Multifluid electrospinning for the generation of complex nanostructures

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
Deng‐Guang Yu ◽  
Menglong Wang ◽  
Xiaoyan Li ◽  
Xinkuan Liu ◽  
Li‐Min Zhu ◽  
...  
Keyword(s):  
Complex Nanostructures

Metal-Assisted Plasma Etching of Silicon: A Liquid-Free Alternative to MACE

2018 ◽  
Author(s):  
Julia Sun ◽  
Benjamin Almquist
Keyword(s):  
Liquid Phase ◽  
Plasma Etching ◽  
Chemical Etching ◽  
Gold Films ◽  
Metallic Films ◽  
Au Catalyst ◽  
Feed Concentration ◽  
Catalytic Activities ◽  
Metal Assisted Chemical Etching ◽  
Complex Nanostructures

For decades, fabrication of semiconductor devices has utilized well-established etching techniques to create complex nanostructures in silicon. Of these, two of the most common are reactive ion etching in the gaseous phase and metal-assisted chemical etching (MACE) in the liquid phase. Though these two methods are highly established and characterized, there is a surprising scarcity of reports exploring the ability of metallic films to catalytically enhance the etching of silicon in dry plasmas via a MACE-like mechanism. Here, we discuss a <u>m</u>etal-<u>a</u>ssisted <u>p</u>lasma <u>e</u>tch (MAPE) performed using patterned gold films to catalyze the etching of silicon in an SF<sub>6</sub>/O<sub>2</sub> mixed plasma, selectively increasing the rate of etching by over 1000%. The degree of enhancement as a function of Au catalyst configuration and relative oxygen feed concentration is characterized, along with the catalytic activities of other common MACE metals including Ag, Pt, and Cu. Finally, methods of controlling the etch process are briefly explored to demonstrate the potential for use as a liquid-free fabrication strategy.

Shape-controlled synthesis of nanostructured Co-doped ZnO thin films and their magnetic properties

CrystEngComm ◽  
2018 ◽  
Vol 20 (38) ◽  
pp. 5844-5856 ◽  
Author(s):  
F. A. Taher ◽  
E. Abdeltwab
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Zno Thin Films ◽  
Controlled Synthesis ◽  
Shape Controlled ◽  
Doped Zno ◽  
Co Doped ◽  
Complex Nanostructures

Three ferromagnetic complex nanostructures (flower, sheaf, and cactus) of Co-doped ZnO thin films were selectively grown from 1D to 3D.

Complex nanostructures of ZnO: growth and properties

2009 ◽  
Vol 4 (1/2/3/4) ◽  
pp. 34 ◽  
Author(s):  
Ahmad Umar ◽  
Y.K. Park ◽  
Y.B. Hahn ◽  
A. Al Hajry
Keyword(s):  
Complex Nanostructures

Solid-state transformation of single precursor vanadium complex nanostructures to V2O5 and VO2: catalytic activity of V2O5 for oxidative coupling of 2-naphthol

2015 ◽  
Vol 44 (4) ◽  
pp. 1889-1899 ◽  
Author(s):  
Mukul Pradhan ◽  
Anindita Roy ◽  
Arun Kumar Sinha ◽  
Ramkrishna Sahoo ◽  
Dibakar Deb ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Solid State ◽  
Oxidative Coupling ◽  
Vanadium Complex ◽  
State Transformation ◽  
Solid State Transformation ◽  
Single Precursor ◽  
Complex Nanostructures

Solid-state transformation of a vanadium complex to V2O5 and VO2 nanostructures and the catalytic activity of V2O5 for the oxidative coupling of 2-naphthol.

Fabrication of complex nanostructures on ZnO crystals by the interference of three femtosecond laser beams

2012 ◽  
Vol 50 (2) ◽  
pp. 297-302 ◽  
Author(s):  
Kan Zhou ◽  
Pingxin Xiong ◽  
Xin Jia ◽  
Shian Zhang ◽  
Donghai Feng ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Beams ◽  
Complex Nanostructures

scholarly journals A simple correction for the parallax effect in X-ray pair distribution function measurements

2019 ◽  
Vol 52 (5) ◽  
pp. 1072-1076 ◽  
Author(s):  
Frederick Marlton ◽  
Oleh Ivashko ◽  
Martin v. Zimmerman ◽  
Olof Gutowski ◽  
Ann-Christin Dippel ◽  
...  
Keyword(s):  
Distribution Function ◽  
Rietveld Refinement ◽  
Powder Diffraction ◽  
Pair Distribution Function ◽  
Reference Data ◽  
Real Space ◽  
X Ray ◽  
Local Structures ◽  
Pdf Analysis ◽  
Complex Nanostructures

Total scattering and pair distribution function (PDF) analysis has created new insights that traditional powder diffraction methods have been unable to achieve in understanding the local structures of materials exhibiting disorder or complex nanostructures. Care must be taken in such analyses as subtle and discrete features in the PDF can easily be artefacts generated in the measurement process, which can result in unphysical models and interpretation. The focus of this study is an artefact called the parallax effect, which can occur in area detectors with thick detection layers during the collection of X-ray PDF data. This effect results in high-Q peak offsets, which subsequently cause an r-dependent shift in the PDF peak positions in real space. Such effects should be accounted for if a truly accurate model is to be achieved, and a simple correction that can be conducted via a Rietveld refinement against the reference data is proposed.

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