Use of atomic layer deposition to improve the stability of silver substrates forin situ, high-temperature SERS measurements

2010 ◽  
Vol 41 (1) ◽  
pp. 4-11 ◽  
Author(s):  
Joshy F. John ◽  
Shannon Mahurin ◽  
Sheng Dai ◽  
Michael J. Sepaniak
Nano Express ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 010025
Author(s):  
Xudong Wu ◽  
Shaokai Tang ◽  
Guanghui Song ◽  
Zihan Zhang ◽  
Daniel Q Tan

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2434
Author(s):  
Aaron J. Austin ◽  
Elena Echeverria ◽  
Phadindra Wagle ◽  
Punya Mainali ◽  
Derek Meyers ◽  
...  

Silica nanosprings (NS) were coated with gallium nitride (GaN) by high-temperature atomic layer deposition. The deposition temperature was 800 °C using trimethylgallium (TMG) as the Ga source and ammonia (NH3) as the reactive nitrogen source. The growth of GaN on silica nanosprings was compared with deposition of GaN thin films to elucidate the growth properties. The effects of buffer layers of aluminum nitride (AlN) and aluminum oxide (Al2O3) on the stoichiometry, chemical bonding, and morphology of GaN thin films were determined with X-ray photoelectron spectroscopy (XPS), high-resolution x-ray diffraction (HRXRD), and atomic force microscopy (AFM). Scanning and transmission electron microscopy of coated silica nanosprings were compared with corresponding data for the GaN thin films. As grown, GaN on NS is conformal and amorphous. Upon introducing buffer layers of Al2O3 or AlN or combinations thereof, GaN is nanocrystalline with an average crystallite size of 11.5 ± 0.5 nm. The electrical properties of the GaN coated NS depends on whether or not a buffer layer is present and the choice of the buffer layer. In addition, the IV curves of GaN coated NS and the thin films (TF) with corresponding buffer layers, or lack thereof, show similar characteristic features, which supports the conclusion that atomic layer deposition (ALD) of GaN thin films with and without buffer layers translates to 1D nanostructures.


2018 ◽  
Vol 924 ◽  
pp. 486-489 ◽  
Author(s):  
Muhammad I. Idris ◽  
Nick G. Wright ◽  
Alton B. Horsfall

This paper reports on the effect of forming gas annealing on the C-V characteristics and stability of Al2O3/SiC MOS capacitors deposited by atomic layer deposition, (ALD). C-V and I-V measurements were performed to assess the quality of the Al2O3 layer and the Al2O3/SiC interface. In comparison to as-deposited sample, the post oxide annealing (POA) in forming gas at high temperatures has improved the stability of C-V characteristic and the properties at the interface of Al2O3/SiC capacitors. However, the oxide capacitance and oxide breakdown electric field degrade with increased annealing temperature. The results provide indications to improve the performance of Al2O3/SiCcapacitors 4H-SiC devices by optimizing the annealing temperature.


2016 ◽  
Vol 52 (63) ◽  
pp. 9817-9820 ◽  
Author(s):  
Peng Zhang ◽  
Jingjing Tong ◽  
Youngseok Jee ◽  
Kevin Huang

A high-selectivity and high-flux electrochemical silver-carbonate dual-phase membrane was coated with a nanoscaled ZrO2 layer by atomic layer deposition (ALD) for stable CO2 capture at high temperatures (≥800 °C).


Nano Letters ◽  
2013 ◽  
Vol 13 (11) ◽  
pp. 5727-5734 ◽  
Author(s):  
Jian Shi ◽  
Zhaodong Li ◽  
Alexander Kvit ◽  
Sergiy Krylyuk ◽  
Albert V. Davydov ◽  
...  

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