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Lee SE, Chen Q, Bhat R, Petkiewicz S, Smith JM, Ferry VE, Correia AL, Alivisatos AP, Bissell MJ. Reversible Aptamer-Au Plasmon Rulers for Secreted Single Molecules. NANO LETTERS 2015; 15:4564-70. [PMID: 26039492 PMCID: PMC4545488 DOI: 10.1021/acs.nanolett.5b01161] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Plasmon rulers, consisting of pairs of gold nanoparticles, allow single-molecule analysis without photobleaching or blinking; however, current plasmon rulers are irreversible, restricting detection to only single events. Here, we present a reversible plasmon ruler, comprised of coupled gold nanoparticles linked by a single aptamer, capable of binding individual secreted molecules with high specificity. We show that the binding of target secreted molecules to the reversible plasmon ruler is characterized by single-molecule sensitivity, high specificity, and reversibility. Such reversible plasmon rulers should enable dynamic and adaptive live-cell measurement of secreted single molecules in their local microenvironment.
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Affiliation(s)
- Somin Eunice Lee
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Electrical & Computer Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Corresponding Authors: . Phone: (510) 486-4999. . Phone: (510) 486-4365. . Phone: (734) 764-7054
| | - Qian Chen
- Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry and Materials Science & Engineering, University of California, Berkeley, California 94720, United States
| | - Ramray Bhat
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Molecular Reproduction Development and Genetics, Indian Institute of Science, Bangalore, 560012, India
| | - Shayne Petkiewicz
- Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry and Materials Science & Engineering, University of California, Berkeley, California 94720, United States
| | - Jessica M. Smith
- Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry and Materials Science & Engineering, University of California, Berkeley, California 94720, United States
| | - Vivian E. Ferry
- Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry and Materials Science & Engineering, University of California, Berkeley, California 94720, United States
| | - Ana Luisa Correia
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - A. Paul Alivisatos
- Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute, University of California, Berkeley, California 94720, United States
- Corresponding Authors: . Phone: (510) 486-4999. . Phone: (510) 486-4365. . Phone: (734) 764-7054
| | - Mina J. Bissell
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Corresponding Authors: . Phone: (510) 486-4999. . Phone: (510) 486-4365. . Phone: (734) 764-7054
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Hermes JP, Sander F, Peterle T, Cioffi C, Ringler P, Pfohl T, Mayor M. Direct control of the spatial arrangement of gold nanoparticles in organic-inorganic hybrid superstructures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:920-929. [PMID: 21394907 DOI: 10.1002/smll.201002101] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Indexed: 05/30/2023]
Abstract
The directed assembly of gold nanoparticles is essential for their use in many kinds of applications, such as electronic devices, biological labels, and sensors. Herein an atomic alteration in the molecular structure of ligand-stabilized gold nanoparticles that can shift the interparticle distance up to 1 nm upon covalent coupling to organic-inorganic superstructures is presented. Gold nanoparticles are stabilized by two octadentate thioether ligands and have a mean diameter of 1.1 nm. The ligands contain a central rigid rod varying in length and terminally functionalized with a protected acetylene. The two peripheral functional groups on each particle enable the directed assembly of nanoparticles to dimers, trimers, and tetramers by oxidative acetylene coupling. This is a wet chemical protocol resulting in covalently bound nanoparticles. These organic-inorganic hybrid superstructures are analyzed by transmission electron microscopy, small angle X-ray scattering, and UV/vis spectroscopy. The focus of the comparison here is the subunit, which is anchoring the bridgehead, either a pyridine or benzene moiety. The pyridine-based ligands reflect the calculated length of the rigid-rod spacer in their interparticle distances in the obtained hybrid structures. This suggests a perpendicular arrangement that results from the coordination of the pyridine's lone pair to the gold surface. An atomic variation in the ligand's center leads to smaller interparticle distances in the case of hybrid structures obtained from benzene ligands. This large difference in the spatial arrangement suggests a tangential arrangement of the interparticle bridging structure in the latter case. Consequently a rather flat arrangement parallel to the particle surface must be assumed for the central benzene unit of the benzene-based ligand.
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Affiliation(s)
- Jens P Hermes
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
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Claridge SA, Schwartz JJ, Weiss PS. Electrons, photons, and force: quantitative single-molecule measurements from physics to biology. ACS NANO 2011; 5:693-729. [PMID: 21338175 PMCID: PMC3043607 DOI: 10.1021/nn103298x] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 01/10/2011] [Indexed: 05/19/2023]
Abstract
Single-molecule measurement techniques have illuminated unprecedented details of chemical behavior, including observations of the motion of a single molecule on a surface, and even the vibration of a single bond within a molecule. Such measurements are critical to our understanding of entities ranging from single atoms to the most complex protein assemblies. We provide an overview of the strikingly diverse classes of measurements that can be used to quantify single-molecule properties, including those of single macromolecules and single molecular assemblies, and discuss the quantitative insights they provide. Examples are drawn from across the single-molecule literature, ranging from ultrahigh vacuum scanning tunneling microscopy studies of adsorbate diffusion on surfaces to fluorescence studies of protein conformational changes in solution.
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Affiliation(s)
| | | | - Paul S. Weiss
- California NanoSystems Institute
- Department of Chemistry and Biochemistry
- Department of Materials Science and Engineering
- Address correspondence to
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