Effect Of Surfaces On Strength Evolution Of Silicon Nanostructures PDF Download

Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Effect Of Surfaces On Strength Evolution Of Silicon Nanostructures PDF full book. Access full book title Effect Of Surfaces On Strength Evolution Of Silicon Nanostructures.

Effect of Surfaces on Strength Evolution of Silicon Nanostructures

Effect of Surfaces on Strength Evolution of Silicon Nanostructures
Author: Scott Joseph Grutzik
Publisher:
Total Pages: 184
Release: 2015
Genre:
ISBN:

Download Effect of Surfaces on Strength Evolution of Silicon Nanostructures Book in PDF, ePub and Kindle

Previous experiments have shown a link between oxidation and strength changes in single crystal silicon nanostructures but provided no clues as to the mechanisms leading to this relationship. Through a mix of atomic force microscope based fracture strength experiments, molecular dynamics modeling, and comparisons to past experiments we have show that the previously described strength decrease is a result of oxidation induced roughening of an initially flat silicon (1 1 1) surface and that this effect is transient. In a fully developed native oxide the Si-SiO2 interface flattens. As a result the strength recovers with some indication that it becomes slightly stronger than in its initially hydrogen terminated state. Experimental results are corroborated by Brad Boyce at Sandia National Laboratories using a completely separate line of testing involving micro-scale, polysilicon devices and the slack chain method. In addition, we demonstrate improvements to the calibration of the strength testing procedure, justify constitutive assumptions, and reduce overall uncertainty. Finally, we make an effort to extend the previous study of the effect of methyl monolayers on strength evolution of Si nanostructures by looking at more coating materials and longer time scales.


Oxide Driven Strength Evolution of Silicon Surfaces

Oxide Driven Strength Evolution of Silicon Surfaces
Author:
Publisher:
Total Pages:
Release: 2015
Genre:
ISBN:

Download Oxide Driven Strength Evolution of Silicon Surfaces Book in PDF, ePub and Kindle

Previous experiments have shown a link between oxidation and strength changes in single crystal silicon nanostructures but provided no clues as to the mechanisms leading to this relationship. Using atomic force microscope-based fracture strength experiments, molecular dynamics modeling, and measurement of oxide development with angle resolved x-ray spectroscopy we study the evolution of strength of silicon (111) surfaces as they oxidize and with fully developed oxide layers. We find that strength drops with partial oxidation but recovers when a fully developed oxide is formed and that surfaces intentionally oxidized from the start maintain their high initial strengths. MD simulations show that strength decreases with the height of atomic layer steps on the surface. These results are corroborated by a completely separate line of testing using micro-scale, polysilicon devices, and the slack chain method in which strength recovers over a long period of exposure to the atmosphere. Lastly, combining our results with insights from prior experiments we conclude that previously described strength decrease is a result of oxidation induced roughening of an initially flat silicon (1 1 1) surface and that this effect is transient, a result consistent with the observation that surfaces flatten upon full oxidation.


Fracture and Fatigue, Volume 7

Fracture and Fatigue, Volume 7
Author: Carroll Jay
Publisher: Springer Science & Business Media
Total Pages: 97
Release: 2013-08-23
Genre: Science
ISBN: 3319007653

Download Fracture and Fatigue, Volume 7 Book in PDF, ePub and Kindle

Fracture and Fatigue, Volume 7: Proceedings of the 2013 Annual Conference on Experimental and Applied Mechanics, the seventh volume of eight from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on a wide range of areas, including: Microstructural Effects in Fatigue & Fracture Fracture of Interfaces Fracture of Composites and Interface Cracks Fatigue & Fracture: Environmental & Loading Effects Fracture & Digital Image Correlation


Nanotribology and Nanomechanics

Nanotribology and Nanomechanics
Author: Bharat Bhushan
Publisher: Springer
Total Pages: 930
Release: 2017-04-05
Genre: Technology & Engineering
ISBN: 3319514334

Download Nanotribology and Nanomechanics Book in PDF, ePub and Kindle

This textbook and comprehensive reference source and serves as a timely, practical introduction to the principles of nanotribology and nanomechanics. This 4th edition has been completely revised and updated, concentrating on the key measurement techniques, their applications, and theoretical modeling of interfaces. It provides condensed knowledge of the field from the mechanics and materials science perspectives to graduate students, research workers, and practicing engineers.


