Characterization of Carbon Aerogels by Transport Measurements. (9999)
Fung, A. W. P., Wang, Z. H., Lu, K., Dresselhaus, M. S., Pekala, R. W.
Carbon aerogels are a special class of low-density microcellular foams. These materials are composed of interconnected carbon particles with diameters of approximately 10 nm. The temperature...
The Temperature Variation of the Thermal Conductivity of Benzene-Derived Carbon Fibers. (9999)
Piraux, L., Nysten, B., Haquenne, A., Issi, J. P., Dresselhaus, M. S.
Chirality dependent frequency shift of radial breathing mode in metallic carbon nanotubes (2008)
Sasaki, K., Saito, R., Dresselhaus, G., Dresselhaus, M. S., Farhat, H., Kong, J.
A phonon frequency shift of the radial breathing mode for metallic single wall carbon nanotubes is predicted as a function of Fermi energy. Armchair nanotubes do not show any frequency shift while...
Curvature induced optical phonon frequency shift in metallic carbon nanotubes (2008)
Sasaki, K., Saito, R., Dresselhaus, G., Dresselhaus, M. S., Farhat, H., Kong, J.
The quantum corrections to the frequencies of the $\Gamma$ point longitudinal optical (LO) and transverse optical (TO) phonon modes in carbon nanotubes are investigated theoretically. The frequency...
Phonon softening in individual metallic carbon nanotubes due to the Kohn anomaly (2007)
Farhat, H., Son, H., Samsonidze, Ge. G., Reich, S., Dresselhaus, M. S., Kong, J.
We have studied the line shape and frequency of the G band Raman modes in individual metallic single walled carbon nanotubes (M-SWNTs) as a function of Fermi level (epsilonF) position, by tuning a...
New directions for nanoscale thermoelectric materials research (2006)
Dresselhaus, M. S., Chen, G., Tang, M. Y., Yang, R. G., Lee, H., Wang, D. Z., ...
Many of the recent advances in enhancing the thermoelectric figure of merit are linked to nanoscale phenomena with both bulk samples containing nanoscale constituents and nanoscale materials...
Structural systematics in boron-doped single wall carbon nanotubes (2004)
Gai, P.L., Stephan, O., McGuire, K., Rao, A.M., Dresselhaus, M.S., Dresselhaus, G.
We report atomic level high resolution transmission electron microscopy (HRTEM), electron nanodiffraction and nano-electron energy loss spectroscopy (nano-EELS) of boron-doped carbon nanostructures...
Nanostructures and energy conversion (2003)
The unique properties of nanostructures associated with their low dimensionality give rise to new opportunities for research on nanoscale heat transfer and energy conversion. Inspired by Majumdar’s...
Nanostructures and energy conversion (2003)
The unique properties of nanostructures associated with their low dimensionality give rise to new opportunities for research on nanoscale heat transfer and energy conversion. Inspired by Majumdar’s...
Jorio,A., Matinaga,F. M., Righi,A., Dantas,M. S. S., Pimenta,M. A., Souza Filho,A. G., ...
We discuss how resonance micro-Raman spectroscopy can determine the electronic and structural properties of individual isolated single-wall carbon nanotubes (SWNTs) that can be further used for...
Making electrical contacts to nanowires with a thick oxide coating (2002)
Cronin, S.B., Lin, Y., Rabin, O., Black, M., Ying, J., Dresselhaus, M.S., ...
Techniques are presented for making ohmic contacts to nanowires with a thick oxide coating. Although experiments were carried out on Bi nanowires, the techniques described in this paper are generally...
Graphitic cones in carbon nanofibres (2002)
Terrones,H., Munoz-Navia,M., Terrones,M., Hayashi,T., Kim,Y. A., Endo,M., ...
Barry,W. T., Diefendorf,R. J., Dresselhaus,M. S., Gray,R. I., Hawthorne,M. F.
A problem exists in the operation of electrical equipment if carbon fibers come in contact with critical electrical circuits when accidentally dispersed into the air by a variety of means. The extent...
Electronic and Optical Properties and Modeling of Intercalated Graphite. (2002)
Dresselhaus,M. S., Dresselhaus,G.
