Surface chemical modification of TEOS based silica aerogels synthesized by two step (acid–base) sol–gel process

2006 ◽  
Vol 252 (12) ◽  
pp. 4289-4297 ◽  
Author(s):  
Sharad D. Bhagat ◽  
A. Venkateswara Rao
Keyword(s):  
Chemical Modification ◽  
Sol Gel ◽  
Silica Aerogels ◽  
Surface Chemical ◽  
Acid Base ◽  
Sol Gel Process ◽  
Surface Chemical Modification

Surface chemical modification of silica aerogels using various alkyl-alkoxy/chloro silanes

2003 ◽  
Vol 206 (1-4) ◽  
pp. 262-270 ◽  
Author(s):  
A.Venkateswara Rao ◽  
Manish M. Kulkarni ◽  
D.P. Amalnerkar ◽  
Tanay Seth
Keyword(s):  
Chemical Modification ◽  
Silica Aerogels ◽  
Surface Chemical ◽  
Surface Chemical Modification

scholarly journals Sputtering yields and surface chemical modification of tin-doped indium oxide in hydrocarbon-based plasma etching

2015 ◽  
Vol 33 (6) ◽  
pp. 060606 ◽  
Author(s):  
Hu Li ◽  
Kazuhiro Karahashi ◽  
Masanaga Fukasawa ◽  
Kazunori Nagahata ◽  
Tetsuya Tatsumi ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Indium Oxide ◽  
Plasma Etching ◽  
Surface Chemical ◽  
Sputtering Yields ◽  
Surface Chemical Modification

The facile surface chemical modification of a single glass nanopore and its use in the nonenzymatic detection of uric acid

2015 ◽  
Vol 51 (10) ◽  
pp. 1914-1917 ◽  
Author(s):  
Haili He ◽  
Xiaolong Xu ◽  
Ping Wang ◽  
Lizhen Chen ◽  
Yongdong Jin
Keyword(s):  
Uric Acid ◽  
Chemical Modification ◽  
Chemical Method ◽  
Surface Chemical ◽  
Enzymatic Detection ◽  
Surface Chemical Modification

A single glass nanopore was modified with gold through a facile chemical method and used for the non-enzymatic detection of uric acid.

Stabilization of Porous Silicon Free-Standing Coupled Optical Microcavities by Surface Chemical Modification

2019 ◽  
Vol 16 (3) ◽  
pp. 211-219 ◽  
Author(s):  
Bernard Gelloz ◽  
Kouichiro Murata ◽  
Toshiyuki Ohta ◽  
Mher Ghulinyan ◽  
Lorenzo Pavesi ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Chemical Modification ◽  
Surface Chemical ◽  
Free Standing ◽  
Optical Microcavities ◽  
Surface Chemical Modification

scholarly journals The Effect of Two-Stage Acid Treatment on Surface Behavior and Improvement of Bioactivity of Nitinol Alloy

2020 ◽  
Vol 11 (3) ◽  
pp. 10690-10702
Keyword(s):  
Surface Roughness ◽  
Chemical Modification ◽  
Surface Chemistry ◽  
Healing Process ◽  
In Vitro Study ◽  
Surface Chemical ◽  
Two Stage ◽  
Nitinol Alloy ◽  
Surface Chemical Modification

Surface properties, including morphology, submicron morphology, and surface chemistry, are essential factors that affect the quality and manner of biological responses at the site of tissue contact with the implant, affecting the bone healing process. In this in vitro study, morphology and biocompatibility of nitinol (NiTi) memory alloy surfaces mechanically polished and modified with a chemical solution consisting of three types of acid (HCl-HF-H3PO4) and then chemical operations in solution (HNO3 and HCl) with a Volumetric scale of 1:1 and examined at ambient temperature. 75 samples were used for surface chemical modification, biological evaluations, and surface roughness, and also 9 samples as control. Scanning electron microscopy (SEM), atomic force microscopy (AFM), and nitinol alloy (NiTi) surface roughness measurements were performed to analyze the surfaces. Besides, MG-63 cells were cultured on different nitinol alloy levels to evaluate adhesion and cell growth and proliferation. Data were analyzed using t-test and one-way analysis of variance. The results show that the chemical surface modification operation with two-stage acid solution had a higher roughness compared to the unmodified surfaces and the surface chemical modification operation with the acidic solution with an only solution consisting of (HCl-HF-H3PO4). Cell culture evaluations also showed that the two-stage modified nitinol levels showed significant cell adhesion and significant growth and proliferation compared to the tertiary acid-modified and unmodified levels. The surface chemical modification method for nitinol alloy can change the surface chemistry and change the surface morphology and create sub-micron scale roughness. This can increase the connectivity of the implant tissue and reduce the toxic effect of nickel.

Topological surface states of Bi2Te2Se are robust against surface chemical modification

2014 ◽  
Vol 8 (12) ◽  
pp. 997-1002 ◽  
Author(s):  
Conor R. Thomas ◽  
Girija Sahasrabudhe ◽  
Satya Kumar Kushwaha ◽  
Jun Xiong ◽  
Robert J. Cava ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Surface States ◽  
Surface Chemical ◽  
Topological Surface ◽  
Surface Chemical Modification
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