New approaches to control the self-assembly of gold nanoparticles and their surface-enhanced Raman scattering properties

Udayabhaskararao Thumu^a, Lothar Houben^c^,^d^,^e, Ayelet Teitelboim^a, Rafal Klajn^a, Thomas Altantzis^b, Marc Coronado-Puchau^f, Judit Langer^f, Ronit Popovitz-Biro^c, Luis M. Liz-Marzán^f^,^g, Lela Vuković^h, Petr Králⁱ^,^j, Sara Bals^b, Rafal Klajn^a

^aDepartment of Physics of Complex Systems, Weizmann Institute of Science, Herzl Street, 234, Rehovot, Israel

^bDepartment of Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel

^cDepartment of Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel

^dErnst Ruska-Centre for Microscopy and Spectroscopy with Electrons, 52425 Jülich, Germany

^ePeter Grünberg Institut, Forschungszentrum Jülich, DE, Jülich, Germany

^fCIC biomaGUNE, Donosti, ES, Paseo de Miramón, 182, San Sebastián, Spain

^gIKERBASQUE, Basque Foundation for Science, ES, Bilbao, Spain

^hDepartment of Chemistry, University of Texas at El Paso, USA, El Paso, Texas 79968, EE. UU., El Paso, United States

ⁱDepartment of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA

^jDepartment of Biopharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA

Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe September Meeting 2017 (NFM17)

SE2: Opto-electronics of 2-D Nanostructured Semiconductors: Parabolic vs. Linear Dirac Bands

Barcelona, Spain, 2017 September 4th - 9th

Organizers: Daniel Vanmaekelbergh and Cherie Kagan

Oral, Udayabhaskararao Thumu, presentation 149
Publication date: 20th June 2016

New approaches to control the self-assembly of gold nanoparticles and their surface-enhanced Raman scattering

Thumu Udayabhaskararao,¹ Thomas Altantzis,² Lothar Houben,^3,4,5 Marc Coronado-Puchau,⁶ Judith Langer,⁶ Ronit Popovitz-Biro,³ Luis M. Liz-Marzán,^6,7 Lela Vuković,⁸ Petr Král,^9,10,11 Sara Bals,² Rafal Klajn¹*

Ordered arrays or superlattices consisting of nanocrystals (NCs) of different diameter represent an important class of materials. There have been advanced methods to assemble nanoparticles of two different materials into binary nanoparticle superlattices (BNSLs).¹ Recently, Rafal et al. has reported highly organized monocomponent helical structures formed from magnetic cubes.² But this process is limited only to magnetic inorganic materials. On the other hand, there were no unique approaches to make highly organized non-close packed self-assembled structures in the size regime below 20 nm. For example, self-assembly of alkanethiol-protected gold nanoparticles can only give rise to close-packed structures such as hexagonal or FCC arrangements. It is challenging to produce superlattices of inorganic nanoparticles into loosely packed arrangements. Despite these advances in template-assisted arrangement of inorganic nanoparticles,³ little progress has been made over controlling the desired structure of the superlattices. Here, we developed a new approach based on post-modification of BNSLs to create unprecedented monocomponent nanoparticle crystals. We demonstrate the formation various non-close packed monocomponent structures. We have examined several different NP arrays as substrates for surface-enhanced Raman scattering (SERS) and found the best arrays for superior signal enhancement properties.

References:

A. Dong, J. Chen, P. M. Vora, J. M. Kikkawa C. B. Murray Nature 2010, 466, 474.

G. Singh, H. Chan, A. Baskin, E. Gelman, N. Repnin, P. Král, R. Klajn Science 2014, 345, 1149.

S. Y. Park, A. K. R. Lytton-Jean, B. Lee, S. Weigand, G. C. Schatz, C. A. Mirkin, Nature 2008, 451, 553.

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