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Achieving High-purity Colloidal Gold Nanoprisms and Their Application as Biosensing Platforms by Zhirui Guo; Xu Fan; Lianke Liu; Zhiping Bian; Chunrong Gu; Yu Zhang; Ning Gu; Di Yang; Jinan Zhang is a Chemistry article available to read on EtoBox.

What is Achieving High-purity Colloidal Gold Nanoprisms and Their Application as Biosensing Platforms about?

Gold nanoprisms with average edge size of $140 nm and thickness of $8 nm were achieved in highpurity ($97%) by exploiting the electrostatic aggregation and shape effects through a modified seedmediated approach. The proposed strategy lies in the dramatically different stability and aggregation potential between the produced gold nanoprisms and spherical gold nanoparticles, which can be modulated by varying the anion concentration in the reaction solution. Hence, the gold nanoprisms spontaneously aggregated into precipitate whereas most of the spherical ones were still kept in the solution. Moreover, this strategy is also flexible enough that ultra-small gold nanoprisms with average width less than 50 nm can be collected in good-purity. The structure and optical properties of these nanoprisms have been studied by TEM, SAED, XRD and UV-vis-NIR spectroscopy, respectively. These high-purity colloidal gold nanoprisms exhibit remarkably enhanced surface plasmon resonance (SPR) as well as strong near-infrared absorption. Furthermore, we have also investigated their potential for biosensing based on the sensitive changes of SPR band induced by the antibody-antigen recognition events. The e

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Author

Zhirui Guo; Xu Fan; Lianke Liu; Zhiping Bian; Chunrong Gu; Yu Zhang; Ning Gu; Di Yang; Jinan Zhang

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

2010

Language

EN

Field

Chemistry (Physical Sciences)