spike Timing Dependent Plasticity Based Learning Mechanism In Spiking Neural Networks, Shrihari Sridharan, Gopalakrishnan Srinivasan, Kaushik Roy

The Summer Undergraduate Research Fellowship (SURF) Symposium

Spiking Neural Networks (SNNs) are one of the recent advances in machine learning that aim to further emulate the computations performed in the human brain. The efficiency of such networks stems from the fact that information is encoded as spikes, which is a paradigm shift from the computing model of the traditional neural networks. Spike Timing Dependent Plasticity (STDP), wherein the synaptic weights interconnecting the neurons are modulated based on a pair of pre- and post-synaptic spikes is widely used to achieve synaptic learning. The learning mechanism is extremely sensitive to the parameters governing the neuron dynamics, the extent of ...


Wearable Piezotronic Devices For Heart Rate Monitoring, Adam J. Miller, Wenzhuo Wu Dr. 2016 Purdue University

Wearable Piezotronic Devices For Heart Rate Monitoring, Adam J. Miller, Wenzhuo Wu Dr.

The Summer Undergraduate Research Fellowship (SURF) Symposium

Self-powered multifunctional wearable devices that are capable of human-device interfacing are highly desired. Piezotronic devices utilize piezoelectricity and semiconductor properties to enable devices to have seamless interaction between human and device. One important use for piezotronic devices is for pressure sensing. Pressure sensing devices have been employed in smart skins, biomonitoring, gesture recognition, and many more applications. This study aims to create a flexible piezotronic device, specifically for use in pressure sensing to monitor heart rate. ZnO nanowires are grown on a flexible polymer substrate so that they can be made into wearable devices. A p-n heterojunction is formed by ...


Mechanical Reliability Of Implantable Polyimide-Based Magnetic Microactuators For Biofouling Removal, Christian G. Figueroa-Espada, Qi Yang, Hyowon Lee 2016 University of Puerto Rico, Mayaguez

Mechanical Reliability Of Implantable Polyimide-Based Magnetic Microactuators For Biofouling Removal, Christian G. Figueroa-Espada, Qi Yang, Hyowon Lee

The Summer Undergraduate Research Fellowship (SURF) Symposium

Hydrocephalus is a neurological disorder that typically requires a long-term implantation of a shunt system to manage its symptoms. These shunt systems are notorious for their extremely high failure rate. More than 40% of all implanted shunt systems fail within the first year of implantation. On average, 85% of all hydrocephalus patients with shunt systems undergo at least two shunt-revision surgeries within 10 years of implantation. A large portion of this high failure rate can be attributed to biofouling-related obstructions and infections. Previously, we developed flexible polyimide-based magnetic microactuators to remove obstructions formed on hydrocephalus shunts. To test the long-term ...


Atomistic Configuration Interaction Simulation Tool For Semiconductor Based Quantum Computing Devices, Jingbo Wu, Archana Tankasala, Jim Fonseca, Rajib Rahman, Gerhard Klimeck 2016 Purdue University

Atomistic Configuration Interaction Simulation Tool For Semiconductor Based Quantum Computing Devices, Jingbo Wu, Archana Tankasala, Jim Fonseca, Rajib Rahman, Gerhard Klimeck

The Summer Undergraduate Research Fellowship (SURF) Symposium

Solid-state devices are promising candidates for quantum computing applications due to obvious advantages in compatibility with semiconductor fabrication technologies and the extremely long coherent times of electron and nuclear spins in these devices. In such devices, electron interactions are crucial for single and two qubit gate operations. Thus it is essential to evaluate these electron-electron interactions accurately for precise qubit control. It is shown that Atomistic Configuration Interaction can be used to accurately determine electron-electron interactions in realistic semiconductor quantum computing devices. In this work, an online simulation tool on Atomistic Configuration Interaction has been implemented and published on nanoHUB ...


Spin Curves For Microchem S1800 (1805, 1813, 1818) Series Positive Resist, Mohsen Azadi, Gerald G. Lopez 2016 Singh Center for Nanotechnology

Spin Curves For Microchem S1800 (1805, 1813, 1818) Series Positive Resist, Mohsen Azadi, Gerald G. Lopez

Tool Data

Spin curves for MicroChem's S1805, S1813, and S1818 were generated and mapped using the Filmetrics F50. Statistical measurements were performed (N=85) and are reported here.


Sonochemical Synthesis Of Zinc Oxide Nanostructures For Sensing And Energy Harvesting, Phani Kiran Vabbina 2016 Department of Electrical and Computer Engineering, Florida International University

Sonochemical Synthesis Of Zinc Oxide Nanostructures For Sensing And Energy Harvesting, Phani Kiran Vabbina

FIU Electronic Theses and Dissertations

Semiconductor nanostructures have attracted considerable research interest due to their unique physical and chemical properties at nanoscale which open new frontiers for applications in electronics and sensing. Zinc oxide nanostructures with a wide range of applications, especially in optoelectronic devices and bio sensing, have been the focus of research over the past few decades. However ZnO nanostructures have failed to penetrate the market as they were expected to, a few years ago. The two main reasons widely recognized as bottleneck for ZnO nanostructures are (1) Synthesis technique which is fast, economical, and environmentally benign which would allow the growth on ...


