Profile Controlled Gold Nanostructures Fabricated by Nanosphere Lithography for Localized Surface Plasmon Resonance

Localized surface plasmon resonance (LSPR) is the coherent oscillation of conductive electrons confined in noble metallic nanoparticles excited by electromagnetic radiation, and nanosphere lithography (NSL) is one of the cost-effective methods to fabricate metal nanostructures for LSPR. NSL can be categorized into two major groups: dispersed NSL and closely pack NSL. In recent years, gold nanocrescents and gold nanoholes with vertical sidewalls fabricated by dispersed NSL, and silver nanotriangles and gold nanocaps on silica nanospheres fabricated by closely pack NSL, have been reported for LSPR biosensing. This paper introduces several novel gold nanostructures fabricated by NSL in LSPR applications, including 3D nanostructures obtained by evaporating gold obliquely on dispersed nanospheres, nanoholes with slant sidewalls, and patchy nanoparticles on closely packed nanospheres, all of which render satisfactory sensitivity for LSPR sensing. Since the LSPR spectrum is very sensitive to the shape of the metal nanostructures, formulas are derived and software is developed for calculating the profiles of the obtainable metal nanostructures by NSL, for different nanosphere masks with different fabrication conditions. The simulated profiles coincide well with the profiles of the fabricated gold nanostructures observed under scanning electron microscope (SEM) and atomic force microscope (AFM), which proves that the software is a useful tool for the process design of different LSPR nanostructures.

Authors:

• Xiaodong Zhou
• Nan Zhang

Keywords:

• Nanosphere lithography
• localized surface plasmonresonance
• biosensor
• simulation.

References:

