Chemical Routes in the Synthesis of Nanomaterials Using the Sol—Gel Process

Mackenzie, John D.; Bescher, Eric P.

doi:10.1002/chin.200750253

Cited by 22 publications

(27 citation statements)

References 1 publication

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“…Many different types of stabilizers have been used as capping agents to stabilize the nanoparticles, including surfactants [22], polymers [23], dendrimers [24], as well as different types of ligands [25]. Thiol-and amine-based sol-gel is one of the most commonly employed functionalized materials, which provides great stability to the attached nanoparticles in both aqueous and organic media [26]. Amine functional groups can exhibit dual functionality in the sol-gel monomers and act as a capping agent to the metal sol and complex the metal ions.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous detection of dopamine and ascorbic acid using silicate network interlinked gold nanoparticles and multi-walled carbon nanotubes

Vinoth

Asiri

et al. 2015

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Simultaneous detection of dopamine and ascorbic acid using silicate network interlinked gold nanoparticles and multi-walled carbon nanotubes

Vinoth

Asiri

et al. 2015

Sensors and Actuators B: Chemical

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“…This process can also be carried out at low temperatures, and chemically inert, porous and mechanically stable transparent homogeneous materials are obtained [79,90]. The sol-gel process involves the hydrolysis of constituent molecular precursors and subsequent polycondensation [39].…”

Section: Sol-gel Methodsmentioning

confidence: 99%

Enzyme Immobilization by Amperometric Biosensors with TiO2 Nanoparticles Used to Detect Phenol Compounds

et al. 2015

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Nanoparticles of titanium dioxide (TiO 2 ) have unique properties in creating an appropriate microenvironment for immobilizing biomolecules without loss of biological activity, and facilitating electron transference between the enzyme and surface of the electrode. TiO 2 properties have led to its intensive use in building electrochemical biosensors. Another aspect is, the chemical process of sol-gel which offers new and interesting advantages in the encapsulation of biomolecules sensitive to heat and environmental conditions (enzymes, proteins, antibodies, and cells from plants, animals and micro-organisms), mainly due to a synthesized process at low temperatures. The nanomaterials produced by sol-gel have many advantages, including chemical inertia, physical rigidity, insignificant swelling in an aqueous medium, and porosity. For this reason, electrochemical biosensors consisting of nanomaterials have been extensively investigated and used in important industrial sectors, such as, those of pharmaceuticals, health, food, agriculture, and environment. They provide real-time data, which allows the control and traceability of each of the processes involved. Biosensors are devices that consist of one element of molecular recognition (biomolecules) and one transduction element. The objective of this work is to conduct a review of electrochemical biosensors using nanoparticles obtained from the sol-gel process and their potential application to measure phenol compounds.

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“…Our samples were initially fabricated using the standard sol-gel recipe, [7][8][9] which involves the hydrolysis and polycondensation of Si ðOC 2 H 5 Þ 4 (TEOS), carried out by dissolving TEOS in ethanol (C 2 H 5 OH) before mixing in deionized water (H 2 O) and hydrochloric acid (HCl). Here ethanol serves as a mutual solvent, and hydrochloric acid is the catalyst for producing the SiO 2 sol.…”

Section: Sample Fabricationmentioning

confidence: 99%

“…5,6 The sol-gel method is an effective technique to develop such QD thinfilm sensors. [7][8][9] In this paper, we report a systematic study of sol-gel fabrication of QD-embedded glass thin films, focusing primarily on using commercial cadmium selenide (CdSe) QDs. CdSe QDs have suitable energy levels for our intended ultrafast nanophotonics research, and commercial QDs offer excellent size uniformity.…”

Section: Introductionmentioning

confidence: 99%

Acid-free sol-gel fabrication of glass thin films embedded with II-VI colloidal quantum dots

Jani

Duan

2015

J. Nanophoton

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Abstract. II-VI colloidal quantum dots (QDs) are ideal for optical sensors thanks to their high fluorescent brightness and good size uniformity. However, embedding colloidal QDs into a glass matrix with the standard sol-gel process leads to the QDs being damaged by the acid catalyst. Here, we report an acid-free sol-gel technique, which proves to be both simple and effective in fabricating silica glass thin films embedded with commercial II-VI colloidal QDs. Octadecylamine ligands are used as a bifunctional aid to not only stabilize the QDs in solution, but also assist the formation of the SiO 2 gel. We demonstrate that high-quality QD-embedded glass thin films can be developed with this technique, and our fluorescent tests indicate that, except for a small blueshift in the emission spectrum, the QDs are very well preserved through the sol-gel process. This method offers a fast and low-cost path towards thin-film QD sensors with good mechanical and thermal stabilities, which are desirable for applications involving highly focused laser beams, such as ultrafast nanophotonics. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Chemical Routes in the Synthesis of Nanomaterials Using the Sol—Gel Process

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Cited by 22 publications

References 1 publication

Simultaneous detection of dopamine and ascorbic acid using silicate network interlinked gold nanoparticles and multi-walled carbon nanotubes

Simultaneous detection of dopamine and ascorbic acid using silicate network interlinked gold nanoparticles and multi-walled carbon nanotubes

Enzyme Immobilization by Amperometric Biosensors with TiO2 Nanoparticles Used to Detect Phenol Compounds

Acid-free sol-gel fabrication of glass thin films embedded with II-VI colloidal quantum dots

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