Under this grant a study was carried out of the electronic and optical properties and modeling of intercalated graphite. A major contribution of this work has been the formulation of a model for the...
Raman Scattering from in-Plane Lattice Modes in Low-Stage Graphite-Alkali-Metal Compounds, (2002)
Eklund,P. C., Dresselhaus,G., Dresselhaus,M. S., Fischer,J. E.
Pub. in Physical Review B, v16 n8 p3330-3333. Prepared in cooperation with Pennsylvania Univ., Pa, Grant NSF-DMR76-00678.
Raman Scattering in Graphite-Lithium Intercalation Compounds, (2002)
Eklund,P. C., Dresselhaus,G., Dresselhaus,M. S., Fischer,J. E.
Prepared in cooperation with Moore School of Electrical Engineering, Philadelphia, PA, Grant NSF-DMR76-80994, and Kentucky Univ., Lexington. Dept. of Physics and Astronomy.
Structure-Property Relationships in Intercalated Graphite. (2002)
Dresselhaus,M. S., Dresselhaus,G.
Under this contract a study has been carried out on the electronic, lattice, magnetic, structural, and thermal transport properties of intercalated graphite, including the modeling of these...
Dresselhaus,M. S., Dresselhaus,G., Fischer,J. E., Moran,M. J.
Contents: Structure and Phase Transitions; Carbon Fibers; Spectroscopy; Electronic Structure; Transport Properties; Superconductivity and Magnetism; Synthesis, Batteries and Intercalation Kinetics;...
Structure-Property Relationships in Intercalated Graphite. (2002)
Dresselhaus,M. S., Dresselhaus,G.
Experimental and theoretical studies have been carried out relevant to the structural, lattice electronic, magnetic and superconducting properties of synthetic metals prepared by intercalating...
Synthetic Metals from Intercalated Graphite. (2002)
Dresselhaus,M. S., Dresselhaus,G.
The fourth semi-annual report on 'Synthetic Metals from Intercalated Graphite' gives recent advances in magnetic materials formed from graphite compounds. The materials show clear evidence of...
Synthetic Metals from Intercalated Graphite. (2002)
Dresselhaus,M. S., Dresselhaus,G.
During the six month period April 1, 1985-September 30, 1985, efforts on the Program Synthetic Metals from Intercalated Graphite were largely focused on studies of magnetic graphite intercalation...
Synthetic Metals from Intercalated Graphite. (2002)
Dresselhaus,M. S., Dresselhaus,G.
During the six month period October 1, 1985--March 31, 1986, efforts on the Program 'Synthetic Metals from Intercalated Graphite' were largely focused on studies of magnetic graphite intercalation...
Graphitic cones in carbon nanofibres (2002)
Terrones, H., Munoz-Navia, M., Terrones, M., Hayashi, T., Kim, Y. A., Endo, M., ...
Graphitic cones in palladium catalysed carbon nanofibres (2001)
Terrones,H., Hayashi,T., Munoz-Navia,M., Terrones,M., Kim,Y. A., Grobert,N., ...
Transport Properties of Bi-related Nanowire Systems (2001)
Lin, Y. M., Cronin, S. B., Ying, J.Y., Heremans, J., Dresselhaus, M. S.
We present here an electrical transport property study of Te-doped Bi nanowires, and Bi(1-x)Sb(x) alloy nanowires embedded in a dielectric matrix. The crystal structure of the nanowires were...
Graphitic cones in palladium catalysed carbon nanofibres (2001)
Terrones, H., Hayashi, T., Munoz-Navia, M., Terrones, M., Kim, Y. A., Grobert, N., ...
Thermoelectric figure of merit of Bi/Pb_{1-x}Eu_{x}Te superlattices (2000)
Koga, T., Rabin, O., Dresselhaus, M. S.
An enhanced thermoelectric figure of merit Z_{3D}T is predicted for Bi/(111)Pb_{1-x}Eu_{x}Te superlattices. The values of Z_{3D}T obtained for x≈1 superlattices are 2.31, 1.55, and 1.61 at 300,...
Thermoelectric figure of merit of Bi/Pb_{1-x}Eu_{x}Te superlattices (2000)
Koga, T., Rabin, O., Dresselhaus, M. S.
