Metal-enhanced fluorescence platforms based on plasmonic ordered copper arrays: Wavelength dependence of quenching and enhancement effects

ACS Nano

Volumn 7, Issue 11, 2013, Pages 9997-10010

  Sugawa, Kosuke ^a   Tamura, Takahiro ^a   Tahara, Hironobu ^b   Yamaguchi, Daisuke ^a   Akiyama, Tsuyoshi ^c   Otsuki, Joe ^a   Kusaka, Yasuyuki ^d   Fukuda, Nobuko ^d   Ushijima, Hirobumi ^d  

^a NIHON UNIVERSITY   (Japan)

^b NAGASAKI UNIVERSITY   (Japan)

^c UNIVERSITY OF SHIGA PREFECTURE   (Japan)

^d NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY AIST   (Japan)

Author keywords

copper nanostructures; fluorescence; interband transition; localized surface plasmon resonance; metal enhanced fluorescence; pophyrin; quenching

Indexed keywords

16-MERCAPTOHEXADECANOIC ACID; FLUORESCENCE ENHANCEMENT; INTER-BAND TRANSITION; LOCALIZED SURFACE PLASMON RESONANCE; METAL-ENHANCED FLUORESCENCE; POPHYRIN; PORPHYRIN MONOLAYERS; WAVELENGTH DEPENDENCE;

COPPER; FLUORESCENCE; NANOSTRUCTURES; PORPHYRINS; QUENCHING; SILICA; SURFACE PLASMON RESONANCE; WAVELENGTH;

PLASMONS;

16 MERCAPTOHEXADECANOIC ACID; 16-MERCAPTOHEXADECANOIC ACID; COPPER; GOLD; METAL; METAL NANOPARTICLE; NANOMATERIAL; PALMITIC ACID DERIVATIVE; PORPHYRIN; SILICON DIOXIDE;

ARTICLE; CHEMISTRY; COLLOID; FLUORESCENCE; NANOTECHNOLOGY; PARTICLE SIZE; SURFACE PLASMON RESONANCE; SURFACE PROPERTY; TEMPERATURE;

COLLOIDS; COPPER; FLUORESCENCE; GOLD; METAL NANOPARTICLES; METALS; NANOSTRUCTURES; NANOTECHNOLOGY; PALMITIC ACIDS; PARTICLE SIZE; PORPHYRINS; SILICON DIOXIDE; SURFACE PLASMON RESONANCE; SURFACE PROPERTIES; TEMPERATURE;

EID: 84888877054     PISSN: 19360851     EISSN: 1936086X     Source Type: Journal    
DOI: 10.1021/nn403925d     Document Type: Article

References (91)

