Journal ArticleDOI
Band gap fluorescence from individual single-walled carbon nanotubes.
Michael J. O'Connell,Sergei M. Bachilo,Chad B. Huffman,Valerie C. Moore,Michael S. Strano,Erik H. Haroz,Kristy L. Rialon,Peter J. Boul,William H. Noon,Carter Kittrell,Jianpeng Ma,Jianpeng Ma,Robert H. Hauge,R. Bruce Weisman,Richard E. Smalley +14 more
TLDR
At pH less than 5, the absorption and emission spectra of individual nanotubes show evidence of band gap–selective protonation of the side walls of the tube, which is readily reversed by treatment with base or ultraviolet light.Abstract:
Fluorescence has been observed directly across the band gap of semiconducting carbon nanotubes. We obtained individual nanotubes, each encased in a cylindrical micelle, by ultrasonically agitating an aqueous dispersion of raw single-walled carbon nanotubes in sodium dodecyl sulfate and then centrifuging to remove tube bundles, ropes, and residual catalyst. Aggregation of nanotubes into bundles otherwise quenches the fluorescence through interactions with metallic tubes and substantially broadens the absorption spectra. At pH less than 5, the absorption and emission spectra of individual nanotubes show evidence of band gap-selective protonation of the side walls of the tube. This protonation is readily reversed by treatment with base or ultraviolet light.read more
Citations
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Protein functionalized carbon nanomaterials for biomedical applications
Sabrina Feliciano Oliveira,Gili Bisker,Naveed A. Bakh,Stephen L. Gibbs,Markita P. Landry,Michael S. Strano +5 more
TL;DR: The surface immobilization of bio-molecules, including proteins, peptides, and enzymes, is reviewed, and the recent advances in synthesis and applications of these conjugates are presented.
Journal ArticleDOI
Double-walled carbon nanotubes: Challenges and opportunities
TL;DR: This review seeks to comprehensively discuss the synthesis, purification and characterization methods of this novel class of carbon nanomaterials and places an emphasis on the double wall physics that contributes to these structures' complex inter-wall coupling of electronic and optical properties.
Journal ArticleDOI
Single Molecule Detection of Nitric Oxide Enabled by d(AT)15 DNA Adsorbed to Near Infrared Fluorescent Single-Walled Carbon Nanotubes
Jingqing Zhang,Ardemis A. Boghossian,Paul W. Barone,Alina Y. Rwei,Jong-Ho Kim,Dahua Lin,Daniel A. Heller,Andrew J. Hilmer,Nitish Nair,Nigel F. Reuel,Michael S. Strano +10 more
TL;DR: The ability to detect nitric oxide quantitatively at the single-molecule level may find applications in new cellular assays for the study of nitricoxide carcinogenesis and chemical signaling, as well as medical diagnostics for inflammation.
Journal ArticleDOI
Stabilization and Debundling of single-wall carbon nanotube dispersions in N-methyl-2-pyrrolidone (NMP) by polyvinylpyrrolidone (PVP)
Tawfique Hasan,Vittorio Scardaci,Ping-Heng Tan,Aleksey Rozhin,William I. Milne,Andrea C. Ferrari +5 more
TL;DR: In this article, a simple method to stabilize single-wall carbon nanotube (SWNT) dispersions in N-methyl-2-pyrrolidone (NMP) by polyvinylpyrrinolide (PVP) is presented.
Journal ArticleDOI
Electrically driven thermal light emission from individual single-walled carbon nanotubes
David Mann,Yuichiro K. Kato,Anika Kinkhabwala,Eric Pop,Eric Pop,Jien Cao,Xinran Wang,Li Zhang,Qian Wang,Jing Guo,Hongjie Dai +10 more
TL;DR: In this article, a suspended quasi-metallic carbon nanotubes (QM-SWNT) was shown to emit light owing to Joule heating, displaying strong peaks in the visible and infrared, corresponding to interband transitions.
References
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Journal ArticleDOI
CHARMM: A program for macromolecular energy, minimization, and dynamics calculations
Bernard R. Brooks,Robert E. Bruccoleri,Barry D. Olafson,David J. States,S. Swaminathan,Martin Karplus +5 more
TL;DR: The CHARMM (Chemistry at Harvard Macromolecular Mechanics) as discussed by the authors is a computer program that uses empirical energy functions to model macromolescular systems, and it can read or model build structures, energy minimize them by first- or second-derivative techniques, perform a normal mode or molecular dynamics simulation, and analyze the structural, equilibrium, and dynamic properties determined in these calculations.
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MOLSCRIPT: a program to produce both detailed and schematic plots of protein structures
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Journal ArticleDOI
Crystalline Ropes of Metallic Carbon Nanotubes
Andreas Thess,R. S. Lee,Pavel Nikolaev,Hongjie Dai,Pierre Petit,J. Robert,Chunhui Xu,Young Hee Lee,Seong-Gon Kim,Andrew G. Rinzler,Daniel T. Colbert,Gustavo E. Scuseria,David Tománek,John E. Fischer,Richard E. Smalley +14 more
TL;DR: X-ray diffraction and electron microscopy showed that fullerene single-wall nanotubes (SWNTs) are nearly uniform in diameter and that they self-organize into “ropes,” which consist of 100 to 500 SWNTs in a two-dimensional triangular lattice with a lattice constant of 17 angstroms.
Book
Science of fullerenes and carbon nanotubes
TL;DR: In this paper, the authors present a detailed overview of the properties of Fullerenes and their properties in surface science applications, such as scanning tunnel microscopy, growth and fragmentation studies, and chemical synthesis.
Journal ArticleDOI
Constant pressure molecular dynamics simulation: The Langevin piston method
TL;DR: In this paper, a new method for performing molecular dynamics simulations under constant pressure is presented, which is based on the extended system formalism introduced by Andersen, the deterministic equations of motion for the piston degree of freedom are replaced by a Langevin equation; a suitable choice of collision frequency then eliminates the unphysical "ringing" of the volume associated with the piston mass.