An enhanced thermoelectric figure of merit Z_{3D}T is predicted for Bi/(111)Pb_{1-x}Eu_{x}Te superlattices. The values of Z_{3D}T obtained for x≈1 superlattices are 2.31, 1.55, and 1.61 at 300,...
Thermoelectric figure of merit of Bi/Pb_{1-x}Eu_{x}Te superlattices (2000)
Koga, T., Rabin, O., Dresselhaus, M. S.
An enhanced thermoelectric figure of merit Z_{3D}T is predicted for Bi/(111)Pb_{1-x}Eu_{x}Te superlattices. The values of Z_{3D}T obtained for x≈1 superlattices are 2.31, 1.55, and 1.61 at 300,...
Pimenta,M. A., Hanlon,E. B., Marucci,A., Corio,P., Brown,S. D. M., Empedocles,S. A., ...
In this work we have studied the dispersion of the disorder-induced (D) and the second-order (G') Raman bands in single wall carbon nanotubes using several laser excitation energies (E laser) in the...
Aharonov-Bohm spectral features and coherence lengths in carbon nanotubes (2000)
Roche, S., Dresselhaus, G., Dresselhaus, M. S., Saito, R.
The electronic properties of carbon nanotubes are investigated in the presence of disorder and a magnetic field parallel or perpendicular to the nanotube axis. In the parallel field geometry, the...
Observation of Individual Josephson Vortices in YBCO Bicrystal Grain-boundary Junctions (2000)
Xin, H., Oates, D. E., Sridhar, S., Dresselhaus, G., Dresselhaus, M. S.
The response of YBCO bicrystal grain-boundary junctions to small dc magnetic fields (0 - 10 Oe) has been probed with a low-power microwave (rf) signal of 4.4 GHz in a microwave-resonator setup. Peaks...
Koga, T., Harman, T. C., Cronin, S. B., Dresselhaus, M. S.
A theoretical investigation of the recently observed enhanced thermoelectric power S in (111)-oriented n-type PbTe/Pb1-xEuxTe multiple-quantum-wells (x≃0.09) has been carried out, including both...
Koga, T., Harman, T. C., Cronin, S. B., Dresselhaus, M. S.
A theoretical investigation of the recently observed enhanced thermoelectric power S in (111)-oriented n-type PbTe/Pb1-xEuxTe multiple-quantum-wells (x≃0.09) has been carried out, including both...
Koga, T., Harman, T. C., Cronin, S. B., Dresselhaus, M. S.
A theoretical investigation of the recently observed enhanced thermoelectric power S in (111)-oriented n-type PbTe/Pb1-xEuxTe multiple-quantum-wells (x≃0.09) has been carried out, including both...
Koga, T., Sun, X., Cronin, S. B., Dresselhaus, M. S.
The concept of carrier pocket engineering is applied to strained Si/Ge superlattices to obtain a large thermoelectric figure of merit ZT. In this system, the effect of the lattice strain at the Si/Ge...
Koga, T., Sun, X., Cronin, S. B., Dresselhaus, M. S.
The concept of carrier pocket engineering is applied to strained Si/Ge superlattices to obtain a large thermoelectric figure of merit ZT. In this system, the effect of the lattice strain at the Si/Ge...
Koga, T., Sun, X., Cronin, S. B., Dresselhaus, M. S.
The concept of carrier pocket engineering is applied to strained Si/Ge superlattices to obtain a large thermoelectric figure of merit ZT. In this system, the effect of the lattice strain at the Si/Ge...
Xin, H., Oates, D. E., Anderson, A. C., Slattery, R. L., Dresselhaus, G., Dresselhaus, M. S.
The effect of the patterning process on the nonlinearity of the microwave surface resistance $R_S$ of YBCO thin films is investigated. With the use of a sapphire dielectric resonator and a stripline...
Size Effects in Carbon Nanotubes (1998)
Endo, M., Ajayan, P. M., Dresselhaus, G., Dresselhaus, M. S.
The inter-shell spacing of multi-walled carbon nanotubes was determined by analyzing the high resolution transmission electron microscopy images of these nanotubes. For the nanotubes that were...
Structure and Phase Transitions in Bromine and Potassium-Mercury Intercalated Graphite, (1998)
Erbil,A., Timp,G., Kortan,A. R., Birgeneau,R. J., Dresselhaus,M. S.