1. Lakowicz, J. R. Radiative Decay Engineering: Biophysical and Biomedical Applications Anal. Biochem. 2001, 298, 1-24 (Pubitemid 33030116)
2. Aslan, K.; Gryczynski, I.; Malicka, J.; Matveeva, E.; Lakowicz, J. R.; Geddes, C. D. Metal-Enhanced Fluorescence: an Emerging Tool in Biotechnology Curr. Opin. Biotechnol. 2005, 16, 55-62 (Pubitemid 40253579)
3. Lakowicz, J. R.; Ray, K.; Chowdhury, M.; Szmacinski, H.; Fu, Y.; Zhang, J.; Nowaczyk, K. Plasmon-Controlled Fluorescence: a New Paradigm in Fluorescence Spectroscopy Analyst 2008, 133, 1308-1346
4. Deng, W.; Goldys, E. M. Plasmonic Approach to Enhanced Fluorescence for Applications in Biotechnology and the Life Sciences Langmuir 2012, 28, 10152-10163
5. Xie, F.; Baker, M. S.; Goldys, E. M. Enhanced Fluorescence Detection on Homogeneous Gold Colloid Self-Assembled Monolayer Substrates Chem. Mater. 2008, 20, 1788-1797 (Pubitemid 351560839)
6. Aslan, K.; Lakowicz, J. R.; Geddes, C. D. Rapid Deposition of Triangular Silver Nanoplates on Planar Surfaces: Application to Metal-Enhanced Fluorescence J. Phys. Chem. B 2005, 109, 6247-6251 (Pubitemid 40496836)
7. Aslan, K.; Lakowicz, J. R.; Geddes, C. D. Metal-Enhanced Fluorescence Using Anisotropic Silver Nanostructures: Critical Progress to Date Anal. Bioanal. Chem. 2005, 382, 926-933 (Pubitemid 40890951)
8. Malicka, J.; Gryczynski, I.; Fang, J.; Kusba, J.; Lakowicz, J. R. Photostability of Cy3 and Cy5-Labeled DNA in the Presence of Metallic Silver Particles J. Fluoresc. 2002, 12, 439-447
9. Peng, H.-I.; Strohsahl, C. M.; Leach, K. E.; Krauss, T. D.; Miller, B. L. Label-Free DNA Detection on Nanostructured Ag Surfaces ACS Nano 2009, 3, 2265-2273
10. Wang, Y.; Liu, B.; Mikhailovsky, A.; Bazan, G. C. Conjugated Polyelectrolyte-Metal Nanoparticle Platforms for Optically Amplified DNA Detection Adv. Mater. 2010, 22, 656-659
11. Cheng, Y.; Stakenborg, T.; Dorpe, P. V.; Lagae, L.; Wang, M.; Chen, H.; Borghs, G. Fluorescence Near Gold Nanoparticles for DNA Sensing Anal. Chem. 2011, 83, 1307-1314
12. Shan, Y.; Xu, J.-J.; Chen, H.-Y. Distance-Dependent Quenching and Enhancing of Electrochemiluminescence from a CdS:Mn Nanocrystal Film by Au Nanoparticles for Highly Sensitive Detection of DNA Chem. Commun. 2009, 905-907
13. Aslan, K.; Zhang, Y.; Hibbs, S.; Baillie, L.; Previte, M. J. R.; Geddes, C. D. Microwave-Accelerated Metal-Enhanced Fluorescence: Application to Detection of Genomic and Exosporium Anthrax DNA in <30 seconds Analyst 2007, 132, 1130-1138 (Pubitemid 47628613)
14. Sabanayagam, C. R.; Lakowicz, J. R. Increasing the Sensitivity of DNA Microarrays by Metal-Enhanced Fluorescence Using Surface-Bound Silver Nanoparticles Nucleic Acids Res. 2007, 35, e13
15. Fu, Y.; Lakowicz, J. R. Enhanced Fluorescence of Cy5-Labeled DNA Tethered to Silver Island Films: Fluorescence Images and Time-Resolved Studies Using Single-Molecule Spectroscopy Anal. Chem. 2006, 78, 6238-6245 (Pubitemid 44360138)
