نتایج جستجو برای: chemical stability

تعداد نتایج: 662044  

2017
Van Hoang Luan Huynh Ngoc Tien Seung Hyun Hur Jong Hun Han Wonoh Lee

Nickel oxide has been widely used in chemical sensing applications, because it has an excellent p-type semiconducting property with high chemical stability. Here, we present a novel technique of fabricating three-dimensional porous nitrogen-doped nickel oxide nanosheets as a highly sensitive NO₂ sensor. The elaborate nanostructure was prepared by a simple and effective hydrothermal synthesis me...

2016
Qi Sun Hongming He Wen-Yang Gao Briana Aguila Lukasz Wojtas Zhifeng Dai Jixue Li Yu-Sheng Chen Feng-Shou Xiao Shengqian Ma

The sophisticated control of surface wettability for target-specific applications has attracted widespread interest for use in a plethora of applications. Despite the recent advances in modification of non-porous materials, surface wettability control of porous materials, particularly single crystalline, remains undeveloped. Here we contribute a general method to impart amphiphobicity on single...

2014
Jiping Zhu Rui Duan Sheng Zhang Nan Jiang Yangyang Zhang Jie Zhu

Graphene is composed of a single atomic layer of carbon which has excellent mechanical, electrical and optical properties. It has the potential to be widely used in the fields of physics, chemistry, information, energy and device manufacturing. In this paper, we briefly review the concept, structure, properties, preparation methods of graphene and its application in lithium ion batteries. A con...

2011
Hongwen Liu Ling Zhang Xingyou Lang Yoshinori Yamaguchi Hiroshi Iwasaki Yasushi Inouye Qikun Xue Mingwei Chen

Detecting and identifying single molecules are the ultimate goal of analytic sensitivity. Single molecule detection by surface-enhanced Raman scattering (SM-SERS) depends predominantly on SERS-active metal substrates that are usually colloidal silver fractal clusters. However, the high chemical reactivity of silver and the low reproducibility of its complicated synthesis with fractal clusters h...

Journal: :Molecules 2013
Navideh Anarjan Imededdine Arbi Nehdi Chin Ping Tan

The protective effects of α-tocopherol and ascorbic acid on astaxanthin in astaxanthin nanodispersions produced via a solvent-diffusion technique and stabilized by a three-component stabilizer system, were studied either individually or in combination by using response surface methodology. Generally, both α-tocopherol and ascorbic acid could retard the astaxanthin degradation in astaxanthin nan...

Journal: :Chemphyschem : a European journal of chemical physics and physical chemistry 2010
Emeline Descamps Khoa Nguyen Christelle Bouchain-Gautier Arianna Filoramo Laurence Goux-Capes Marcello Goffman Jean-Philippe Bourgoin Pascal Mailley Thierry Livache

Surface modification at the nanometer scale is a challenge for the future of molecular electronics. In particular, the precise anchoring and electrical addressing of biological scaffolds such as complex DNA nanonetworks is of importance for generating bio-directed assemblies of nano-objects for nanocircuit purposes. Herein, we consider the individual modification of nanoelectrodes with differen...

Journal: :Science 2015
Francesco Bonaccorso Luigi Colombo Guihua Yu Meryl Stoller Valentina Tozzini Andrea C Ferrari Rodney S Ruoff Vittorio Pellegrini

Graphene and related two-dimensional crystals and hybrid systems showcase several key properties that can address emerging energy needs, in particular for the ever growing market of portable and wearable energy conversion and storage devices. Graphene's flexibility, large surface area, and chemical stability, combined with its excellent electrical and thermal conductivity, make it promising as ...

Journal: :Organic & biomolecular chemistry 2008
Maria Duca Shengxi Chen Sidney M Hecht

Tandemly activated tRNAs, bearing amino acid moieties at both the 2'- and 3'-positions of the 3'-terminal adenosine moiety (A(76)), have been shown to participate efficiently in protein synthesis [B. Wang, J. Zhou, M. Lodder, R. D. Anderson, III and S. M. Hecht, J. Biol. Chem., 2006, 281, 13865]. The mechanism by which such activated tRNAs are able to donate both amino acids to the growing poly...

Journal: :The Analyst 2014
A K Buchowiecka

Cysteine phosphorylation has recently been discovered in both prokaryotic and eukaryotic systems, and is thought to play crucial roles in signaling and regulation of cellular responses. This article explores the topics of chemical stability of this type of structural modification and the resulting issues regarding affinity enrichment of S-phosphopeptides and their mass spectrometry-based detect...

Journal: :Nanoscale 2012
Jaswinder Sharma Reginaldo C Rocha M Lisa Phipps Hsin-Chih Yeh Kirill A Balatsky Dung M Vu Andrew P Shreve James H Werner Jennifer S Martinez

We report the discovery of a DNA sequence that templates a highly stable fluorescent silver nanocluster. In contrast to other DNA templated silver nanoclusters that have a relatively short shelf-life, the fluorescent species templated in this new DNA sequence retains significant fluorescence for at least a year. Moreover, this new silver nanocluster possesses low cellular toxicity and enhanced ...

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