High resolution x-ray scattering and electron microscopy results relevant to the in-plane structure of two prototype graphite intercalation compound (GIC) systems, Br2-GIC and KHgx-GIC, are...
Synthetic Metals from Intercalated Graphite. (1998)
Dresselhaus,M. S., Dresselhaus,G.
During the six month period October 1, 1986 - March 31, 1987, efforts on the Program 'Synthetic Metals from Intercalated Graphite' were largely focused on studies of magnetic and superconducting...
Dresselhaus, M. S., Dresselhaus, G., Solin, S. A.
This volume is a collection of extended abstracts presented at the Symposium on Graphite Intercalation Compounds Keywords: First Principles Calculation of Carbon carbon Bond Lengths for Graphite...
Dresselhaus, M. S., Steinbeck, J.
In this brief review article on liquid carbon, the following topics are considered: the phase diagram of carbon, methods for preparing and characterizing liquid carbon, a survey of what is known...
Size Effects in the Electrical Resistivity of Benzene-Derived Carbon Fibers. (1998)
Dresselhaus, M. S., Sugihara, K.
Tahar and others in the Dresselhaus group previously reported a size effect in the electrical resistivity of benzene-derived carbon fibers with small diameters. A simple theory indicates that the...
Raman Characterization of AsF5-Intercalated Vapor Grown Graphite Fibers. (1998)
Ohana, I., Dresselhaus, M. S., Endo, M., Liu, Y. C.
A great deal of attention has recently been focussed on the very high electrical conductivity reported in arsenic penta fluoride intercalated vapor grown graphite fibers, previously heat treated to...
Microstructure of Thin Intercalated Benezene Derived Graphite Fibers. (1998)
Minami, E., Dresselhaus, M. S., Hao, X., Speck, J. S., Endo, M.
A brief study has been carried out to investigate the structure of pristine and intercalated thin benzene derived graphite fibers. High resolution transmission electron microscopy techniques were...
Anomalous Temperature-Dependent Negative Magnetoresistance in Pregraphitic Carbons. (1998)
Sugihara, K., Dresselhaus, M. S.
Some kinds of pregraphitic carbons exhibit temperature-dependent negative magnetoresistance even at helium temperatures. To account for this anomalous behavior, two assumptions have been introduced....
Electrical Conduction in Thin Film Carbons. (1998)
Sugihara, K., Dresselhaus, M. S.
The interaction between electrons and phonons in a thin carbon film is investigated. Sound wave propagation in a thin carbon film has a small sound velocity and small damping. The scattering of...
Photoconductivity in Carbon Fibers. (1998)
Steinbeck, J., Yu, F., Braunstein, G., Desselhaus, G., Dresselhaus, M.S.
Photoconductivity has been observed in vapor grown graphite fibers with a high quantum efficiency of carriers generated by photons. The photocurrent varies approximately as the square root of the...
Electronic and Structural Studies of Carbon/Carbon Composites, (1998)
Doll, G. L., Sakya, R. M., Nicholls, J. T., Speck, J. S., Dresselhaus, M.S.
Room temperature Raman microprobe x-ray diffraction and electrical resistivity measurements have been performed on carbon/carbon composites made from mesophase pitch which were heat treated at...
Effect of Uniaxial Stress on the Raman Spectra of Graphite Fibers. (1998)
Sakata, H., Dresselhaus, G., Dresselhaus, M. S., Endo, M.
Measurements of the effect of uniaxial stress on the frequency of the zone center optical phonons in heat-treated benzene-derived graphite fibers have been performed using first-order Raman...
Synthetic Metals from Intercalated Graphite. (1998)
Dresselhaus, M. S., Dresselhaus, G.
A summary is presented of research carried out over the three year period October 1, 1984 - September 30, 1987 on the program 'Synthetic Metals from Intercalated Graphite'. The research covers...
Superconductivity and Magnetism in Layered Materials. (1998)
Dresselhaus, M. S., Dresselhaus, G.
During the one year period of this grant October 15, 1987-October 1 4, 1988, efforts on the Program Superconductivity and Magnetism in Layered Materials were largely focused on introduction of our...