16. Aslan, K.; Huang, J.; Wilson, G. M.; Geddes, C. D. Metal-Enhanced Fluorescence-Based RNA Sensing J. Am. Chem. Soc. 2006, 128, 4206-4207
17. Zhang, J.; Matveeva, E.; Gryczynski, I.; Leonenko, Z.; Lakowicz, J. R. Metal-Enhanced Fluoroimmunoassay on a Silver Film by Vapor Deposition J. Phys. Chem. B 2005, 109, 7969-7975 (Pubitemid 40644023)
18. Szmacinski, H.; Murtaza, Z.; Lakowicz, J. R. Time-Resolved Fluorometric Method for One-Step Immunoassays Using Plasmonic Nanostructures J. Phys. Chem. C 2010, 114, 7236-7241
19. Zhang, J.; Fu, Y.; Nowaczyk, K.; Zhao, R. Y.; Lakowicz, J. R. Single-Cell Fluorescence Imaging Using Metal Plasmon-Coupled Probe 2: Single-Molecule Counting on Lifetime Image Nano Lett. 2008, 8, 1179-1186
20. Saha, A.; Basiruddin, S. K.; Sarkar, R.; Pradhan, N.; Jana, N. R. Functionalized Plasmonic-Fluorescent Nanoparticles for Imaging and Detection J. Phys. Chem. C 2009, 113, 18492-18498
21. Zhang, J.; Fu, Y.; Lakowicz, J. R. Fluorescent Metal Nanoshells: Lifetime-Tunable Molecular Probes in Fluorescent Cell Imaging J. Phys. Chem. C 2011, 115, 7255-7260
22. Dulkeith, E.; Ringler, M.; Feldmann, J. Gold Nanoparticles Quench Fluorescence by Phase Induced Radiative Rate Suppression Nano Lett. 2005, 5, 585-589 (Pubitemid 40609724)
23. Dulkeith, E.; Morteani, A. C.; Niedereichholz, T.; Klar, T. A.; Feldmann, J. Fluorescence Quenching of Dye Molecules near Gold Nanoparticles: Radiative and Nonradiative Effects Phys. Rev. Lett. 2002, 89, 203002
24. Barazzouk, S.; Kamat, P. V.; Hotchandani, S. Photoinduced Electron Transfer between Chlorophyll a and Gold Nanoparticles J. Phys. Chem. B 2005, 109, 716-723 (Pubitemid 40183558)
25. Li, Y.-Q.; Guan, L.-Y.; Zhang, H.-L.; Chen, J.; Lin, S.; Ma, Z.-Y.; Zhao, Y.-D. Distance-Dependent Metal-Enhanced Quantum Dots Fluorescence Analysis in Solution by Capillary Electrophoresis and Its Application to DNA Detection Anal. Chem. 2011, 83, 4103-4109
26. Cheng, D.; Xu, Q.-H. Separation Distance Dependent Fluorescence Enhancement of Fluorescein Isothiocyanate by Silver Nanoparticles Chem. Commun. 2007, 248-250 (Pubitemid 46052672)
27. Guzatov, D. V.; Vaschenko, S. V.; Stankevich, V. V.; Lunevich, A. Y.; Glukhov, Y. F.; Gaponenko, S. V. Plasmonic Enhancement of Molecular Fluorescence near Silver Nanoparticles: Theory, Modeling, and Experiment J. Phys. Chem. C 2012, 116, 10723-10733
28. Anger, P.; Bharadwaj, P.; Novotny, L. Enhancement and Quenching of Single-Molecule Fluorescence Phys. Rev. Lett. 2006, 96, 113002
29. Chan, Y.-H.; Chen, J.; Wark, S. E.; Skiles, S. L.; Son, D. H.; Batteas, J. D. Using Patterned Arrays of Metal Nanoparticles to Probe Plasmon Enhanced Luminescence of CdSe Quantum Dots ACS Nano 2009, 3, 1735-1744
30. Kulakovich, O.; Strekal, N.; Yaroshevich, A.; Maskevich, S.; Gaponenko, S.; Nabiev, I.; Woggon, U.; Artemyev, M. Enhanced Luminescence of CdSe Quantum Dots on Gold Colloids Nano Lett. 2002, 2, 1449-1452 (Pubitemid 135706544)
