Surface Modification of Inorganic Nanoparticles by Organic Functional Groups

2018 ◽  
pp. 809-812
Author(s):  
Seiichi Takami
Keyword(s):  
Surface Modification ◽  
Functional Groups ◽  
Inorganic Nanoparticles ◽  
Organic Functional Groups

MILLING EFFECT AND ENHANCED LUMINESCENCE PROPERTY OF BAM NANOPHOSPHOR VIA SURFACE MODIFICATIONS

NANO ◽  
2009 ◽  
Vol 04 (06) ◽  
pp. 367-370 ◽  
Author(s):  
A. DULDA ◽  
D. S. JO ◽  
M. TAKAKI ◽  
D. H. YOON
Keyword(s):  
Surface Modification ◽  
Functional Groups ◽  
Luminescence Intensity ◽  
Surface Defects ◽  
Solution Treatment ◽  
Efficiency Improvement ◽  
Luminescence Efficiency ◽  
Treated Sample ◽  
Dispersion Agent ◽  
Organic Functional Groups

Surface modification of luminescent nanomaterials has attracted considerable technological interest. With decreasing particle size, the passivation of surface defects is of vital importance. This paper reports the effect of an alkali (KOH) solution treatment and organic functional groups on the luminescence efficiency and particle dispersibility. Fourier transform infrared spectroscopy provided clear evidence of surface modification with organic functional groups from the C=O , C–H , and C–O stretching modes at 1740, 1365, and 1218 cm-1. The KOH-treated sample showed a 40% increase in luminescence intensity, whereas 87% increase in luminescence intensity was obtained from the dispersion-agent-containing sample. To the best of our knowledge, this is the highest efficiency improvement for sub-micrometer-sized BAM: Eu2+ phosphors reported thus far.

Preparation of highly controlled nanostructured Au within mesopores using reductive deposition in non-polar environments

RSC Advances ◽  
2014 ◽  
Vol 4 (52) ◽  
pp. 27201-27206 ◽  
Author(s):  
Masaki Kitahara ◽  
Kazuyuki Kuroda
Keyword(s):  
Surface Modification ◽  
Mesoporous Silica ◽  
Functional Groups ◽  
Organic Functional Groups ◽  
Unique Method ◽  
Conventional Methods

We demonstrate a sophisticated and unique method of Au deposition exclusively inside mesoporous silica, in clear contrast to conventional methods requiring surface modification with organic functional groups interacting with Au.

Surface Modification of Nano-TiO2 by Titanate Coupling Agent

2012 ◽  
Vol 538-541 ◽  
pp. 350-353 ◽  
Author(s):  
Shou Wu Yu ◽  
Shu Juan Xiao ◽  
Xiao Ming Sang ◽  
Gui Xiang Hou
Keyword(s):  
Surface Modification ◽  
Tio2 Nanoparticles ◽  
Functional Groups ◽  
Coupling Agent ◽  
Ftir Spectrum ◽  
Sem Micrographs ◽  
Organic Functional Groups ◽  
20 Nm ◽  
Commercial Tio2

The surface of commercial TiO2 nanoparticles was modified by titanate coupling agent, JSC(isopropyl tricarboxytate titanate), FTIR spectrum confirmed that organic functional groups were successfully grafted onto the surface of TiO2 nanoparticles. The SEM micrographs indicated that the aggregation of modified TiO2 was reduced and most of the particles were approximately 20 nm.

The Swiss army knife of biological catalysis: A compact toolkit of organic functional groups

Complexity ◽  
2006 ◽  
Vol 11 (3) ◽  
pp. 9-10 ◽  
Author(s):  
Harold J. Morowitz ◽  
Vijayasarathy Srinivasan ◽  
Eric Smith
Keyword(s):  
Functional Groups ◽  
Organic Functional Groups ◽  
Biological Catalysis

Colorimetric methods for determining organic functional groups. II

1969 ◽  
Vol 57 (4) ◽  
pp. 821-825 ◽  
Author(s):  
Walter L. Nazimowitz ◽  
T. S. Ma
Keyword(s):  
Functional Groups ◽  
Organic Functional Groups ◽  
Colorimetric Methods

Surface Modification of Asymmetric Polysulfone Membrane by UV Irradiation

2014 ◽  
Vol 70 (2) ◽  
Author(s):  
Sutthisa Konruang ◽  
Thawat Chittrakarn ◽  
Suksawat Sirijarukul
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Functional Groups ◽  
Uv Irradiation ◽  
Water Flux ◽  
Inversion Method ◽  
Asymmetric Structure ◽  
Polysulfone Membrane ◽  
Polar Functional Groups ◽  
Polysulfone Membranes

The effects of ultraviolet (UV) irradiation for surface modification of hydrophobic asymmetric polysulfone membranes have been investigated. The asymmetric polysulfone (PSF) membranes were prepared by phase inversion method using 19%-25% of PSF in two solvents, viz. dimethylacetamide (DMF) and Acetone (Ac) collectively. The surface of asymmetric polysulfone membranes were modified by UV ray with 254 and 312 nm wavelength. Chemical and physical properties of the untreated and the treated membranes were characterized. Scanning electron microscope (SEM) was used to determine asymmetric structure of polysulfone membranes. Contact angle device was used to analyzed the effected of UV ray treatment on hydrophilicity of membranes surface. Polar functional groups introduced by UV irradiation were examined using FTIR. The water flux was measured under a pressure of 500 kPa to 2,500 kPa with a feed temperature of 25°C. It was shown that asymmetric polysulfone membranes were produced and the UV ray treatment significantly alters the hydrophilicity of membranes surface indicated by the reduction of water contact angle with increasing treatment time. The FTIR analysis showed the formations of polar functional groups such as hydroxyl and carbonyl groups. Consequently, the surface of asymmetric polysulfone membranes was changed from hydrophobic to hydrophilic by UV irradiation leading to the enhancement of the water flux.

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