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Surface modification
About: Surface modification is a research topic. Over the lifetime, 35544 publications have been published within this topic receiving 859567 citations.
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TL;DR: In this article, the effect of the spacer length between the two charged groups on the nonfouling properties of zwitterionic poly(carboxybetaine acrylamide) (polyCBAA) was studied in blood plasma and serum.
173 citations
TL;DR: By intelligently exploiting both nano- and microchemical architectures and wiring up the electroactive centers using MWCNTs in this way, it is demonstrated that macroelectrode voltammetric behavior is obtained while only using approximately 1% by mass of the expensive gold material that would be required to construct the equivalent gold film macrodisk electrode.
Abstract: Gold nanoparticles (∼30−60 nm in diameter) were deposited onto the surface of glassy carbon microspheres (10−20 μm) through electroless plating to produce bulk (i.e., gram) quantities of nanoparticle surface-modified microspheres. The gold nanoparticle-modified powder was then characterized by means of scanning electron microscopy and cyclic voltammetry. The voltammetric response of a macroelectrode consisting of a film of gold nanoparticle-modified glassy carbon microspheres, bound together and “wired-up” using multiwalled carbon nanotubes (MWCNTs), was investigated. We demonstrate that by intelligently exploiting both nano- and microchemical architectures and wiring up the electroactive centers using MWCNTs in this way, we can obtain macroelectrode voltammetric behavior while only using ∼1% by mass of the expensive gold material that would be required to construct the equivalent gold film macrodisk electrode. The potential utility of electrodes constructed using chemical architectures such as this was d...
173 citations
TL;DR: A novel and simple method for the preparation of chemically functionalized boron nitride nanotubes (BNNTs) is presented and in vitro biocompatibility and cellular up-take of the functionalized BNNTs are demonstrated.
173 citations
TL;DR: This critical review of recent developments in the methods of preparing Au@ MNPs, surface functionalization and their application in analytical sensing and biomedicine highlights some of the remaining major challenges, as well as the lessons learnt when working with Au@MNPs.
172 citations
TL;DR: In this paper, the capability of adsorption of dyes on carbon nanotubes and functionalized CNTs has been compiled, and data about defects, ad-sorption sites on CNT, and adorption process studies under the effect of such various operational parameters as solution pH, contact time, and temperature.
Abstract: For the removal and separation of wastewater pollutants, one widely used technique is adsorption. Different materials have been used as adsorbents. Among several adsorbents, carbon nanotubes (CNTs) are emerging as potential adsorbents because of their large surface area, defined cylindrical hollow structure, high ratio aspect, easy modification and hydrophobic wall surfaces. In this review, the capability of adsorption of dyes on CNTs and functionalized CNTs has been compiled. This paper provides data about defects, adsorption sites on CNTs and adsorption process studies under the effect of such various operational parameters as solution pH, contact time, and temperature, and deals with the mechanisms involved in the adsorption of dyes onto CNTs. According to observations from the articles reviewed, functionalized carbon nanotubes have better sorption capacity than as-grown CNTs. For the removal of dyes from aqueous solution, carbon nanotubes (CNTs) have shown good potential and some of the functional groups improve the adsorption potential according to evidence from the literature. For example, the maximum adsorption amount (qmax) of methylene blue dye on an MWCNT surface has been reported to be 100 mg g−1 while the maximum adsorption amount of methylene blue dye on functionalized MWCNT–SH surface was 166.7 mg g−1. This indicates that functionalization is beneficial in increasing the amounts of absorption. However, the development of highly efficient, cost effective environmentally friendly CNT-based nano adsorbents for their commercial applications should be the focus of still more study.
172 citations