Advanced Approaches Applied to Materials Development and Design Predictions

Advanced Approaches Applied to Materials Development and Design Predictions
Author: Abílio M. P. De Jesus
Publisher: MDPI
Total Pages: 164
Release: 2020-03-25
Genre: Technology & Engineering
ISBN: 3039284126

Download Advanced Approaches Applied to Materials Development and Design Predictions Book in PDF, ePub and Kindle

This thematic issue on advanced simulation tools applied to materials development and design predictions gathers selected extended papers related to power generation systems, presented at the XIX International Colloquium on Mechanical Fatigue of Metals (ICMFM XIX), organized at University of Porto, Portugal, in 2018. In this issue, the limits of the current generation of materials are explored, which are continuously being reached according to the frontier of hostile environments, whether in the aerospace, nuclear, or petrochemistry industry, or in the design of gas turbines where efficiency of energy production and transformation demands increased temperatures and pressures. Thus, advanced methods and applications for theoretical, numerical, and experimental contributions that address these issues on failure mechanism modeling and simulation of materials are covered. As the Guest Editors, we would like to thank all the authors who submitted papers to this Special Issue. All the papers published were peer-reviewed by experts in the field whose comments helped to improve the quality of the edition. We also would like to thank the Editorial Board of Materials for their assistance in managing this Special Issue.


Nanomechanics of Materials and Structures

Nanomechanics of Materials and Structures
Author: Tze-jer Chuang
Publisher: Springer Science & Business Media
Total Pages: 348
Release: 2006-07-11
Genre: Technology & Engineering
ISBN: 9781402039515

Download Nanomechanics of Materials and Structures Book in PDF, ePub and Kindle

This book is derived from the proceedings of the International Workshop on Nanomechanics held at Asilomar Conference Grounds in Pacific Grove, California on July 14-17, 2004. Approximately 70 leading experts from academia, government and industrial sectors in semiconductors, computers, communication, information technology, defense, energy, transportation and aerospace attended the Workshop (see the workshop photo taken on July 16, 2004). The main objective was to convene leading researchers in the nanotechnology community to assess the current state-of-the-art and disseminate recent progress, critical issues, barriers to applications, and directions for future research in nanomechanics. Miniaturization of structural components and functional devices such as electronic, optical, mechanical and electric-magnetic parts has been a recent trend, and the pace has accelerated over the past few years. Advances in micromanufacturing, semiconductor processing (e.g., etching, lithography, grafting, etc.), sensors, actuators and microprocessors have opened up a revolutionary path to the development of new technologies such as micro-electro-mechanical systems (MEMS), nano-electro-mechanical systems (NEMS), micro-engines, smart structures, smart controllers, lab-- a-chip devices, and even bio-medical sensing devices which can detect, analyze, decide and activate appropriate functions in real time. The above-mentioned devices, structures, or systems, have one issue in common. In order to perform their assigned functions, they must maintain their structural integrity and be reliable and durable during their entire designed service life. Thus, strength, durability, and time-dependent mechanical property degradation are major concerns for design engineers and device manufacturers, even though the parts are designed for electronic, magnetic, optical or other functions.


Silicon Nanocrystals

Silicon Nanocrystals
Author: Lorenzo Pavesi
Publisher: John Wiley & Sons
Total Pages: 648
Release: 2010-02-02
Genre: Technology & Engineering
ISBN: 9783527629961

Download Silicon Nanocrystals Book in PDF, ePub and Kindle

This unique collection of knowledge represents a comprehensive treatment of the fundamental and practical consequences of size reduction in silicon crystals. This clearly structured reference introduces readers to the optical, electrical and thermal properties of silicon nanocrystals that arise from their greatly reduced dimensions. It covers their synthesis and characterization from both chemical and physical viewpoints, including ion implantation, colloidal synthesis and vapor deposition methods. A major part of the text is devoted to applications in microelectronics as well as photonics and nanobiotechnology, making this of great interest to the high-tech industry.


Crystal Dislocations: Their Impact on Physical Properties of Crystals

Crystal Dislocations: Their Impact on Physical Properties of Crystals
Author: Peter Lagerlof
Publisher: MDPI
Total Pages: 317
Release: 2019-01-09
Genre:
ISBN: 303897465X

Download Crystal Dislocations: Their Impact on Physical Properties of Crystals Book in PDF, ePub and Kindle

This book is a printed edition of the Special Issue "Crystal Dislocations: Their Impact on Physical Properties of Crystals" that was published in Crystals