The Important Contribution Of Photo-Generated Charges To The Silicon Nanocrystals Photo-Charging/Discharging-Response Time At Room Temperature In Mos-Photodetectors, Samir Chatbouri, Manel Troudi, Abdelaali Fargi, Adel Kalboussi, Abdelkader Souifi 2016 Faculty of Sciences of Monastir

The Important Contribution Of Photo-Generated Charges To The Silicon Nanocrystals Photo-Charging/Discharging-Response Time At Room Temperature In Mos-Photodetectors, Samir Chatbouri, Manel Troudi, Abdelaali Fargi, Adel Kalboussi, Abdelkader Souifi

Abdelaali Fargi

The results are reported of a detailed investigation into the photogenerated changes that occur in the capacitance–voltage (CV) characteristics of Metal-Oxide-Semiconductor (MOS) photodetector, having a silicon nanocrystals (Si-ncs) embedded in SiOx=1.5 tunnel oxide layers. In order to study the influence of photon energy on charging/discharging photo-response of nanocrystal-based MOS structures, we have examined photo-capacitance-voltage (photo-CV) measurements at both light intensities 45 μW and 75 μW and wavelengths 436 nm and 595 nm. The photo-CV measurements indicate the important contribution of photo-generated charges to the charging/discharging mechanism. The (Si-ncs) charging/discharging photo-response time is ...


Design And Implementation Of An Integrated Biosensor Platform For Lab-On-A-Chip Diabetic Care Systems, Khandaker Abdullah Al Mamun 2016 University of Tennessee - Knoxville

Design And Implementation Of An Integrated Biosensor Platform For Lab-On-A-Chip Diabetic Care Systems, Khandaker Abdullah Al Mamun

Doctoral Dissertations

Recent advances in semiconductor processing and microfabrication techniques allow the implementation of complex microstructures in a single platform or lab on chip. These devices require fewer samples, allow lightweight implementation, and offer high sensitivities. However, the use of these microstructures place stringent performance constraints on sensor readout architecture. In glucose sensing for diabetic patients, portable handheld devices are common, and have demonstrated significant performance improvement over the last decade. Fluctuations in glucose levels with patient physiological conditions are highly unpredictable and glucose monitors often require complex control algorithms along with dynamic physiological data. Recent research has focused on long term ...


High Contrast 50kv E-Beam Lithography For Hsq Atop Diamond Using Espacer For Spin-On Charge Dissipation, Richard R. Grote, Lee C. Bassett, Gerald G. Lopez 2016 University of Pennsylvania

High Contrast 50kv E-Beam Lithography For Hsq Atop Diamond Using Espacer For Spin-On Charge Dissipation, Richard R. Grote, Lee C. Bassett, Gerald G. Lopez

Protocols and Reports

A high contrast HSQ process atop diamond is presented. A water soluable spin-on conductive layer called ESPACER is used as a charge dissipation layer in lieu of a metal thin film.


Suss Microtec Ma6 Gen3 - S1813 Contrast Curve Data, Jonathan Bryan, Steven Wood, Gerald G. Lopez 2016 University of Pennsylvania

Suss Microtec Ma6 Gen3 - S1813 Contrast Curve Data, Jonathan Bryan, Steven Wood, Gerald G. Lopez

Protocols and Reports

No abstract provided.


Suss Microtec Ma6 Gen3 - S1818 Contrast Curve Data, Jonathan Bryan, Steven Wood, GERALD G. LOPEZ 2016 University of Pennsylvania

Suss Microtec Ma6 Gen3 - S1818 Contrast Curve Data, Jonathan Bryan, Steven Wood, Gerald G. Lopez

Protocols and Reports

No abstract provided.


Heidelberg Dwl66+ S1813 Contrast Curves, Steven Wood, GERALD G. LOPEZ 2016 University of Pennsylvania

Heidelberg Dwl66+ S1813 Contrast Curves, Steven Wood, Gerald G. Lopez

Protocols and Reports

Accurately gauge the optimal machine setting for MicroChem S1813 using the Heidelberg DWL 66+ and plot the contrast curves for the 2mm and 10mm writeheads.


Heidelberg Dwl66+ S1805 Contrast Curves, Steven Wood, Gerald G. Lopez 2016 University of Pennsylvania

Heidelberg Dwl66+ S1805 Contrast Curves, Steven Wood, Gerald G. Lopez

Protocols and Reports

Accurately gauge the optimal machine setting for MicroChem S1805 using the Heidelberg DWL 66+ and obtain contrast curves based on the 2mm and 10mm writehead.


