Synthesis and bioconjugation of alkanethiol-stabilized gold bipyramid nanoparticles.

Synthesis and bioconjugation of alkanethiol-stabilized gold bipyramid nanoparticles.
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DOI:
10.1088/1361-6528/abe823
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发表时间:
2021-03-09
期刊:
影响因子:
3.5
通讯作者:
Mayer KM
Mayer KM
中科院分区:
材料科学3区
文献类型:
--
作者:
Abdul-Moqueet MM;Tovias L;Lopez P;Mayer KM

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Gold bipyramid (GBP) nanoparticles are promising for a range of biomedical applications, including biosensing and surface-enhanced Raman spectroscopy, due to their favorable optical properties and ease of chemical functionalization. Here we report improved synthesis methods, including preparation of gold seed particles with an increased shelf life of ~1 month, and preparation of GBPs with significantly shortened synthesis time (< 1 h). We also report methods for the functionalization and bioconjugation of the GBPs, including functionalization with alkanethiol self-assembled monolayers (SAMs) and bioconjugation with proteins via carbodiimide cross-linking. Binding of specific antibodies to the nanoparticle-bound proteins was subsequently observed via localized surface plasmon resonance sensing. Rabbit IgG and goat anti-Rabbit IgG antibodies were used as a model system for antibody-antigen interactions. As-synthesized, SAM-functionalized, and bioconjugated bipyramids were characterized using scanning electron microscopy, UV–vis spectroscopy, zeta potential, and dynamic light scattering.
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影响因子: --
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