Coupled Plasmon Resonances and Gap Modes in Laterally Assembled Gold Nanorod Arrays

Jatish Kumar 1 , Xingzhan Wei 2 , Steven J. Barrow 2 , Alison M. Funston 3 , K. George Thomas 1 , 4 ,  and Paul Mulvaney 2
  • 1 CSIR – National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, Kerala, India
  • 2 ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia
  • 3 ARC Centre of Excellence in Exciton Science, School of Chemistry, Monash University, Clayton, VIC 3800, Australia
  • 4 School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram (IISER-TVM), CET Campus, Thiruvananthapuram 695 016, Kerala, India
Jatish Kumar
  • CSIR – National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, Kerala, India
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, Xingzhan Wei
  • ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia
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, Steven J. Barrow
  • ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia
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, Alison M. Funston
  • ARC Centre of Excellence in Exciton Science, School of Chemistry, Monash University, Clayton, VIC 3800, Australia
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, K. George Thomas
  • CSIR – National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, Kerala, India
  • School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram (IISER-TVM), CET Campus, Thiruvananthapuram 695 016, Kerala, India
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and Paul Mulvaney
  • Corresponding author
  • ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia
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Abstract

The assembly of metal nanocrystals offers a flexible method for creating new materials with tunable, size-dependent optical properties. Here we study the lateral assembly of gold nanorods into arrays, which leads to strong colour changes due to surface plasmon coupling. We also demonstrate the first example of gap modes in colloid systems, an optical mode in which light waves propagate in the channels between the gold rods. Such modes resonate at wavelengths which strongly depend on the gap width and length.

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Founded in 1887, the Zeitschrift für Physikalische Chemie covers the main developments in physical chemistry, placing with an emphasis on experimental research. It represents a combination ofdiscusses reaction kinetics and spectroscopy, surface research and electrochemistry, thermodynamics and the structure analysis of matter in its various conditions, among other topics.

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