Heidelberg Dwl66+ S1818 Contrast Curves, Steven Wood, GERALD G. LOPEZ 2016 University of Pennsylvania

Heidelberg Dwl66+ S1818 Contrast Curves, Steven Wood, Gerald G. Lopez

Protocols and Reports

Accurately gauge the optimal machine setting for MicroChem S1818 using the Heidelberg DWL 66+ and plot the contrast curves for the 2mm and 10mm writeheads.


Beyond Conventional C-Plane Gan-Based Light Emitting Diodes: A Systematic Exploration Of Leds On Semi-Polar Orientations, Morteza Monavarian 2016 Virginia Commonwealth University

Beyond Conventional C-Plane Gan-Based Light Emitting Diodes: A Systematic Exploration Of Leds On Semi-Polar Orientations, Morteza Monavarian

Theses and Dissertations

Despite enormous efforts and investments, the efficiency of InGaN-based green and yellow-green light emitters remains relatively low, and that limits progress in developing full color display, laser diodes, and bright light sources for general lighting. The low efficiency of light emitting devices in the green-to-yellow spectral range, also known as the “Green Gap”, is considered a global concern in the LED industry. The polar c-plane orientation of GaN, which is the mainstay in the LED industry, suffers from polarization-induced separation of electrons and hole wavefunctions (also known as the “quantum confined Stark effect”) and low indium incorporation efficiency that ...


Optical Investigations Of Ingan Heterostructures And Gesn Nanocrystals For Photonic And Phononic Applications: Light Emitting Diodes And Phonon Cavities, Shopan d. Hafiz 2016 hafizsd

Optical Investigations Of Ingan Heterostructures And Gesn Nanocrystals For Photonic And Phononic Applications: Light Emitting Diodes And Phonon Cavities, Shopan D. Hafiz

Theses and Dissertations

InGaN heterostructures are at the core of blue light emitting diodes (LEDs) which are the basic building blocks for energy efficient and environment friendly modern white light generating sources. Through quantum confinement and electronic band structure tuning on the opposite end of the spectrum, Ge1−xSnx alloys have recently attracted significant interest due to its potential role as a silicon compatible infra-red (IR) optical material for photodetectors and LEDs owing to transition to direct bandgap with increasing Sn. This thesis is dedicated to establishing an understanding of the optical processes and carrier dynamics in InGaN heterostructures for ...


Research On Microelectronics And Nanotechnologies At Georgia Tech, Oliver Brand 2016 Institute for Electronics and Nanotechnology

Research On Microelectronics And Nanotechnologies At Georgia Tech, Oliver Brand

Review of Progress in Quantitative Nondestructive Evaluation

The presentation provides an overview of the nanotechnology fabrication resources available at Georgia Tech’s Institute for Electronics and Nanotechnology (IEN) and highlights some of the research activities enabled by them. The IEN cleanrooms and characterization labs are part of the NSF-funded National Nanotechnology Coordinated Infrastructure (NNCI) and are used by almost 700 researchers on an annual base. Supported activities range from materials and process development to micro/nano device and system integration.


Novel Approach In Mechanical Characterization Of Thin Films For Nano Electronics, Malgorzata Kopycinska-Müller, Andre Clausner, Kong-Boon Yeap, Bernd Köhler 2016 Ehrenfried Zschech, IKTS

Novel Approach In Mechanical Characterization Of Thin Films For Nano Electronics, Malgorzata Kopycinska-Müller, Andre Clausner, Kong-Boon Yeap, Bernd Köhler

Review of Progress in Quantitative Nondestructive Evaluation

Mechanical characterization of nano-thin layers with high lateral resolution is as important for nanoelectronics as challenging. We have investigated mechanical properties of porous organosilicate glasses (OSG) with ultralow values of dielectric permittivity (dielectric constant k < 2.4). We have used the atomic force acoustic microscopy (AFAM) method to determine the indentation modulus for two sets of the OSG thin films. The first set has consisted of three samples of nominal porosity varying from 27% to 40% with thickness of 650 nm. The values of the indentation modulus obtained for these samples have varied from 4 GPa to 7 GPa depending on the pore concentration and been in excellent agreement with those determined by nanoindentation. Having confirmed the reliability of the AFAM method, we have determined the indentation modulus of OSG films with the nominal porosity of 30% and film thickness decreasing from 350 nm to 46 nm, a level challenging for standard nanoindentation methods. Interestingly, we have observed an increase of the indentation modulus with the decreasing film thickness. To ensure that our results were free of the substrate influence, we have used tips of different radii and applied them within different ranges of the static load. We have also analyzed the ratio of the sample deformation as well as the tip radius to the film thickness. The results of our analysis have been compared for all the measurement series and showed, which ones have been free of the substrate influence. The stiffening observed for the porous films could be explained by evolution of the pore topology as a function of the film thickness.

Our results prove the capabilities of the AFAM method in studies of mechanical properties of thin films, especially those made of novel functional material used in nanoelectronics and lacking a bulk equivalent.


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