Conjugates of Zinc Tetramethylpyridylporphyrinate with Colloidal Gold Nanoparticles Stabilized with Citrate

Colloidal gold nanoparticles have been successfully prepared using a simple two-electrode cells connected to a DC power supply. During the electro-dissolution-reduction process, the bulk gold at the anode oxidized into gold cations which then reacted with the chloride ions to form aurochloride complex. The complex ions were then reduced by the citrate ion to form colloidal gold nanoparticles. The size and shape of the nanoparticles were modulated by varying the terminal voltages. The colloidal gold nanoparticles obtained were characterized by field-emission scanning electron microscope (FESEM), transmission electron microscope (TEM) and ultraviolet-visible spectrophotometer (UV-Vis). From FESEM analysis, it was found that by increasing the voltage, the size of colloidal gold nanoparticles produced marginally decreased. The mean sizes of gold nanoparticles were roughly about 23.5 nm, 23.2 nm and 19.3 nm for 32 V, 36 V and 40 V, respectively. TEM micrograph showed that the shape of gold nanoparticles obtained is almost spherical. The characteristic peaks of UV-Vis spectra revealed that the suspension was indeed colloidal gold nanoparticles. Keywords: Gold, Nanoparticles, Electro-dissolution-reduction

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Electrochemical detection of hepatitis B surface antigen using colloidal gold nanoparticles modified by a sol–gel network interface

Clinical Biochemistry ◽

10.1016/j.clinbiochem.2005.12.003 ◽

2006 ◽

Vol 39 (3) ◽

pp. 309-314 ◽

Cited By ~ 42

Author(s):

Dianping Tang ◽

Ruo Yuan ◽

Yaqin Chai ◽

Xia Zhong ◽

Yan Liu ◽

...

Keyword(s):

Gold Nanoparticles ◽

Hepatitis B ◽

Electrochemical Detection ◽

Surface Antigen ◽

Colloidal Gold ◽

Hepatitis B Surface Antigen ◽

Sol Gel ◽

Network Interface ◽

Colloidal Gold Nanoparticles ◽

Gel Network

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Back Cover: Unconventional Chain-Growth Mode in the Assembly of Colloidal Gold Nanoparticles (Angew. Chem. Int. Ed. 32/2012)

Angewandte Chemie International Edition ◽

10.1002/anie.201205216 ◽

2012 ◽

Vol 51 (32) ◽

pp. 8122-8122 ◽

Cited By ~ 1

Author(s):

Hong Wang ◽

Liyong Chen ◽

Xiaoshuang Shen ◽

Liangfang Zhu ◽

Jiating He ◽

...

Keyword(s):

Gold Nanoparticles ◽

Colloidal Gold ◽

Growth Mode ◽

Chain Growth ◽

Back Cover ◽

Colloidal Gold Nanoparticles

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Characterisation and determination of stability and functionality of biofunctionalised colloidal gold nanoparticles

Analytica Chimica Acta ◽

10.1016/j.aca.2005.09.032 ◽

2006 ◽

Vol 556 (2) ◽

pp. 306-312 ◽

Cited By ~ 8

Author(s):

Mònica Campàs ◽

Ioanis Katakis

Keyword(s):

Gold Nanoparticles ◽

Colloidal Gold ◽

Colloidal Gold Nanoparticles

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Detection and difference analysis of the enzyme activity of colloidal gold nanoparticles with negatively charged surfaces prepared by different reducing agents

10.21203/rs.3.rs-496828/v1 ◽

2021 ◽

Author(s):

Junjun Cao ◽

Jie Zhang ◽

Ning Yuan ◽

Yixiao Sun ◽

Zhihua Xu ◽

...

Keyword(s):

Gold Nanoparticles ◽

Enzyme Activity ◽

Hydroxyl Radical ◽

Colloidal Gold ◽

Negative Charge ◽

Linear Chain ◽

Reducing Agents ◽

Difference Analysis ◽

Charged Surfaces ◽

Colloidal Gold Nanoparticles

Abstract Research on the activity of nanoenzymes has always been a focus of nanomaterials. In this study, several reducing agents with different structures were used to prepare colloidal gold with a negative charge and similar size by controlling the temperature and pH. The affinity analysis of the substrate H 2 O 2 and TMB showed that the activity of colloidal gold nanoenzymes prepared by different reducing agents was in the order of Cc, Hq, Rs, Vc, Ga, Sc, Sm, St. The rule is that the enzyme activity of colloidal gold reduced by benzene ring is higher than that of colloidal gold enzyme reduced by linear chain. Finally, we discussed the activity of colloidal gold peroxidase from the number and position of isomers and functional groups, and demonstrated that the nanoenzyme activity affected the surface activity of colloidal gold, the elimination of hydroxyl radical and TMB binding efficiency.

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