scholarly journals Detection analysis limit of nonlinear characteristics of DNA sensors with the surface modified by polypyrrole nanowires and gold nanoparticles

2018 ◽  
Vol 3 (2) ◽  
pp. 129-138 ◽  
Author(s):  
Pham Van Hao ◽  
Chu Thi Xuan ◽  
Pham Duc Thanh ◽  
Nguyen-Tran Thuat ◽  
Nguyen Hoang Hai ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Dna Sensors ◽  
Nonlinear Characteristics ◽  
Polypyrrole Nanowires ◽  
Detection Analysis ◽  
Surface Modified

scholarly journals Surface-Modified Titanium Dioxide Nanofibers with Gold Nanoparticles for Enhanced Photoelectrochemical Water Splitting

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 261 ◽  
Author(s):  
Van Nghia Nguyen ◽  
Minh Vuong Nguyen ◽  
Thi Hong Trang Nguyen ◽  
Minh Thuy Doan ◽  
Loan Le Thi Ngoc ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Water Splitting ◽  
Xenon Lamp ◽  
Hydrogen Energy ◽  
Au Nps ◽  
X Ray ◽  
Tio2 Nanofiber ◽  
Surface Modified

High-stability, high-efficiency, and low-cost solar photoelectrochemical (PEC) water splitting has great potential for hydrogen-energy applications. Here, we report on gold/titanium dioxide (Au/TiO2) nanofiber structures grown directly on a conductive indium tin oxide substrate, and used as photoelectrodes in PEC cells for hydrogen generation. The titanium dioxide nanofibers (TiO2 NFs) are synthesized using electrospinning, and are surface-modified by the deposition of gold nanoparticles (Au NPs) using a simple photoreduction method. The structure and morphology of the materials were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The surface plasmon resonance (SPR) of the Au NPs was investigated by ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy. The PEC properties of the as-prepared photoelectrodes were measured. The obtained photoconversion efficiency of 0.52% under simulated-sunlight illumination by a 150 W xenon lamp of the Au/TiO2 NFs structure with 15 min UV irradiation for Au NP deposition was the highest value from comparable structures. Working photoelectrode stability was tested, and the mechanism of the enhanced PEC performance is discussed.

Biocompatibility of surface-modified gold nanoparticles towards red blood cells and haemoglobin

2020 ◽  
Vol 512 ◽  
pp. 145573 ◽  
Author(s):  
Sumit Kumar ◽  
Indrani Jha ◽  
Navin Kumar Mogha ◽  
Pannuru Venkatesu
Keyword(s):  
Gold Nanoparticles ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Surface Modified

Precipitation of gold nanoparticles on the quartz surface modified by titanium (IV) butoxide

2009 ◽  
Vol 12 (4) ◽  
pp. 1479-1488 ◽  
Author(s):  
Ivan Roslov ◽  
Tatiana Boitsova ◽  
Duane Bartak
Keyword(s):  
Gold Nanoparticles ◽  
Quartz Surface ◽  
Surface Modified

scholarly journals Near-IR mediated intracellular uncaging of NO from cell targeted hollow gold nanoparticles

2015 ◽  
Vol 51 (100) ◽  
pp. 17692-17695 ◽  
Author(s):  
Elizabeth S. Levy ◽  
Demosthenes P. Morales ◽  
John V. Garcia ◽  
Norbert O. Reich ◽  
Peter C. Ford
Keyword(s):  
Prostate Cancer ◽  
Gold Nanoparticles ◽  
Gold Nanoshells ◽  
Prostate Cancer Cells ◽  
Nir Light ◽  
Near Ir ◽  
Hollow Gold Nanoshells ◽  
Hollow Gold Nanoparticles ◽  
Spatio Temporal ◽  
Surface Modified

NIR light triggers NO delivery with unprecedented spatio-temporal control inside prostate cancer cells from surface-modified hollow gold nanoshells.

