Sol-gel derived precursors to Group 14 semiconductor nanocrystals – Convenient materials for enabling nanocrystal-based applications

Veinot, Jonathan G. C.; Henderson, Eric J.; Hessel, Colin M.

doi:10.1088/1757-899x/6/1/012017

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Using the sol-gel method, various NMs become available in mass-production, including group 14 semiconductor nanocrystals [54], TiO 2 NPs from a different precursor [55] with various morphologies [56], and different dopants [57,58] 5 Sol-gel methods [60], LiFePO 4 NPs [61] as a cathode material, XCuZn ferrite NPs (where X = Ni [62] or Mg [63]), Fe 2 O 3 /Al nanocomposites [64].…”

Section: Sol-gel Methodsmentioning

confidence: 99%

Liquid-phase synthesis of nanoparticles and nanostructured materials

Karatutlu

Barhoum

Sapelkin

2018

Emerging Applications of Nanoparticles and Architecture Nanostructures

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CHAPTER 1 Liquid-phase synthesis of nanoparticles and nanostructured materials on changing their physical properties; (7) size and shape of NPs and nanostructures could be controlled quite well by the most liquid-phase synthesis methods (depending on the method used). Chemical purification and size separation techniques, such as chromatography and high-performance liquid chromatography (HPLC) are not required; (8) postsynthesis techniques are available for formation of clusters [6] and 2d superlattices [7] from the as-prepared NPs and nanostructures. The liquid-phase synthesis can be classified into: (1) top-down approaches, where bulk materials are etched in an aqueous solution for producing NPs or nanostructures, for example, the synthesis of porous silicon by electrochemical etching; and (2) bottom-up approaches, where atoms/molecules via self-assembly, in general, are gathered together to form NMs and mixed in a controlled fashion to form a colloidal solution (Fig. 1.2). NPs produced by liquid-phase synthesis methods can remain in liquid suspension for further use or may be collected by filtering or by spray drying to produce a dry powder. Liquid-phase synthesis methods from a solution of chemical compounds include, but are not limited to, chemical stain etching, colloidal methods, coprecipitation, electrochemical deposition, direct precipitation, sol-gel processing, microemulsions method, reverse micelle synthesis, hydrothermal synthesis, template methods, polyol method, and laser ablation. In this ■ ■ FIGURE 1.2 Schematic of the formation of NMs processes. Top-down versus bottom-up liquid-phase synthesis methods. ■ ■ FIGURE 1.1 Various methods for formation of NMs. The liquid-phase synthesis is reported as one of the most widespread synthesis technique together with the gas-state synthesis.

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Section: Sol-gel Methodsmentioning

confidence: 99%

Liquid-phase synthesis of nanoparticles and nanostructured materials

Karatutlu

Barhoum

Sapelkin

2018

Emerging Applications of Nanoparticles and Architecture Nanostructures

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“…SiC QDs may be fabricated by embedding SiC particles in Si or SiO 2 matrix 16 or by use of sol-gel precursors. 17 Nevertheless, electrochemical etching of bulk SiC is the most widely used method where porous layers form during etching and these layers are broken down in an ultrasonic bath or by milling, and finally SiC QDs are produced with sizes smaller than 10 nm. 18 Cubic SiC may be effectively treated by electroless wet chemical etching in a mixture of hydrofluoric acid (HF) and nitric acid (HNO 3 ) at elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Small Silicon Carbide Quantum Dots by Wet Chemical Etching

et al. 2012

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Fabrication of nanosized silicon carbide (SiC) crystals is a crucial step in many biomedical applications. Here we report an effective fabrication method of SiC nanocrystals based on simple electroless wet chemical etching of crystalline cubic SiC. Comparing an open reaction system with a closed reaction chamber, we found that the latter produces smaller nanoparticles (less than 8 nm diameter) with higher yield. Our samples show strong violet-blue emission in the 410-450 nm region depending on the solvents used and the size. Infrared measurements unraveled that the surface of the fabricated nanoparticles is rich in oxidized carbon. This may open an opportunity to use standard chemistry methods for further biological functionalization of such nanoparticles.

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