Fundamental Studies of Near Surface Modification of Carbon Fibers. (1998)
Dresselhaus, M. S., Dresselhaus, G.
A summary of work carried out under the entire duration of this contract on 'Fundamental Studies of Near Surface Modification of Carbon Fibers' from 9/1/85 to 4/30/90 is presented. Keywords: Carbon...
Basic Optical Studies of High T sub c Oxide Superconductors. (1998)
Dresselhaus, M. S., Dresselhaus, G.
During the 1992-93 year of the research program on Basic Optical Studies of High T sub c Oxide Superconductors, the effort was focused on a number of projects. The collaborative study of the...
Non-Linear Microwave and Fast Optics Studies of YBCO Superconducting Films (1998)
Dresselhaus, M. S., Dresselhaus, Gene
During the period of this contract, the research program, "Non-linear microwave and fast optics studies of YBCO superconducting films" focused on several projects central to the program objectives....
Studies of High-T sub c Superconducting Films for High-Power Microwave Applications (1998)
Dresselhaus, M. S., Oates, D., Sridhar, S.
During the period of this grant, October 15, 1997-April 14, 2001, characterization has been carried out in order to understand microwave properties of grain boundaries. Measurements in an externally...
Electronic Structure and Growth Mechanism of Carbon Tubules. (1998)
Saito, Riichiro, Fujita, Mitsutaka, Dresselhaus, G., Dresselhaus, M. S.
An one-dimensional electronic band structure model for carbon tubules is summarized. the general structure of carbon tubules and fullerenes is projected on a two-dimensional hexagonal lattice sheet...
ESR Study of Activated Carbon Fibers: Preliminary Results. (1998)
DI Vittorio, S. L., Nakayama, A., Enoki, T., Dresselhaus, M. S., Endo, M.
We have carried out electron spin resonance (esr) measurements on activated carbon fibers (acf) with specific surface areas of 3000 and 2000 m^2/g. the esr spectrum of acf in air is extremely broad...
The Transport Properties of Activated Carbon Fibers. (1998)
DI Vittorio, S. L., Dresselhaus, M. S., Endo, M., Issi, J. P., Piraux, L.
The transport properties of isotropic pitch-based carbon fibers with surface area 1000 m2/g have been investigated. we report preliminary results on the electrical conductivity, the...
Photoconductivity of Activated Carbon Fibers. (1998)
Kuriyama, K., Dresselhaus, M. S.
The conductivity and photoconductivity are measured on a high-surface -area disordered carbon material, i.e., activated carbon fibers, to investigate their electronic properties this material is a...
The Low-Temperature Thermal Conductivity of Graphite Fibers. (1998)
Heremans, J., Rahim, I., Dresselhaus, M. S.
The longitudinal thermal conductivity along the axis of graphite fibers is reported in the temperature range 10 to 350 K. The fibers studied were prepared by graphitization of polyacrylonitrile and...
RADIATION DAMAGE ANNEALING KINETICS. (1998)
Author is also with Center for Materials Science and Engineering at MIT. N72-10065.
Microwave and Transport Studies of Superconducting Films of YBCO and Fullerenes. (1997)
Dresselhaus, M. S., Dresselhaus, G.
During the 1995-96 year of the research program on 'Microwave and Transport Studies of Superconducting Films of YBCO and Fullerenes,' the effort was focused on several projects. The main highlight...
Science of Fullerenes and Carbon Nanotubes (1996)
Dresselhaus, M.S., Dresselhaus, G., Eklund, P.C.
Los fullerenes son estructuras altamente simétricas formadas únicamente con átomos de carbono y de dimensiones nanométricas. De ellas la más famosa ha sido la estructura C60. Esta estructura que...
Science of Fullerenes and Carbon Nanotubes (1996)
Dresselhaus, M.S., Dresselhaus, G., Eklund, P.C.
0-12-221820-5
Thermal conductivity of single crystal lanthanum cuprates at very low temperature (1991)
Morelli, D. T., Doll, G. L., Heremans, J., Peacor, S. D., Uher, Ctirad, Dresselhaus, M. S., ...
We have undertaken a study of the thermal conductivity of single crystals of pure and strontium doped lanthanum copper oxide in the temperature range 0.1-6 K. For in plane conduction, all samples...