Optical thin films by wet chemical processing

1994 ◽  
Author(s):  
Donald R. Uhlmann ◽  
Sharnaz Motakef ◽  
Tayyab I. Suratwala ◽  
Judy E. Young ◽  
J. M. Boulton ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Processing ◽  
Wet Chemical

Nanostructured Ceramic Thin Films and Membranes by Wet Chemical Processing Methods

2006 ◽  
Vol 45 ◽  
pp. 1252-1259
Author(s):  
Jing Yu Shi ◽  
Matthew L. Mottern ◽  
Krenar Shqau ◽  
Henk Verweij
Keyword(s):  
Thin Films ◽  
Colloidal Stability ◽  
Synthesis Process ◽  
Narrow Particle Size Distribution ◽  
Chemical Processing ◽  
Organic Additives ◽  
Ambient Conditions ◽  
Ceramic Thin Films ◽  
Nanostructured Ceramic ◽  
Wet Chemical

Nanostructured ceramic thin films and membranes are used for protective or functional purposes and prepared on dense or porous substrate materials. Wet chemical methods enable cheap, low-temperature, mass-scale manufacturing routes. They produce fine-grained porous and dense micro-structures that cannot be realized otherwise. In wet-chemical processing, clean nanoparticle dispersions are deposited on the substrate at, primarily, ambient conditions. The deposition is followed by a (rapid) thermal processing treatment to remove liquids and organic additives, to convert precursors to the target composition, and to establish the final porous and dense micro-structure. In the synthesis of precursor dispersions it is very important to obtain nanoparticles with a near-isometric shape and a fairly narrow particle size distribution, without the formation of secondary (agglomerate) structures. In particular the latter requires careful control of solution and interfacial chemistry to achieve proper colloidal stability, during and after the synthesis process. Characterization of coating integrity, defect morphology and defect population is done by decoration methods, microscopy, ellipsometry and statistical methods that employ membrane transport properties.

Optimization of Superhydrophobicity at the Surface of Iron Sulfide Thin Films by a Wet Chemical Approach

2021 ◽  
pp. 111476
Author(s):  
Ghulam Murtaza ◽  
Usama Zulfiqar ◽  
Ben F. Spencer ◽  
Sai P. Venkateswaran ◽  
Firoz Alam ◽  
...  
Keyword(s):  
Thin Films ◽  
Iron Sulfide ◽  
Chemical Approach ◽  
Wet Chemical

Thermodynamical Calculations and Experimental Confirmation about the Mg-Al-Spinel Reaction Path in the Sol-Gel-Process

2006 ◽  
Vol 317-318 ◽  
pp. 135-138 ◽  
Author(s):  
Wilfried Wunderlich ◽  
Krupathi Vishista ◽  
Francis D. Gnanam ◽  
Daniel Doni Jayaseelan
Keyword(s):  
Thermal Analysis ◽  
Reaction Path ◽  
Sol Gel ◽  
Chemical Processing ◽  
Aluminium Isopropoxide ◽  
Spinel Formation ◽  
Sol Gel Process ◽  
Wet Chemical ◽  
Enthalpy Data ◽  
Good Agreement

The aim of this research is, to clarify which route the sol-gel-process is taking in the case of a Al-Mg-spinel slurry, in particular, whether the hydrolysis reaction or the spinel formation is faster and which of the intermediate hydroxide phases Al(OH)3, and Mg(OH)2, or MgO and Al2O3 or MgAl2O4H2O are formed during the spinel formation. The spinel-alloy was produced using the polymeric route during wet chemical processing. Aluminium-isopropoxide was hydrolyzed in order to form the boehmite-sol and then the same amount of magnesia was added and mixed. This sol precipitated as boehmite (AlOOH) and brucite (Mg(OH)2) after ageing for 12h as confirmed by differential thermal analysis (DTA), and differential thermal gravity (DTG) measurements. After that, the powders were subsequently annealed at 900oC for 3h in air and observed by TEM. Calculations using thermodynamic enthalpy data are in good agreement with the experiments and can be used to predict reaction paths in other system as well.

Tailored defect-induced sharp excitonic emission from microcrystalline CuI and its ab initio validation

2014 ◽  
Vol 2 (32) ◽  
pp. 6592-6600 ◽  
Author(s):  
Swati Das ◽  
Subhajit Saha ◽  
Dipayan Sen ◽  
Uttam Kumar Ghorai ◽  
Kalyan Kumar Chattopadhyay
Keyword(s):  
Thin Films ◽  
Ab Initio ◽  
Chemical Reaction ◽  
Room Temperature ◽  
Iodine Concentration ◽  
Excitonic Emission ◽  
Wet Chemical

Iodine concentration modulated free excitonic emission of CuI thin films developed by wet chemical reaction at room temperature.

Microfluidic paper-based analytical devices fabricated by low-cost photolithography and embossing of Parafilm®

Lab on a Chip ◽  
2015 ◽  
Vol 15 (7) ◽  
pp. 1642-1645 ◽  
Author(s):  
Ling Yu ◽  
Zhuan Zhuan Shi
Keyword(s):  
Low Cost ◽  
Chemical Processing ◽  
Wet Chemical

The combination of photolithography-patterning and embossing of a Parafilm® can fabricate microfluidic paper-based analytical devices (μPADs) without the use of a wax printer, cutter plotter and wet-chemical processing of paper.

Patterning of Bi-Sr-Ca-Cu-O thin films by wet chemical etching in EDTA

1992 ◽  
pp. 587-591
Author(s):  
F.J. Müller ◽  
J C Gallop ◽  
J.R. Laverty ◽  
M.A. Angadi ◽  
A.D. Caplin ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Etching ◽  
Wet Chemical ◽  
Wet Chemical Etching
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