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Shankar S, Orbach M, Kaminker R, Lahav M, van der Boom ME. Gold Nanoparticle Assemblies on Surfaces: Reactivity Tuning through Capping-Layer and Cross-Linker Design. Chemistry 2016; 22:1728-34. [PMID: 26743768 DOI: 10.1002/chem.201503297] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Sreejith Shankar
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Meital Orbach
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Revital Kaminker
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Michal Lahav
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Milko E. van der Boom
- Department of Organic Chemistry; Weizmann Institute of Science; Rehovot 7610001 Israel
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Ozhikandathil J, Badilescu S, Packirisamy M. Gold nanoisland structures integrated in a lab-on-a-chip for plasmonic detection of bovine growth hormone. JOURNAL OF BIOMEDICAL OPTICS 2012; 17:077001. [PMID: 22894514 DOI: 10.1117/1.jbo.17.7.077001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Three-dimensional gold nanostructures fabricated through a novel convective assembly method are treated thermally to obtain a nanoisland morphology. The new structure is proved to be adequate for the detection of bovine growth hormone, by using an immunoassay method based on the localized surface plasmon resonance band of gold. The nanoisland structures are integrated into a microfluidic device and the spectral measurements are carried out by introducing the device directly in the light beam of a ultraviolet-visible spectrophotometer. The principal motivation for this work is the need for a simple and rapid method of detection of hormone levels in milk and milk products.
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Affiliation(s)
- Jayan Ozhikandathil
- Concordia University, Optical Bio-Microsystems Laboratory, Department of Mechanical and Industrial Engineering, Montreal, H3G 1M8, Canada
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Vaccarello P, Tran L, Meinen J, Kwon C, Abate Y, Shon YS. Characterization of localized surface plasmon resonance transducers produced from Au(25) nanoparticle multilayers. Colloids Surf A Physicochem Eng Asp 2012; 402:146-151. [PMID: 22822292 DOI: 10.1016/j.colsurfa.2012.03.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
This article reports the preparation of gold plasmonic transducers using a nanoparticle self-assembly/heating method and the characterization of the films using scattering-type scanning near-field optical microscopy (s-SNOM). Nanoparticle-polymer multilayer films were prepared by the layer-by-layer assembly on glass slides by alternating exposures to monodisperse Au(25) nanoparticles and ionic polymer linkers. Thermal evaporation of organic matters from the nanoparticle-polymer multilayer films at 600 °C allowed the nanoparticles to coalescence and form nanostructured films. Characterization of the nanostructured films generated from Au(25) nanoparticles using atomic force microscopy (AFM) showed that the films have rounded, small, island-like morphologies (d: 30-50 nm) with a pit in the center of many islands. However, further characterizations with s-SNOM revealed that the produced nanoislands contain a single gold cluster in a pit surrounded by donut-shaped dielectric species. Formation of such a structure is thought to be resulted from the embedding of gold clusters under the reorganized polysiloxane binder coatings and glass surfaces during heat treatment of the Au(25) nanoparticle multilayer films. The nanostructured films displayed strong surface plasmon resonance bands in UV-vis spectra with a peak absorbance occurring at ~545-550 nm. The optical sensing capability of the films was examined using D-glucose-functionalized gold island films with the interaction of Concanavalin A (ConA). The result showed that the adsorption of ConA on island films causes a large change in the LSPR band intensity.
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Affiliation(s)
- Paul Vaccarello
- Department of Chemistry and Biochemistry and California State University, Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840, United States
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Shon YS, Aquino M, Pham TV, Rave D, Ramirez M, Lin K, Vaccarello P, Lopez G, Gredig T, Kwon C. Stability and Morphology of Gold Nanoisland Arrays Generated from Layer-by-Layer Assembled Nanoparticle Multilayer Films: Effects of Heating Temperature and Particle Size. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2011; 115:10597-10605. [PMID: 21625329 PMCID: PMC3102539 DOI: 10.1021/jp110531x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This article reports the effects of heating temperature and composition of nanoparticle multilayer films on the morphology, stability, and optical property of gold nanoisland films prepared by nanoparticle self-assembly/heating method. First, nanoparticle-polymer multilayer films are prepared by the layer-by-layer assembly. Nanoparticle multilayer films are then heated at temperature ranging from 500 °C to 625 °C in air to induce an evaporation of organic matters from the films. During the heating process, the nanoparticles on the solid surface undergo coalescence, resulting in the formation of nanostructured gold island arrays. Characterization of nanoisland films using atomic force microscopy and UV-vis spectroscopy suggests that the morphology and stability of gold island films change when different heating temperatures are applied. Stable gold nanoisland thin film arrays can only be obtained after heat treatments at or above 575 °C. In addition, the results show that the use of nanoparticles with different sizes produces nanoisland films with different morphologies. Multilayer films containing smaller gold nanoparticles tend to produce more monodisperse and smaller island nanostructures. Other variables such as capping ligands around nanoparticles and molecular weight of polymer linkers are found to have only minimal effects on the structure of island films. The adsorption of streptavidin on the biotin-functionalized nanoisland films is studied for examining the biosensing capability of nanoisland arrays.
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Affiliation(s)
- Young-Seok Shon
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
- CORRESPONDING AUTHOR FOOTNOTE. Department of Chemistry and Biochemistry, California State University Long Beach, Long Beach, CA 90840 ,
| | - Michael Aquino
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
- Department of Physics and Astronomy, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - ThienLoc V. Pham
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - David Rave
- Department of Physics and Astronomy, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - Michael Ramirez
- Department of Physics and Astronomy, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - Kristopher Lin
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - Paul Vaccarello
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - Gregory Lopez
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - Thomas Gredig
- Department of Physics and Astronomy, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
| | - Chuhee Kwon
- Department of Physics and Astronomy, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840
- CORRESPONDING AUTHOR FOOTNOTE. Department of Chemistry and Biochemistry, California State University Long Beach, Long Beach, CA 90840 ,
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