Chemical functionalization and modification of surface-bound cystamine–glycine monolayers on gold nanoparticles

2008 ◽  
Vol 86 (5) ◽  
pp. 368-375 ◽  
Author(s):  
Mita Dasog ◽  
Amir Kavianpour ◽  
Matthew F Paige ◽  
Heinz-Bernhard Kraatz ◽  
Robert W.J. Scott
Keyword(s):  
Gold Nanoparticles ◽  
Au Nanoparticles ◽  
Protecting Group ◽  
Efficient Removal ◽  
Activated Esters ◽  
H Nmr ◽  
Monolayer Protected Clusters ◽  
Surface Modified ◽  
Modification Of The Surface ◽  
Post Functionalization

Herein, we report the synthesis, characterization, and post-functionalization of Au nanoparticles that have been surface-modified with glycine–cystamine (Gly-CSA) stabilizing groups. We show that Au monolayer protected clusters (MPCs) can be synthesized via the Brust–Schiffrin method using a Boc-Gly–CSA stabilizer, followed by efficient removal of the Boc protecting group with trifluoroacetic acid. The resulting Gly–CSA Au MPCs are characterized via UV–vis, TEM, and 1H NMR, and are stable in solution over long periods of time. Finally, we show that the Gly–CSA Au MPCs can be further functionalized with nearly stoichiometric yields using activated esters of stearic acid and a Bodipy dye derivative. Thus, this work provides an alternative, general approach for the modification of the surface chemistry of MPCs.Key words: gold nanoparticles, peptide stabilizers, dyes.

Uptake and Intracellular Fate of Surface-Modified Gold Nanoparticles

ACS Nano ◽  
2008 ◽  
Vol 2 (8) ◽  
pp. 1639-1644 ◽  
Author(s):  
Paola Nativo ◽  
Ian A. Prior ◽  
Mathias Brust
Keyword(s):  
Gold Nanoparticles ◽  
Surface Modified ◽  
Intracellular Fate

The Internal Structure of Macroporous Membranes and Transport of Surface-Modified Nanoparticles

2015 ◽  
Vol 21 (4) ◽  
pp. 936-945 ◽  
Author(s):  
Sang J. Lee ◽  
Kiwoong Kim ◽  
Sungsook Ahn
Keyword(s):  
Gold Nanoparticles ◽  
Internal Structure ◽  
Morphological Structure ◽  
Improve Performance ◽  
X Ray ◽  
X Ray Scattering ◽  
Cellulose Acetate Membranes ◽  
Surface Modified ◽  
Surface Modified Nanoparticles

AbstractUnderstanding the morphological structure of membranes is essential to improve performance of membrane-based applications. In this paper, macroporous membranes were investigated and two methods introduced as an alternative for characterization of stereo-structure of the membranes. We combined the use of synchrotron X-ray nanotomography and small-angle X-ray scattering to examine the internal structure of cellulose acetate membranes with studies of the capture of surface-modified gold nanoparticles within these membranes. Finally, the morphological structures of macroporous membranes were visualized and their relationships with penetration tendency of surface-modified gold nanoparticles were explained.

Particle Crystals of Surface Modified Gold Nanoparticles Grown from Water

2001 ◽  
Vol 30 (4) ◽  
pp. 372-373 ◽  
Author(s):  
Keisaku Kimura ◽  
Seiichi Sato ◽  
Hiroshi Yao
Keyword(s):  
Gold Nanoparticles ◽  
Surface Modified

scholarly journals The Deposition of Gold Nanoparticles Onto Activated Carbon

2014 ◽  
Vol 59 (3) ◽  
pp. 899-903 ◽  
Author(s):  
W. Jaworski ◽  
B. Streszewski ◽  
K. Szaciłowski ◽  
K. Pacławski
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Activated Carbon ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Precursor Solution ◽  
Surface Modified ◽  
Sem Studies

Abstract This work reports the results of spectrophotometric, dynamic light scattering (DLS) and microscopic (SEM) studies of the gold nanoparticles (AuNPs) deposition on activated carbon (AC) surface modified with primary (ethanolamine) and secondary (diethylenetriamine and triethylenetetramine) amines. It was found that this method is efficient for deposition of AuNPs from aqueous solution. However, nanoparticles change their morphology depending on the kind of amine used in experiments. On the AC surface modified with ethanolamine, the uniform spherical AuNPs were formed. In case of diethylenetriamine and triethylenetetramine application, the agglomerates of AuNPs are present. The diameter of individual AuNPs did not exceed 15 nm and was bigger as compared with the diameter of particles present in precursor solution (ca. 10 nm).

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