31. Bardhan, R.; Grady, N. K.; Halas, N. J. Nanoscale Control of Near-Infrared Fluorescence Enhancement Using Au Nanoshells Small 2008, 4, 1716-1722
32. Zhang, Y.; Aslan, K.; Previte, M. J.; Geddes, C. D. Metal-Enhanced Fluorescence from Copper Substrates Appl. Phys. Lett. 2007, 90, 173116
33. Wang, Y.; Asefa, T. Poly(allylamine)-Stabilized Colloidal Copper Nanoparticles: Synthesis, Morphology, and Their Surface-Enhanced Raman Scattering Properties Langmuir 2010, 26, 7469-7474
34. Pedersen, D. B.; Wang, S. Surface Plasmon Resonance Spectra of 2.8 ± 0.5 nm Diameter Copper Nanoparticles in Both Near and Far Fields J. Phys. Chem. C 2007, 111, 17493-17499 (Pubitemid 350247221)
35. Zhu, X.; Wang, B.; Shi, F.; Nie, J. Direct, Rapid, Facile Photochemical Method for Preparing Copper Nanoparticles and Copper Patterns Langmuir 2012, 28, 14461-14469
36. Darugar, Q.; Qian, W.; El-Sayed, M. A.; Pileni, M.-P. Size-Dependent Ultrafast Electronic Energy Relaxation and Enhanced Fluorescence of Copper Nanoparticles J. Phys. Chem. B 2006, 110, 143-149 (Pubitemid 43133533)
37. Johnson, P. B.; Christy, R. W. Optical Constants of the Noble Metals Phys. Rev. B 1972, 6, 4370-4379
38. Pastoriza-Santos, I.; Sánchez-Iglesias, A.; Rodríguez- González, B.; Liz-Marzán, L. M. Aerobic Synthesis of Cu Nanoplates with Intense Plasmon Resonances Small 2009, 5, 440-443
39. Wang, H.; Tam, F.; Grady, N. K.; Halas, N. J. Cu Nanoshells: Effects of Interband Transitions on the Nanoparticle Plasmon Resonance J. Phys. Chem. B 2005, 109, 18218-18222 (Pubitemid 41464153)
40. Alves, T. V.; Hermoso, W.; Ornellas, F. R.; Camargo, P. H. C. On the Optical Properties of Copper Nanocubes as a Function of the Edge Length as Modeled by the Discrete Dipole Approximation Chem. Phys. Lett. 2012, 544, 64-69
41. Ye, J.; Verellen, N.; Van Roy, W.; Lagae, L.; Maes, G.; Borghs, G.; Van Dorpe, P. Plasmonic Modes of Metallic Semishells in a Polymer Film ACS Nano 2010, 4, 1457-1464
42. Chowdhury, S.; Bhethanabolta, V. R. Quenching of Fluorescence from CdSe/ZnS Nanocrystal QDs Near Copper Nanoparticles in Aqueous Solution Plasmonics 2011, 6, 735-740
43. Chowdhury, S.; Bhethanabotla, V. R.; Sen, R. Effect of Ag-Cu Alloy Nanoparticle Composition on Luminescence Enhancement/Quenching J. Phys. Chem. C 2009, 113, 13016-13022
44. Oh, M. K.; Baik, H. J.; Kim, S. K.; Park, S. Multiple Surface Plasmon Resonances in Silver and Copper Nanorods J. Mater. Chem. 2011, 21, 19069-19073
45. Kim, D.-K.; Yoo, S. M.; Park, T. J.; Yoshikawa, H.; Tamiya, E.; Park, J. Y.; Lee, S. Y. Plasmonic Properties of the Multispot Copper-Capped Nanoparticle Array Chip and Its Application to Optical Biosensors for Pathogen Detection of Multiplex DNAs Anal. Chem. 2011, 83, 6215-6222
