Improved Stability of Porous Silicon in Aqueous Media via Atomic Layer Deposition of Oxides

2017 ◽  
Vol 122 (1) ◽  
pp. 331-338 ◽  
Author(s):  
Jonathan Rasson ◽  
Laurent A. Francis
Keyword(s):  
Porous Silicon ◽  
Atomic Layer Deposition ◽  
Aqueous Media ◽  
Atomic Layer ◽  
Layer Deposition ◽  
Improved Stability

scholarly journals Atomic layer deposition for efficient oxygen evolution reaction at Pt/Ir catalyst layers

2020 ◽  
Vol 11 ◽  
pp. 952-959
Author(s):  
Stefanie Schlicht ◽  
Korcan Percin ◽  
Stefanie Kriescher ◽  
André Hofer ◽  
Claudia Weidlich ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Noble Metal ◽  
Bimetallic Catalyst ◽  
Precursor Solution ◽  
Atomic Layer ◽  
Dip Coating ◽  
Experimental Conditions ◽  
Catalyst Layers ◽  
Layer Deposition ◽  
Improved Stability

We provide a direct comparison of two distinct methods of Ti felt surface treatment and Pt/Ir electrocatalyst deposition for the positive electrode of regenerative fuel cells and vanadium–air redox flow batteries. Each method is well documented in the literature, and this paper provides a direct comparison under identical experimental conditions of electrochemical measurements and in identical units. In the first method, based on classical engineering, the bimetallic catalyst is deposited by dip-coating in a precursor solution of the salts followed by their thermal decomposition. In the alternative method, more academic in nature, atomic layer deposition (ALD) is applied to the felts after anodization. ALD allows for a controlled coating with ultralow noble-metal loadings in narrow pores. In acidic electrolyte, the ALD approach yields improved mass activity (557 A·g−1 as compared to 80 A·g−1 at 0.39 V overpotential) on the basis of the noble-metal loading, as well as improved stability.

Atomic Layer Deposition for Improved Stability of Catalysts for the Conversion of Biomass to Chemicals and Fuels

2011 ◽  
Vol 1366 ◽  
Author(s):  
Monika K. Wiedmann ◽  
Yomaira J. Pagan-Torres ◽  
Mark H. Tucker ◽  
James A. Dumesic ◽  
T. F. Kuech
Keyword(s):  
Atomic Layer Deposition ◽  
Metal Oxides ◽  
Rate Constant ◽  
Flow Reactor ◽  
Atomic Layer ◽  
Deactivation Rate ◽  
Layer Deposition ◽  
Improved Stability ◽  
Deactivation Rate Constant ◽  
Acid Catalyzed

ABSTRACTAtomic layer deposition (ALD) has been used to coat SBA-15 and functionalized SBA-15 with various metal oxides. Use of SBA-15 coated with 4-10 ALD cycles of titania, alumina, niobia, or zirconia in the acid-catalyzed dehydration of fructose to 5-hydroxymethylfurfural (HMF) resulted in 24-57% conversion, with 0-22% selectivity, at 130 °C with 2 wt % fructose in 4:1 THF:H2O. Propylsulfonic acid functionalized SBA-15 (SBA-15-PrSO3H) had a 25% conversion and 48% selectivity for HMF under the same conditions. SBA-15-PrSO3H was also coated with 2 ALD cycles of titania followed by 8 ALD cycles silica. The deactivation rate constant for SBA-15-PrSO3H was 2.7 x 10-2 h-1 for the dehydration of fructose to HMF in a flow reactor at 130 °C with a feed of 2 wt % fructose in 4:1 THF:H2O. In comparison, the deactivation rate constant for the ALD coated SBA-15-PrSO3H-ALD was 7.9 x 10-3 h-1.

scholarly journals Porous Silicon-Zinc Oxide Nanocomposites Prepared by Atomic Layer Deposition for Biophotonic Applications

