A novel method of preparing thiol-derivatised nanoparticles of gold, platinum and silver forming superstructures

Sarathy, K. Vijaya; Kulkarni, G. U.; Rao, C. N. R.

doi:10.1039/a700738h

Cited by 169 publications

(33 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Electrochemical [162] as well as sonoelectrochemical [163] methods of syntheses also have been reported. A number of similar nanocrystal systems have been reported in the literature [164][165][166]. It is found that the Au/thiol system is thermodynamically stable while others are kinetically stable [164].…”

Section: Synthesismentioning

confidence: 84%

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Sandhyarani

Pradeep

2003

International Reviews in Physical Chemistry

View full text Add to dashboard Cite

Section: Synthesismentioning

confidence: 84%

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Sandhyarani

Pradeep

2003

International Reviews in Physical Chemistry

View full text Add to dashboard Cite

“…Nowadays, at least two basic ways of surface functionalization in relation to nanoparticles are possible: functionalization of the nanoparticle surface and modification of solid surfaces and matrices by nanoparticles. As first, surface modification of nanoparticles by incorporation of various ligands (Sakura et al 2005;Stenkamp et al 2001;Zhao et al 2005;Liu et al 2008), functional groups (Hiramatsu and Osterloh 2004;Sarathy et al 1997) and many others species (Wang et al 2002;Thompson et al 2008) onto nanoparticle surfaces is considered. This approach determines the interaction between modified nanoparticles, environment and biosystems as well as allows to control the growth of the particles and prevents their aggregation and precipitation.…”

Section: Introductionmentioning

confidence: 99%

Silica nanocomposites based on silver nanoparticles-functionalization and pH effect

2018

View full text Add to dashboard Cite

Current reports in the field of nanotechnology indicate that the properties of metal nanoparticles are determined by their features such as size, shape, composition as well as a degree of crystallinity and stability. These, in turn, may depend heavily on their preparation way, treatment during and after synthesis and finally on properties of the supports and matrices. The goal of presented work was to determine the shape, size, and distribution of silver nanoparticles depending on preparation conditions. In particular, the issues of the formation of silver nanostructures (AgNP) with various shapes and sizes depending on functionalized silica surface as well as on the conditions of the impregnation step by noble metal ions (especially pH) were considered. In particular, the comprehensive approach to determine the impact of pH conditions on the properties of metallic nanoparticles is laid down in this work. Three types of fumed silica materials were selected as the supports of silver nanostructures (Aerosil 150, Aerosil 300 and Silochrom C-120). Silica materials were chemically functionalized by thiol and amine groups and treated with diamminesilver(I) ions [Ag(NH 3 ) 2 ] + . As a result of their reduction silicas adorned with silver nanostructures were obtained. In this work, the AgNP in the form of very small nanoparticles, longitudinal and spherical forms and greater structures with nondescript shape were successfully received and characterized through changing the form of functional groups on the solid surface by adjusting the pH conditions. It turns out that protonation and deprotonation of thiol, amino, and hydroxyl groups can be responsible for possible interactions between noble metal ions and functional groups in the form of both attractive and repulsive electrostatic interactions. The Ag nanoparticle/silica nanocomposites were investigated by X-ray diffraction, atomic force microscopy, potentiometric titration and X-ray photoelectron spectroscopy.

show abstract

“…Preparation of tert‐ docecanethiol‐coated gold and silver nanoparticles : Gold nanoparticles were prepared according to a literature procedure 40. Silver nanoparticles were prepared by a modified literature method 41. AgNO 3 (150 mg) was dissolved in water (7 mL), then tetraoctylammonium bromide (300 mg) in toluene (7 mL) was added with stirring.…”

Section: Methodsmentioning

confidence: 99%

Supramolecular Hybrid of Metal Nanoparticles and Semiconducting Single‐Walled Carbon Nanotubes Wrapped by a Fluorene–Carbazole Copolymer

Ozawa

Ide

Fujigaya

et al. 2011

Chemistry A European J

View full text Add to dashboard Cite

The first approach for the preparation of metal nanoparticle/semiconducting single-walled carbon nanotube (SWNT) hybrids with specified chirality is described. For this purpose, a copolymer of a fluorene derivative with two long-chain alkyl substituents and a carbazole derivative carrying a thiol group was used. The copolymer was found to selectively dissolve (7,6)- and (8,7)SWNTs, as determined by UV/Vis/NIR absorption and Raman spectroscopy and 2D photoluminescence mapping. Gold and silver nanoparticles with diameters of about 3.8 and about 3.2 nm, respectively, were readily attached along the SWNTs by means of coordination bonds between the nanoparticles and the thiol moieties on the copolymer, as revealed by atomic force and electron microscopy studies. The study provides a novel way to design and fabricate metal nanoparticle/semiconducting SWNT hybrids with specific nanotube chirality.

show abstract

A novel method of preparing thiol-derivatised nanoparticles of gold, platinum and silver forming superstructures

Abstract: Fig. 3 TEM images of thiol-derivatised Pt (a) and Ag (b) nanoparticles 538

Cited by 169 publications

References 9 publications

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Silica nanocomposites based on silver nanoparticles-functionalization and pH effect

Supramolecular Hybrid of Metal Nanoparticles and Semiconducting Single‐Walled Carbon Nanotubes Wrapped by a Fluorene–Carbazole Copolymer

Contact Info

Product

Resources

About