46. Qin, L.-X.; Jing, C.; Li, Y.; Li, D.-W.; Long, Y.-T. Real-Time Monitoring of the Aging of Single Plasmonic Copper Nanoparticles Chem. Commun. 2012, 48, 1511-1513
47. Chan, G. H.; Zhao, J.; Hicks, E. M.; Schatz, G. C.; Van Duyne, R. P. Plasmonic Properties of Copper Nanoparticles Fabricated by Nanosphere Lithography Nano Lett. 2007, 7, 1947-1952 (Pubitemid 47197572)
48. Laibinis, P. E.; Whitesides, G. M. Self-Assembled Monolayers of n-Alkanethiolates on Copper Are Barrier Films That Protect the Metal against Oxidation by Air J. Am. Chem. Soc. 1992, 114, 9022-9028
49. Jennings, G. K.; Laibinis, P. E. Self-Assembled Monolayers of Alkanethiols on Copper Provide Corrosion Resistance in Aqueous Environments Colloids Surf., A 1996, 116, 105-114 (Pubitemid 26288965)
50. Hutt, D. A.; Liu, C. Oxidation Protection of Copper Surfaces Using Self-Assembled Monolayers of Octadecanethiol Appl. Surf. Sci. 2005, 252, 400-411 (Pubitemid 41282691)
51. 2 Nanosphere Surfaces J. Phys. Chem. B 2001, 105, 6907-6915
52. Sugawa, K.; Hirono, S.; Akiyama, T.; Yamada, S. Photocurrent Enhancement Tuned with Plasmonic Resonance in Self-Assembled Monolayers Fabricated on Regularly Arrayed Gold Nanostructures Photochem. Photobiol. Sci. 2012, 11, 318-322
53. Farcãu, C.; Astilean, S. Silver Half-Shell Arrays with Controlled Plasmonic Response for Fluorescence Enhancement Optimization Appl. Phys. Lett. 2009, 95, 193110
54. Mu, W.; Hwang, D.-K.; Chang, R. P. H.; Sukharev, M.; Tice, D. B.; Ketterson, J. B. Surface-Enhanced Raman Scattering from Silver-Coated Opals J. Chem. Phys. 2011, 134, 124312-1-124312-7
55. Stöber, W.; Fink, A.; Bohn, E. Controlled Growth of Monodisperse Silica Spheres in the Micron Size Range J. Colloid Interface Sci. 1968, 26, 62-69
56. Moon, G. D.; Lee, Il T.; Kim, B.; Chae, G.; Kim, J.; Kim, S. H.; M., J.-M.; Jeong, U. Assembled Monolayers of Hydrophilic Particles on Water Surfaces ACS Nano 2011, 5, 8600-8612
57. Kim, T. H.; Kim, H. J.; Lee, T. S.; Lyoo, W. S. Diffraction Color Developed by Self-Assembly of Silica Particle Arrays Mol. Cryst. Liq. Cryst. 2007, 464, 153-159 (Pubitemid 46445593)
58. Goss, C. A.; Charych, D. H.; Majda, M. Application of (3-Mercaptopropyl)trimethoxysliane as a Molecular Adhesive in the Fabrication of Vapor-Deposited Gold Electrodes on Glass Substrates Anal. Chem. 1991, 63, 85-88
59. Farcau, C.; Giloan, M.; Vinteler, E.; Astilean, S. Understanding Plasmon Resonances of Metal-Coated Colloidal Crystal Monolayers Appl. Phys. B: Lasers Opt. 2012, 106, 849-856
60. Kim, J. H.; Ehrman, S. H.; Germer, T. A. Influence of Particle Oxide Coating on Light Scattering by Submicron Metal Particles on Silicon Wafers Appl. Phys. Lett. 2004, 84, 1278-1280
61. Cabrera, N.; Mott, N. F. Theory of the Oxidation of Metals Rep. Prog. Phys. 1948, 12, 163-184
62. Platzman, I.; Brener, R.; Haick, H.; Tannenbaum, R. Oxidation of Polycrystalline Copper Thin Films at Ambient Conditions J. Phys. Chem. C 2008, 112, 1101-1108 (Pubitemid 351262529)
