Aminopropyltriethoxysilane (APTES)-functionalized nanoporous polymeric gratings: fabrication and application in biosensing

Hsiao, Vincent K. S.; Waldeisen, John R.; Zheng, Yuebing; Lloyd, Pamela F.; Bunning, Timothy J.; Huang, Tony Jun

doi:10.1039/b711200a

Cited by 96 publications

(68 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[34][35][36]69 Hydroxyl groups exposed on the surface of HNO 3 -pretreated carbon cloth electrode are expected to covalently bind APTES to the electrode surface (Scheme 1C). Evidence for the attachment of APTES to the carbon cloth was provided by the appearance of two edges at 192.8 and 101.6 eV arising from the Si 2s and Si 2p, as well as N 1s edge (400 eV), in the XPS spectra aer surface modication (Fig.…”

Section: 63mentioning

confidence: 99%

Improved cathode materials for microbial electrosynthesis

Zhang

Nie

Bain

et al. 2013

Energy Environ. Sci.

351

298

View full text Add to dashboard Cite

Microbial electrosynthesis is a promising strategy for the microbial conversion of carbon dioxide to transportation fuels and other organic commodities, but optimization of this process is required for commercialization. Cathodes which enhance electrode-microbe electron transfer might improve rates of product formation. To evaluate this possibility, biofilms of Sporomusa ovata, which are effective in acetate electrosynthesis, were grown on a range of cathode materials and acetate production was monitored over time. Modifications of carbon cloth that resulted in a positive-charge enhanced microbial electrosynthesis. Functionalization with chitosan or cyanuric chloride increased acetate production rates 6-7 fold and modification with 3-aminopropyltriethoxysilane gave rates 3-fold higher than untreated controls. A 3-fold increase in electrosynthesis over untreated carbon cloth cathodes was also achieved with polyaniline cathodes. However, not all strategies to provide positively charged surfaces were successful, as treatment of carbon cloth with melamine or ammonia gas did not stimulate acetate electrosynthesis. Treating carbon cloth with metal, in particular gold, palladium, or nickel nanoparticles, also promoted electrosynthesis, yielding electrosynthesis rates that were 6-, 4.7-or 4.5-fold faster than the untreated control, respectively. Cathodes comprised of cotton or polyester fabric treated with carbon nanotubes yielded cathodes that supported acetate electrosynthesis rates that were $3-fold higher than carbon cloth controls. Recovery of electrons consumed in acetate was $80% for all materials. The results demonstrate that one approach to increase rates of carbon dioxide reduction in microbial electrosynthesis is to modify cathode surfaces to improve microbe-electrode interactions. Broader contextMicrobial electrosynthesis is a recently conceived bioenergy strategy in which microorganisms use electrons derived from electrodes to reduce carbon dioxide to organic products that are excreted from the cells. Any form of electrical energy can power microbial electrosynthesis, but when electricity is obtained from solar technologies and water is the source of electrons, microbial electrosynthesis is an articial form of photosynthesis with many potential advantages over biomassbased energy strategies. This study demonstrates that there are several strategies for modifying cathode surface properties that can enhance rates of microbial electrosynthesis.

show abstract

Section: 63mentioning

confidence: 99%

Improved cathode materials for microbial electrosynthesis

Zhang

Nie

Bain

et al. 2013

Energy Environ. Sci.

351

298

View full text Add to dashboard Cite

show abstract

“…[30,[33][34][35] with amino groups, which allows further immobilization of a large variety of organic molecules. Theoretically, surface functionalization with APTES should afford a homogeneous coupling between surface OH groups and silanols from hydrolysed APTES ( figure 1a).…”

Section: Resultsmentioning

confidence: 99%

“…Amine functional groups are extensively used for surface functionalization because they are quite versatile and particularly suited for condensation reaction to the corresponding amides; in this respect, (3-aminopropyl)triethoxysilane (APTES) is one of the most widely used reagents. The silanol groups at one end of hydrolysed APTES can form a binding with OH groups exposed on the material surface, while its amine group can be exploited for further covalent derivatization with organic (bio)molecules [29,30]. While the mechanism of the silanol condensation is pretty well established [31,32], no detailed comparative studies on the efficacy of aminosilane grafting on bioceramics in different reaction conditions have been performed to date.…”

Section: Introductionmentioning

confidence: 99%

Carbonate hydroxyapatite functionalization: a comparative study towards (bio)molecules fixation

et al. 2014

View full text Add to dashboard Cite

show abstract

“…However, the ability to achieve large surface relief amplitudes at high spatial frequency is governed by the properties of the holographic recording medium. The use of SRG [10][11][12], and recently more complex diffractive optical elements [13] as sensors have been previously successfully implemented and reported. Analyte induced change of the surface relief amplitude and/or refractive index modulation have been utilized as detection mechanisms.…”

Section: Surface Relief Structures and Their Application In Sensingmentioning

confidence: 99%

LTL type nanozeolites utilized in surface photonics structures for environmental sensors

Gul

Cody

Kharchenko

et al. 2018

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

A B S T R A C TEnvironmental monitoring has been continuously increasing due to an emerging global emphasis on the importance of sustainable development. Improving water quality monitoring and control is a challenge that calls for innovative solutions. Current methods of water monitoring are costly and analytical techniques suitable for field use are limited. There is a need for accurate, long-term monitoring of environmental contaminants using sensors that can be operated on site. The aim of our research is to theoretically model, fabricate and characterise holographic sensors for water quality monitoring that are simple to operate, capable of sensing copper present in fresh water and have relatively low cost. The sensors are created by holographic recording of surface relief gratings (SRG) in a self-processing photopolymer material. Interrogation of these structures by light allows indirect measurements of ion concentration in real time. The SRG structures are modified by coating with porous LTL-nanoparticles (nanosized zeolites) which selectively adsorb copper ions. The suitability of the sensors for detection of copper (II) present in water at concentration levels 1-4 mM is reported. The current detection limit of the sensor is 63 ppm.

show abstract

Aminopropyltriethoxysilane (APTES)-functionalized nanoporous polymeric gratings: fabrication and application in biosensing

Cited by 96 publications

References 70 publications

Improved cathode materials for microbial electrosynthesis

Improved cathode materials for microbial electrosynthesis

Carbonate hydroxyapatite functionalization: a comparative study towards (bio)molecules fixation

LTL type nanozeolites utilized in surface photonics structures for environmental sensors

Contact Info

Product

Resources

About