Optical Properties of Silicon-Rich Silicon Nitride (SixNyHz) from First Principles

Tao, Shuxia; Theulings, A. M. M. G.; Prodanović, V.; Smedley, J.; Graaf, H. van der

doi:10.3390/computation3040657

Cited by 12 publications

(14 citation statements)

References 30 publications

(38 reference statements)

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“…16 Lastly, a recent theoretical study calculated the dielectric function of silicon nitride using density functional theory. 95 The results were consistent with the measurements of Philipp for b-SiN-a crystalline phase of silicon nitride. The same study also examined both the effect of defects due to excess Si and the effect of hydrogen termination on the optical properties.…”

Section: Thin-film Silicon Nitride Membranessupporting

confidence: 89%

Through a Window, Brightly: A Review of Selected Nanofabricated Thin-Film Platforms for Spectroscopy, Imaging, and Detection

Dwyer

Harb

2017

Appl Spectrosc

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We present a review of the use of selected nanofabricated thin films to deliver a host of capabilities and insights spanning bioanalytical and biophysical chemistry, materials science, and fundamental molecular-level research. We discuss approaches where thin films have been vital, enabling experimental studies using a variety of optical spectroscopies across the visible and infrared spectral range, electron microscopies, and related techniques such as electron energy loss spectroscopy, X-ray photoelectron spectroscopy, and single molecule sensing. We anchor this broad discussion by highlighting two particularly exciting exemplars: a thin-walled nanofluidic sample cell concept that has advanced the discovery horizons of ultrafast spectroscopy and of electron microscopy investigations of in-liquid samples; and a unique class of thin-film-based nanofluidic devices, designed around a nanopore, with expansive prospects for single molecule sensing. Free-standing, low-stress silicon nitride membranes are a canonical structural element for these applications, and we elucidate the fabrication and resulting features-including mechanical stability, optical properties, X-ray and electron scattering properties, and chemical natureof this material in this format. We also outline design and performance principles and include a discussion of underlying material preparations and properties suitable for understanding the use of alternative thin-film materials such as graphene.

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Section: Thin-film Silicon Nitride Membranessupporting

confidence: 89%

Through a Window, Brightly: A Review of Selected Nanofabricated Thin-Film Platforms for Spectroscopy, Imaging, and Detection

Dwyer

Harb

2017

Appl Spectrosc

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“…Silicon-rich nitride is widely used in the opto-electronics industry (e.g. Papet et al, 2006;Tao et al, 2015) and initially was preferred for our application due to its better mechanical properties compared with pure Si 3 N 4 (lower inherent stress and less brittle). Fig.…”

Section: Resultsmentioning

confidence: 99%

Oxygen K-edge X-ray absorption spectra of liquids with minimization of window contamination

Vogt¹,

Cotelesage²,

Titus³

et al. 2021

J Synchrotron Radiat

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Oxygen K-edge X-ray absorption spectroscopy is used routinely to study a range of solid materials. However, liquid samples are studied less frequently at the oxygen K-edge due to the combined challenges of high-vacuum conditions and oxygen contamination of window materials. A modular sample holder design with a twist-seal sample containment system that provides a simple method to encapsulate liquid samples under high-vacuum conditions is presented. This work shows that pure silicon nitride windows have lower oxygen contamination than both diamond- and silicon-rich nitride windows, that the levels of oxygen contamination are related to the age of the windows, and provides a protocol for minimizing the background oxygen contamination. Acid-washed 100 nm-thick silicon nitride windows were found to give good quality oxygen K-edge data on dilute liquid samples.

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“…As first-principle calculations have been widely applied in the analysis of various physical properties [21], the effect of the Au doping concentration on the electronic structure of the MgO film was analyzed on the basis of first-principle calculations. The band structures and work functions of the undoped and Au-doped MgO crystals were calculated with the Cambridge Serial Total Energy Package simulation program.…”

Section: Methodsmentioning

confidence: 99%

Au Doping Effect on the Secondary Electron Emission Performance of MgO Films

Wang

et al. 2018

Materials

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Au-doped MgO films were prepared by reactive sputtering of individual Mg and Au targets, and the Au doping effect on the electron-induced secondary electron emission (SEE) performance was explored by means of surface analysis, first-principle calculation, and electrical characteristic measurement. The results show that the size enlargement of MgO grains and the reduction of surface work functions induced by Au doping are the main reasons for the increase of the SEE coefficient (δ). Additionally, the superior SEE degradation property of the Au-doped MgO film under continuous electron bombardment results from the improvement of electrical conductivity. Through the optimization of Au doping concentration (x), Au-doped MgO film with an x value of 3.0% was found to have the best SEE performance due to its highest SEE coefficient and longest duration of maintaining a relatively high SEE coefficient; its maximum δ value reached 11.5—an increase of 32.2% in comparison with the undoped one.

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Optical Properties of Silicon-Rich Silicon Nitride (SixNyHz) from First Principles

Cited by 12 publications

References 30 publications

Through a Window, Brightly: A Review of Selected Nanofabricated Thin-Film Platforms for Spectroscopy, Imaging, and Detection

Through a Window, Brightly: A Review of Selected Nanofabricated Thin-Film Platforms for Spectroscopy, Imaging, and Detection

Oxygen K-edge X-ray absorption spectra of liquids with minimization of window contamination

Au Doping Effect on the Secondary Electron Emission Performance of MgO Films

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