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1987 ◽  
Author(s):  
Mykola Pavlenko ◽  
Valerii Myndrul ◽  
Gloria Gottardi ◽  
Emerson Coy ◽  
Mariusz Jancelewicz ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Porous Silicon ◽  
Atomic Layer Deposition ◽  
Photoelectron Spectroscopy ◽  
Atomic Layer ◽  
Visible Range ◽  
Optical Biosensing ◽  
X Ray ◽  
Layer Deposition

In the current research, a porous silicon/zinc oxide (PSi/ZnO) nanocomposite produced by a combination of metal-assisted chemical etching (MACE) and atomic layer deposition (ALD) methods is presented. The applicability of the composite for biophotonics (optical biosensing) was investigated. To characterize the structural and optical properties of the produced PSi/ZnO nanocomposites, several studies were performed: scanning and transmission electron microscopy (SEM/TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance, and photoluminescence (PL). It was found that the ALD ZnO layer fully covers the PSi, and it possesses a polycrystalline wurtzite structure. The effect of the number of ALD cycles and the type of Si doping on the optical properties of nanocomposites was determined. PL measurements showed a “shoulder-shape” emission in the visible range. The mechanisms of the observed PL were discussed. It was demonstrated that the improved PL performance of the PSi/ZnO nanocomposites could be used for implementation in optical biosensor applications. Furthermore, the produced PSi/ZnO nanocomposite was tested for optical/PL biosensing towards mycotoxins (Aflatoxin B1) detection, confirming the applicability of the nanocomposites.

scholarly journals Ultrafast triggered transient energy storage by atomic layer deposition into porous silicon for integrated transient electronics

Nanoscale ◽  
2016 ◽  
Vol 8 (14) ◽  
pp. 7384-7390 ◽  
Author(s):  
Anna Douglas ◽  
Nitin Muralidharan ◽  
Rachel Carter ◽  
Keith Share ◽  
Cary L. Pint
Keyword(s):  
Energy Storage ◽  
Porous Silicon ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Layer Deposition ◽  
Transient Energy ◽  
Transient Electronics

scholarly journals Improved Stability of Polymer Solar Cells in Ambient Air via Atomic Layer Deposition of Ultrathin Dielectric Layers

2017 ◽  
Vol 4 (18) ◽  
pp. 1700231 ◽  
Author(s):  
Ermioni Polydorou ◽  
Martha A. Botzakaki ◽  
Ilias Sakellis ◽  
Anastasia Soultati ◽  
Andreas Kaltzoglou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Atomic Layer Deposition ◽  
Polymer Solar Cells ◽  
Atomic Layer ◽  
Ambient Air ◽  
Dielectric Layers ◽  
Layer Deposition ◽  
Improved Stability

Structural and morphological characterization of Al2O3 coated macro-porous silicon by atomic layer deposition

2016 ◽  
Vol 616 ◽  
pp. 628-634 ◽  
Author(s):  
Sridhar Sampath ◽  
Philipp Maydannik ◽  
Tatiana Ivanova ◽  
Tomáš Homola ◽  
Mika Sillanpää ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Morphological Characterization ◽  
Layer Deposition

Atomic layer deposition TiO2 coated porous silicon surface: Structural characterization and morphological features

2015 ◽  
Vol 589 ◽  
pp. 303-308 ◽  
Author(s):  
Igor Iatsunskyi ◽  
Mariusz Jancelewicz ◽  
Grzegorz Nowaczyk ◽  
Mateusz Kempiński ◽  
Barbara Peplińska ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Atomic Layer Deposition ◽  
Structural Characterization ◽  
Silicon Surface ◽  
Atomic Layer ◽  
Morphological Features ◽  
Porous Silicon Surface ◽  
Layer Deposition

Efficient solar photocatalytic activity of TiO2 coated nano-porous silicon by atomic layer deposition

2016 ◽  
Vol 97 ◽  
pp. 155-166 ◽  
Author(s):  
Sridhar Sampath ◽  
Philipp Maydannik ◽  
Tatiana Ivanova ◽  
Marina Shestakova ◽  
Tomáš Homola ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Porous Silicon ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Layer Deposition ◽  
Solar Photocatalytic Activity
Sign in / Sign up

Export Citation Format

Share Document