Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 36, Pages 23909-23919Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b07218
Keywords
multibranched nanoparticles; gold nanoechinus; gemini cationic surfactant; NIR; SERS; dopamine
Funding
- Ministry of Science & Technology, Taiwan
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High-yield multibranched Au nanoechius possessing lengthy and dense branched nanorods on the surface were synthesized: using a seed mediated surfactant-directed approach in the :presence of gemini cationic surfactant N,N,N'N'-tetrarnethyl-N'-ditetradecylethane-1,2-diaminium bromide (C14C2C14Br3), HAuCl4, AgNO3; and ascorbic acid. C14C2C14Br2 surfactant provides a versatile template in designing the, unique morphology of Au nanoechinus with the assistance of AgNO3. UV-vis spectroscopic analysis proves that Au nanoechinus, possess a unique intense broad localized surface plasmon resonance (LSPR) peak, which extends from 400 to 1700 run in the NIR region making a highly potential platform for biomedical applications: Systematic time-dependent TEM, UV-vis NIR, and XRD analysis were performed to monitor the morphological evolution of multibranched Au nanoechinus. It was found that the surface of branched nanorods of Au NE preferentially grew along (111) crystal planes. Furthermore, as-synthesized Au-nanoechinus shows excellent SERS enhancement ability for dopamine inside HeLa cells.
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