[1] C. F. Bohren and D. R. Huffman, "Absorption and Scattering by Small
Particles", New York: Wiley Interscience, 1983.
[2] E. Hutter and J. H. Fendler, "Exploitation of localized surface plasmon
resonance," Adv. Mater., vol. 16, 1685-1706, 2004
[3] B. Sepulveda, P. C. Angelome, L. M. Lechuga, and L. M. Liz-Marzan,
"LSPR-based Nanobiosensor," Nano Today, vol. 4, pp. 244-251, 2009.
[4] A. J. Haes and R. P. Van Duyne, "A nanoscale optical biosensor:
Sensitivity and selectivity of an approach based on the localized surface
plasmon resonance spectroscopy of triangular silver nanoparticles," J.
Am. Chem. Soc., vol. 124, pp. 10596-10604, 2002.
[5] J. C. Riboh, A. J. Haes, A. D. McFarland, C. R. Yonzon, and R. P. Van
Duyne, "A nanoscale optical biosensor: real-time immunoassay in
physiological buffer enabled by improved nanoparticles adhesion," J.
Phys. Chem. B, vol. 107, pp. 1772-1780, 2003.
[6] J. N. Anker, W. P. Hall, O. Lyandres, N. C. Shah, J. Zhao and R. P. Van
Duyne, "Biosensing with plasmonic nanosensors," Nat. Mater., vol. 7,
pp. 442-453, June 2008.
[7] M. E. Stewart, C. R. Anderton, L. B. Thompson, J. Maria, S. K. Gray, J.
A. Rogers, and R. G. Nuzzo, "Nanostructured plasmonic sensors," Chem
Rev., vol. 108, pp. 494-521, February 2008.
[8] M. Fleischmann, P. J. Hendra, and A. J. Mcquillan, "Raman spectra of
pyridine adsorbed at a silver electrode," Chem. Phys. Lett., vol. 26, pp.
163-166, 1974.
[9] K. Kneipp, H. Kneipp, I. Itzkan, R. Dasari, and M. Feld, "Ultrasensitive
chemical analysis by Raman spectroscopy," Chem. Rev., vol. 99, pp
2957-2975, 1999.
[10] I. H. El-Sayed, X. Huang, and M. A. El-Sayed, "Selective laser photothermal
therapy of epithelial carcinoma using anti-EGFR antibody
conjugated gold nanoparticles," Cancer Lett., vol. 239, pp. 129-135,
2006.
[11] T. A. Larson, J. Bankson, J. Aaron, and K. Sokolov, "Hybrid plasmonic
magnetic nanoparticles as molecular specific agents for MRI/optical
imaging and photothermal therapy of cancer cells," Nanotechnology,
vol. 18, pp. 1-8, 2007.
[12] J. S. Shumaker-Parry, H. Rochholz, and M. Kreiter, "Fabrication of
crescent-shaped optical antennas," Adv. Mater., vol. 17, pp. 2131-2134,
2005.
[13] H. Rochholz, N. Bocchio, and M. Kreiter, "Tuning resonances on
crescent-shaped noble-metal nanoparticles," New J. Phys., vol. 9, 53,
2007.
[14] J. Prikulis, P. Hanarp, L. Olofsson, D. Sutherland, and M. Kä1l, "Optical
spectroscopy of nanometric holes in thin gold films," Nano Lett., vol. 4,
pp. 1003-1007, 2004.
[15] D. Gao, W. Chen, A. Mulchandani, and J. S. Schultz, "Detection of
tumor markers based on extinction spectra of visible light passing
through gold nanoholes," Appl. Phys. Lett., vol. 90, 073901, 2007.
[16] Y. Lu, G. L. Liu, J. Kim, Y. X. Mejia, and L. P. Lee, "Nanophotonic
crescent moon structures with sharp edge for ultrasensitive biomolecular
detection by local electromagnetic field enhancement effect," Nano Lett.,
vol. 5, pp. 119-124, 2005.
[17] X. Zhou, S. Virasawmy, W. Knoll, K. Y. Liu, M. S. Tse, and L. W. Yen,
"Profile simulation and fabrication of gold nanostructures by separated
nanospheres with oblique deposition and perpendicular etching,"
Plasmonics, vol. 2, pp. 217-230, 2007.
[18] X. Zhou, W. Knoll, K. Y. Liu, M. S. Tse, S. Oh, and N Zhang, "Design
and fabrication of gold nanostructures with dispersed nanospheres for
localized surface plasmon resonance applications," J. Nanophotonics,
vol. 2, 023502, 2008.
[19] G. Xiang, N. Zhang, and X. Zhou, "Localized surface plasmon
resonance biosensing with large area of gold nanoholes fabricated by
nanosphere lithography," Nanoscale Res. Lett., vol. 5, pp. 818-822,
2010.
[20] X. Zhou, N. Zhang, and C. Tan, "Profile prediction and fabrication of
wet etched gold nanostructures for localized surface plasmon
resonance," Nanoscale Res. Lett., vol. 5, pp. 344-352, 2010.
[21] S. M. Yang, S. G. Jang, D. G. Choi, S. Kim, and H. K. Yu,
"Nanomachining by colloidal lithography," Small, vol. 2, pp. 458-475,
2006.
[22] B. J. Y. Tan, C. H. Sow, T. S. Koh, K. C. Chin, A. T. S. Wee, and C. K.
Ong, "Fabrication of size-tunable gold nanoparticles array with
nanosphere lithography, reactive ion etching, and thermal annealing," J.
Phys. Chem. B, vol. 109, pp. 11100-11109, 2005.
[23] G. Zhang, D. Wang, and H. Möhwald, "Patterning microsphere surfaces
by templating colloidal crystals," Nano Lett., vol. 5, pp. 143-146, 2005.
[24] G. Zhang, D. Wang, and H. Möhwald, "Nanoembossment of Au patterns
on microspheres," Chem. Mater., vol. 18, pp. 3985-3992, 2006.
[25] G. Zhang, D. Wang, and H. Möhwald, "Ordered binary arrays of Au
nanoparticles derived from colloidal lithography," Nano Lett., vol. 7, pp.
127-132, 2007.
[26] T. Jensen, M. Malinsky, C. Haynes, and R. Van Duyne, "Nanosphere
lithography: tunable localized surface plasmon resonance spectra of
silver nanoparticles," J. Phys. Chem. B, vol. 104, pp. 10549-10556,
2000.
[27] A. B. Pawar and I. Kretzschma, "Patchy particles by glancing angle
deposition," Langmuir, vol. 24, pp.355-358, 2008.
[28] A. B. Pawar and I. Kretzschmar, "Multifunctional patchy particles by
glancing angle deposition," Langmuir, vol. 25, pp. 9057-9063, 2009.
[29] X. Zhou, K. Y. Liu, W. Knoll, C. Quan, and N. Zhang, "3D profile
simulation of metal nanostructures obtained by closely-packed
nanosphere lithography," Plasmonics, vol. 5, pp. 141-148, 2010.
[30] T. Endo, K. Kerman, N. Nagatani, H. M. Hiepa, D-K. Kim, Y.
Yonezawa, K. Nakano, and E. Tamiya, "Multiple label-free detection of
antigen-antibody reaction using localized surface plasmon resonancebased
core-shell structured nanoparticle layer nanochip," Anal. Chem.,
vol. 78, pp. 6465-6475, 2006.
[31] T. Endo, K. Kerman, N. Nagatani, Y. Takamura, and E. Tamiya, "Labelfree
detection of peptide nucleic acid-DNA hybridization using localized
surface plasmon resonance based optical biosensor," Anal Chem., vol.
77, pp. 6976-6984, November 2005.
[32] C. R. Yonzon, E. Jeoung, Zou S, G. C. Schatz, M. Mrksich, and R. P.
Van Duyne, "A comparative analysis of localized and propagating
surface plasmon resonance sensors: The binding of Concanavalin A to a
monosaccharide functionalized self-assembled monolayer," J. Am.
Chem. Soc., vol. 126, pp. 12669-12676, 2004.
[33] T. Rindzevicius, Y. Alaverdyan, A. Dahlin, F. Höök, D. S. Sutherland,
and M. Käll, "Plasmonic sensing characteristics of single nanometric
holes," Nano Lett., vol. 5, pp. 2335-2339, 2005.