63. Hernandez, J.; Wrschka, P.; Oehrlein, G. S. Surface Chemistry Studies of Copper Chemical Mechanical Planarization J. Electrochem. Soc. 2001, 148, G389-G397
64. Akiyama, T.; Miyazaki, A.; Sutoh, M.; Ichinose, I.; Kunitake, T.; Yamada, S. Fabrication of Porphyrin-Titanium Oxide-Fullerene Assemblies on an ITO Electrode and Their Photocurrent Responses Colloids Surf., A 2000, 169, 137-141 (Pubitemid 30227393)
65. Ichinose, I.; Senzu, H.; Kunitake, T. Stepwise Adsorption of Metal Alkoxides on Hydrolyzed Surfaces: A Surface Sol-Gel Process Chem. Lett. 1996, 831-832
66. 2 and Other Metal Oxide Films with Molecular Precision Chem. Mater. 1997, 9, 1296-1298 (Pubitemid 127471918)
67. 2 Ultrathin Films Anal. Chim. Acta 2013, 779, 72-81
68. Matsuoka, K.; Akiyama, T.; Yamada, S. Step-by-Step Fabrication of Porphyrin-Fullerene Supramolecular Assemblies and Their Photoelectrochemical Properties J. Phys. Chem. C 2008, 112, 7015-7020
69. Chen, Y.; Munechika, K.; Ginger, D. S. Dependence of Fluorescence Intensity on the Spectral Overlap between Fluorophores and Plasmon Resonant Single Silver Nanoparticles Nano Lett. 2007, 7, 690-696 (Pubitemid 46516049)
70. Farcau, C.; Astilean, S. Mapping the SERS Efficiency and Hot-Spots Localization on Gold Film over Nanospheres Substrates J. Phys. Chem. C 2010, 114, 11717-11722
71. Techane, S.; Baer, D. R.; Castner, D. G. Simulation and Modeling of Self-Assembled Monolayers of Carboxylic Acid Thiols on Flat and Nanoparticle Gold Surfaces Anal. Chem. 2011, 83, 6704-6712
72. Lahann, J.; Mitragotri, S.; Tran, T.-N.; Kaido, H.; Sundaram, J.; Choi, I. S.; Hoffer, S.; Somorjai, G. A.; Langer, R. A Reversibly Switching Surface Science 2003, 299, 371-374 (Pubitemid 36120035)
73. Jennings, T. L.; Singh, M. P.; Strouse, G. F. Fluorescent Lifetime Quenching near d = 1.5 nm Gold Nanoparticles: Probing NSET Validity J. Am. Chem. Soc. 2006, 128, 5462-5467
74. Zhang, X.; Marocico, C. A.; Lunz, M.; Gerard, V. A.; Gun'ko, Y. K.; Lesnyak, V.; Gaponik, N.; Susha, A. S.; Rogach, A. L.; Bradley, A. L. Wavelength, Concentration, and Distance Dependence of Nonradiative Energy Transfer to a Plane of Gold Nanoparticles ACS Nano 2012, 6, 9283-9290
75. Luo, S.; Zhang, E.; Su, Y.; Cheng, T.; Shi, C. A Review of NIR Dyes in Cancer Targeting and Imaging Biomaterials 2011, 32, 7127-7138
76. Benson, R. C.; Kues, H. A. Fluorescence Properties of Indocyanine Green as Related to Angiography Phys. Med. Biol. 1978, 23, 159-163 (Pubitemid 8271627)
77. Tam, F.; Goodrich, G. P.; Johnson, B. R.; Halas, N. J. Plasmonic Enhancement of Molecular Fluorescence Nano Lett. 2007, 7, 496-501 (Pubitemid 46383621)
78. Aslan, K.; Lakowicz, J. R.; Geddes, C. D. Rapid Deposition of Triangular Silver Nanoplates on Planar Surfaces: Application to Metal-Enhanced Fluorescence J. Phys. Chem. B 2005, 109, 6247-6251 (Pubitemid 40496836)
