Recent Developments in Experimental and Theoretical Studies of The Mechanical Behavior of Polycrystalline Silicon for Microelectromechanical Systems

1998 ◽  
Vol 546 ◽  
Author(s):  
R. Ballarini
Keyword(s):  
Mechanical Behavior ◽  
Predictive Models ◽  
Polycrystalline Silicon ◽  
Microelectromechanical Systems ◽  
Theoretical Studies ◽  
Data Bases ◽  
Device Reliability ◽  
Recent Developments ◽  
Silicon Structures ◽  
Experimental And Theoretical Studies

AbstractA review of recent developments in experimental and theoretical studies of the mechanicalbehavior of polycrystalline silicon structures whose dimensions are comparable to those of typicalmicro electromechanical systems devices is presented. It is concluded that although great strides have been made towards understanding this behavior, there is a need to develop robust standardized experimental techniques, and in turn, material data bases that are required to verify and calibrate predictive models for calculating device reliability.

scholarly journals Recent developments in the study of deconfinement in nucleus–nucleus collisions

2014 ◽  
Vol 23 (05) ◽  
pp. 1430008 ◽  
Author(s):  
M. Gazdzicki ◽  
M. I. Gorenstein ◽  
P. Seyboth
Keyword(s):  
Recent Progress ◽  
Theoretical Studies ◽  
Future Studies ◽  
The Past ◽  
Strongly Interacting ◽  
Model Predictions ◽  
Matter Model ◽  
Recent Developments ◽  
Onset Of Deconfinement ◽  
Experimental And Theoretical Studies

Deconfinement refers to the creation of a state of quasi-free quarks and gluons in strongly interacting matter. Model predictions and experimental evidence for the onset of deconfinement in nucleus–nucleus collisions were discussed in our first review on this subject. These results motivated further experimental and theoretical studies. This review addresses two subjects. First, a summary of the past, present and future experimental programmes related to discovery and study of properties of the onset of deconfinement are presented. Second, recent progress is reviewed on analysis methods and preliminary experimental results for new strongly intensive fluctuation measures are discussed, which are relevant for current and future studies of the onset of deconfinement and searches for the critical point of strongly interacting matter.

scholarly journals Sulvanites: The Promise at the Nanoscale

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 823
Author(s):  
Roberto Prado-Rivera ◽  
Chen-Yu Chang ◽  
Mimi Liu ◽  
Cheng-Yu Lai ◽  
Daniela R. Radu
Keyword(s):  
Optoelectronic Devices ◽  
Synthesis Methods ◽  
Theoretical Studies ◽  
Printable Electronics ◽  
Solar Photovoltaics ◽  
Copper Chalcogenides ◽  
The Past ◽  
Recent Developments ◽  
Experimental And Theoretical Studies ◽  
Insight Into

The class of ternary copper chalcogenides Cu3MX4 (M = V, Nb, Ta; X = S, Se, Te), also known as the sulvanite family, has attracted attention in the past decade as featuring promising materials for optoelectronic devices, including solar photovoltaics. Experimental and theoretical studies of these semiconductors have provided much insight into their properties, both in bulk and at the nanoscale. The recent realization of sulvanites at the nanoscale opens new avenues for the compounds toward printable electronics. This review is aimed at the consideration of synthesis methods, relevant properties and the recent developments of the most important sulvanites.

The Stabilizing Effect of Pre-Equilibria: A Trifluoromethyl Complex as CF2 Reservoir in Catalytic Olefin Difluorocarbenation

2020 ◽  
Author(s):  
Thomas Louis-Goff ◽  
Huu Vinh Trinh ◽  
Eileen Chen ◽  
Arnold L. Rheingold ◽  
Christian Ehm ◽  
...  
Keyword(s):  
High Selectivity ◽  
Side Reactions ◽  
Theoretical Studies ◽  
Attractive Feature ◽  
Catalyst Recovery ◽  
Wide Range ◽  
Stabilizing Effect ◽  
Experimental And Theoretical Studies

A new, efficient, catalytic difluorocarbenation of olefins to give 1,1-difluorocyclopropanes is presented. The catalyst, an organobismuth complex, uses TMSCF<sub>3</sub> as a stoichiometric difluorocarbene source. We demonstrate both the viability and robustness of this reaction over a wide range of alkenes and alkynes, including electron-poor alkenes, to generate the corresponding 1,1-difluorocyclopropanes and 1,1-difluorocyclopropenes. Ease of catalyst recovery from the reaction mixture is another attractive feature of this method. In depth experimental and theoretical studies showed that the key difluorocarbene-generating step proceeds through a bismuth non-redox synchronous mechanism generating a highly reactive free CF<sub>2</sub> in an endergonic pre-equilibrium. It is the reversibility when generating the difluorocarbene that accounts for the high selectivity, while minimizing CF<sub>2</sub>-recombination side-reactions.

3D Printing in Pharmaceuticals: Regulatory Perspective

2019 ◽  
Vol 24 (42) ◽  
pp. 5081-5083 ◽  
Author(s):  
Mohd. A. Mirza ◽  
Zeenat Iqbal
Keyword(s):  
New Technologies ◽  
Pharmaceutical Product ◽  
Regulatory Agencies ◽  
Major Research ◽  
Data Bases ◽  
Drug Products ◽  
Regulatory Perspective ◽  
Regulatory Guidelines ◽  
Recent Developments ◽  
Technical Issues

Background: The last few decades have witnessed enormous advancements in the field of Pharmaceutical drug, design and delivery. One of the recent developments is the advent of 3DP technology. It has earlier been successfully employed in fields like aerospace, architecture, tissue engineering, biomedical research, medical device and others, has recently forayed into the pharmaceutical industry.Commonly understood as an additive manufacturing technology, 3DP aims at delivering customized drug products and is the most acceptable form of“personalized medicine”. Methods: Data bases and search engines of regulatory agencies like USFDA and EMA have been searched thoroughly for relevant guidelines and approved products. Other portals like PubMed and Google Scholar were also ferreted for any relevant repository of publications are referred to wherever required. Results: So far only one pharmaceutical product has been approved in this category by USFDA and stringent regulatory agencies are working over the drafting of guidelines and technical issues. Major research of this category belongs to the academic domain. Conclusion: It is also implicit to such new technologies that there would be numerous challenges and doubts before these are accepted as safe and efficacious. The situation demands concerted and cautious efforts to bring in foolproof regulatory guidelines which would ultimately lead to the success of this revolutionary technology.

Strong coupling: resonant effects

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Strong Coupling ◽  
Experimental Studies ◽  
Strong Coupling Regime ◽  
Theoretical Studies ◽  
Stimulated Scattering ◽  
Quantum Theories ◽  
Pump Probe ◽  
Exciton Polaritons ◽  
Linear Optical Properties ◽  
Experimental And Theoretical Studies

This chapter presents experimental studies performed on planar semiconductor microcavities in the strong-coupling regime. The first section reviews linear experiments performed in the 1990s that evidence the linear optical properties of cavity exciton-polaritons. The chapter is then focused on experimental and theoretical studies of resonantly excited microcavity emission. We mainly describe experimental configuations in which stimulated scattering was observed due to formation of a dynamical condensate of polaritons. Pump-probe and cw experiments are described in addition. Dressing of the polariton dispersion and bistability of the polariton system due to inter-condensate interactions are discussed. The semiclassical and the quantum theories of these effects are presented and their results analysed. The potential for realization of devices is also discussed.

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