Surface Modification of Citrate-Capped Gold Nanoparticles Using CTAB Micelles

Lim, Jonghui; Lee, Na-Eun; Lee, Eunji; Yoon, Sangwoon

doi:10.5012/bkcs.2014.35.8.2567

Cited by 25 publications

(24 citation statements)

References 24 publications

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“…In case of AuNSs obviously dimethoate interacted directly with gold; that is, dimethoate replaced the citrate ions on the surface of the AuNSs [22]. On the other side, it seems that dimethoate interacted with AuNRs via CTAB [36,38,39]. These results are in accordance with results obtained spectrophotometrically.…”

Section: Ftir Analysissupporting

confidence: 88%

Adsorption of Organophosphate Pesticide Dimethoate on Gold Nanospheres and Nanorods

Momić

Pašti

Bogdanović

et al. 2016

Journal of Nanomaterials

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Organophosphorus pesticide dimethoate was adsorbed onto gold nanospheres and nanorods in aqueous solution using batch technique. Adsorption of dimethoate onto gold nanoparticles was confirmed by UV-Vis spectrophotometry, TEM, AFM, and FTIR analysis. The adsorption of nanospheres resulted in aggregation which was not the case with nanorods. Nanoparticles adsorption features were characterized using Langmuir and Freundlich isotherm models. The Langmuir adsorption isotherm was found to have the best fit to the experimental data for both types of nanoparticles. Adsorption capacity detected for nanospheres is 456 mg/g and for nanorods is 57.1 mg/g. Also, nanoparticles were successfully used for dimethoate removal from spiked drinking water while nanospheres were shown to be more efficient than nanorods.

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Section: Ftir Analysissupporting

confidence: 88%

Adsorption of Organophosphate Pesticide Dimethoate on Gold Nanospheres and Nanorods

Momić

Pašti

Bogdanović

et al. 2016

Journal of Nanomaterials

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“…In order to obtain the stabilization of citrate-capped AuNPs by the addition of amphiphilic materials (for example cetyltrimethylammonium bromide (CTAB)), two methods can be devised: ( i ) a bilayer formation of CTAB on the AuNP surfaces; ( ii ) adsorption of CTAB micelles on the AuNPs. Moreover, CTAB micelles can entrap hydrophobic molecules in their aqueous core and deliver them to the AuNP surfaces, thus allowing and favoring the study of surface-enhanced fluorescence, surface-enhanced Raman scattering and photochemical reactions of hydrophobic molecules [ 65 ].…”

Section: Organometallic and Hydrophobic Ligands Capping Agents Fomentioning

confidence: 99%

Hydrophobic and Hydrophilic Au and Ag Nanoparticles. Breakthroughs and Perspectives

Fratoddi

2017

Nanomaterials

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This review provides a broad look on the recent investigations on the synthesis, characterization and physico-chemical properties of noble metal nanoparticles, mainly gold and silver nanoparticles, stabilized with ligands of different chemical nature. A comprehensive review of the available literature in this field may be far too large and only some selected representative examples will be reported here, together with some recent achievements from our group, that will be discussed in more detail. Many efforts in finding synthetic routes have been performed so far to achieve metal nanoparticles with well-defined size, morphology and stability in different environments, to match the large variety of applications that can be foreseen for these materials. In particular, the synthesis and stabilization of gold and silver nanoparticles together with their properties in different emerging fields of nanomedicine, optics and sensors are reviewed and briefly commented.

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“…In the case of 10 mmol L -1 of anionic SDS, the AuNPs did not aggregate due to the electrostatic repulsion between the negative head group (-OSO 3 -) and citrate capping on AuNPs. AuNPs were stabilized at > 10 mmol L -1 of SDS micelles since the SDS micelles adsorbed on the surface of citrate-capped AuNPs (13).…”

Section: Diameter Of Aunpsmentioning

confidence: 99%

Spectrofluorimetric method for atenolol determination based on gold nanoparticles

et al. 2018

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A simple and sensitive spectrofluorimetric method for determination of atenolol (ATE) using gold nanoparticles (AuNPs) was developed. The method is based on the quenching effect of atenolol on photoluminescence of AuNPs at λem = 705 nm. Variables affecting luminescence of gold nanoparticles such as the solvent, pH value and surfactant were studied and optimized. The method was preliminarily validated according to ICH guidelines. A linear correlation was recorded within the range of 1.0-10 mg mL-1 ATE with the coefficient of determination R2 of 0.999. The limit of detection and limit of quantitation for atenolol were found to be 0.87 and 2.64 mg mL-1, resp. Good recoveries in the range of 98.7-100.0 % were obtained for spiked samples. The proposed method was applied successfully to assaying atenolol in pharmaceuticals formulations.

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Surface Modification of Citrate-Capped Gold Nanoparticles Using CTAB Micelles

Cited by 25 publications

References 24 publications

Adsorption of Organophosphate Pesticide Dimethoate on Gold Nanospheres and Nanorods

Adsorption of Organophosphate Pesticide Dimethoate on Gold Nanospheres and Nanorods

Hydrophobic and Hydrophilic Au and Ag Nanoparticles. Breakthroughs and Perspectives

Spectrofluorimetric method for atenolol determination based on gold nanoparticles

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