Seeded Growth Synthesis of Gold Nanotriangles: Size Control, SAXS Analysis, and SERS Performance

ACS Applied Materials & Interfaces
Christian KuttnerRafael Contreras-Cáceres

Abstract

We studied the controlled growth of triangular prismatic Au nanoparticles with different beveled sides for surface-enhanced Raman spectroscopy (SERS) applications. First, in a seedless synthesis using 3-butenoic acid (3BA) and benzyldimethylammonium chloride (BDAC), gold nanotriangles (AuNTs) were synthesized in a mixture with gold nanooctahedra (AuNOCs) and separated by depletion-induced flocculation. Here, the influence of temperature, pH, and reducing agent on the reaction kinetics was initially investigated by UV-vis and correlated to the size and yield of AuNT seeds. In a second step, the AuNT size was increased by seed-mediated overgrowth with Au. We show for the first time that preformed 3BA-synthesized AuNT seeds can be overgrown up to a final edge length of 175 nm and a thickness of 80 nm while maintaining their triangular shape and tip sharpness. The NT morphology, including edge length, thickness, and tip rounding, was precisely characterized in dispersion by small-angle X-ray scattering and in dry state by transmission electron microscopy and field-emission scanning electron microscopy. For sensor purposes, we studied the size-dependent SERS performance of AuNTs yielding analytical enhancement factors between 0.9 × ...Continue Reading

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Citations

Jul 12, 2019·Chemical Society Reviews·Joanna Olesiak-BanskaMarek Samoc
Sep 20, 2019·Nanoscale·Christian KuttnerLuis M Liz-Marzán
Jan 1, 2020·Scientific Reports·Hyeong Jin KimDavid Vaknin
Jun 18, 2019·ChemistryOpen·Piotr SzustakiewiczWiktor Lewandowski
Jul 30, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xingyi Ma, Sang Jun Sim
Nov 25, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Matti KnaapilaGunnel Karlsson
Dec 9, 2020·Analytical Methods : Advancing Methods and Applications·Yuan LiuYuling Wang
Mar 6, 2021·Chemical Society Reviews·Mauro Sousa de AlmeidaBarbara Rothen-Rutishauser
Mar 9, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Jackeline Soto-CruzOscar Rojas-Carrillo
Apr 4, 2021·Sensors·Paulo S S Dos SantosLuís C C Coelho
May 1, 2021·Nanomaterials·Ekaterina PodlesnaiaWolfgang Fritzsche
Jul 20, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Mohammad Kamal Hossain, Qasem Ahmed Drmosh
Dec 12, 2020·ACS Applied Materials & Interfaces·Roland P M HöllerChristian Kuttner
Jul 11, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Katherinne I RequejoEugene R Zubarev
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Mar 19, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Ye YuAndreas Fery
Mar 17, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Xianghua MengChaoyang Jiang
Aug 27, 2021·Mikrochimica Acta·Xiaowen OuShenshan Zhan
Aug 14, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Kathrin EitelHans Joachim Schöpe

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