79. Sugawa, K.; Kawahara, T.; Akiyama, T.; Kobayashi, M.; Takahara, A.; Yamada, S. Enhanced Absorption and Emission in a Copper Phthalocyanine-Gold Nanoparticle System Assisted by Localized Surface Plasmon Chem. Lett. 2009, 38, 326-327
80. Canesi, E. V.; Capsoni, M.; Karnam, L.; Lucotti, A.; Bertarelli, C.; Zoppo, M. D. Solution Processed, Versatile Multilayered Structures for the Generation of Metal-Enhanced Fluorescence J. Phys. Chem. C 2013, 117, 13197-13201
81. Pompa, P. P.; Martiradonna, L.; Torre, A. D.; Sala, F. D.; Manna, L.; Vittorio, M. D.; Calabi, F.; Cingolani, R.; Rinaldi, R. Metal-Enhanced Fluorescence of Colloidal Nanocrystals with Nanoscale Control Nat. Nanotech. 2006, 1, 126-130
82. Nooney, R. I.; Stranik, O.; McDonagh, C.; MacCraith, B. D.; Gabudean, A. M.; Focsan, M.; Astilean, S. Gold Nanorods Performing as Dual-Modal Nanoprobes via Metal-Enhanced Fluorescence (MEF) and Surface-Enhanced Raman Scattering (SERS) J. Phys. Chem. C 2012, 116, 12240-12249
83. Lohmüller, T.; Iversen, L.; Schmidt, M.; Rhodes, C.; Tu, H.-L.; Lin, W.-C.; Groves, J. T. Single Molecule Tracking on Supported Membranes with Arrays of Optical Nanoantennas Nano Lett. 2012, 12, 1717-1721
84. Ozel, T.; Mizamoglu, S.; Sefunc, M. A.; Samarskaya, O.; Ozel, I. O.; Mutlugun, E.; Lesnyak, V.; Gaponik, N.; Eychmuller, A.; Gaponenko, S. V.; Demir, H. V. Anisotropic Emission from Multilayered Plasmon Resonator Nanocomposites of Isotropic Semiconductor Quantum Dots ACS Nano 2011, 5, 1328-1334
85. Lakowicz, J, R.; Shen, B.; Gryczynski, Z.; D'Auria, S.; Gryczynski, I. Intrinsic Fluorescence from DNA Can Be Enhanced by Metallic Particles Biochem. Biophys. Res. Commun. 2001, 286, 875-879 (Pubitemid 32924854)
86. Zhang, Y.; Dragan, A.; Geddes, C. D. Wavelength Dependence of Metal-Enhanced Fluorescence J. Phys. Chem. C 2009, 113, 12095-12100
87. Fu, Y.; Zhang, J.; Lakowicz, J. R. Largely Enhanced Single-Molecule Fluorescence in Plasmonic Nanogaps Formed by Hybrid Silver Nanostructures Langmuir 2013, 29, 2731-2738
88. Yuan, C. T.; Wang, Y. C.; Cheng, H. W.; Wang, H. S.; Kuo, M. Y.; Shih, M. H.; Tang, J. Modification of Fluorescence Properties in Single Colloidal Quantum Dots by Coupling to Plasmonic Gap Modes J. Phys. Chem. C 2013, 117, 12762-12768
89. Fu, Y.; Zhang, J.; Lakowicz, J. R. Large Enhancement of Single Molecule Fluorescence by Coupling to Hollow Silver Nanoshells Chem. Commun. 2012, 48, 9726-9728
90. Kim, K.-S.; Kim, H.; Kim, J.-H.; Kim, J.-H.; Lee, C.-L.; Laquai, F.; Yoo, S. I.; Sohn, B.-H. Correlation of Micellar Structures with Surface-Plasmon- Coupled Fluorescence in a Strategy for Fluorescence Enhancement J. Mater. Chem. 2012, 22, 24727-24733
91. Zhang, J. H.; Zhan, P.; Wang, Z. L.; Zhang, W. Y.; Ming, N. B. Preparation of Monodisperse Silica Particles with Controllable Size and Shape J. Mater. Res. 2003, 18, 649-653