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Carbon Nanotube Films (carbon + nanotube_film)
Selected AbstractsFast High-Temperature Response of Carbon Nanotube Film and Its Application as an Incandescent DisplayADVANCED MATERIALS, Issue 35 2009Peng Liu Super aligned carbon nanotube (CNT) film shows a fast high-temperature response: the film can be heated to incandescence and cools down in about 1 ms. Using screen printing and laser cutting, an incandescent CNT film array that can dynamically display Chinese characters is fabricated. More applications of the film may be developed based on its fast response. [source] Pseudo 3D Single-Walled Carbon Nanotube Film for BSA-Free Protein ChipsCHEMBIOCHEM, Issue 8 2005Hye Ryung Byon Sweet home for proteins. Single-walled carbon nanotube (SWNT) film treated with CDI,Tween20 (CT) has been used as a substrate for a BSA-free protein chip. In the absence of BSA, which is conventionally applied as a nonspecific binding inhibitor, protein A, biotinylated BSA, and even small peptide such as 3×FLAG immobilized on the CT-functionalized SWNT film substrates recognize their respective counterparts, streptavidin, immunoglobulin G, and antiFLAG. with high specificity. [source] Carbon Nanotube Fibers: Monitoring a Micromechanical Process in Macroscale Carbon Nanotube Films and Fibers (Adv. Mater.ADVANCED MATERIALS, Issue 5 20095/2009) The evaluation of mechanical properties of carbon nanotube (CNT) fibers is inherently difficult. On p. 603, Sishen Xie and co-workers report that Raman scattering,a generic methodology independent of mechanical measurements,can be used to determine the interbundle strength and microscopic failure process for various CNT macroarchitectures. Raman data are used to predict the moduli of CNT films and fibers, and to illustrate the influences of the twisting geometries on the fibers' mechanical performances. [source] Monitoring a Micromechanical Process in Macroscale Carbon Nanotube Films and FibersADVANCED MATERIALS, Issue 5 2009Wenjun Ma The evaluation of mechanical properties of carbon nanotube (CNT) fibers is inherently difficult. Here, Raman scattering,a generic methodology independent of mechanical measurements,is used to determine the interbundle strength and microscopic failure process for various CNT macroarchitectures. Raman data are used to predict the moduli of CNT films and fibers, and to illustrate the influences of the twisting geometries on the fibers' mechanical performances. [source] Controlling the Morphology of Carbon Nanotube Films by Varying the Areal Density of Catalyst Nanoclusters Using Block-Copolymer Micellar Thin Films,ADVANCED MATERIALS, Issue 17 2006D. Bennett The morphologies of carbon nanotube (CNT) thin films are controlled by varying the areal density of catalytic nanoclusters synthesized from a block-copolymer micellar thin film. The morphologies of the CNT films vary from a tangled and sparse arrangement of individual CNTs, through a transition region with locally bunched and self-aligned CNTs, to a rapid growth of thick vertical CNT films (see figure). [source] Terahertz Time Domain Spectroscopy to Detect Low-Frequency Vibrations of Double-Walled Carbon NanotubesEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 27 2010Sunil Kumar Abstract We have measured the frequency-dependent real index of refraction and extinction coefficient (and hence the complex dielectric function) of a free-standing double-walled carbon nanotube film of thickness 200 nm by using terahertz time domain spectroscopy in the frequency range 0.1 to 2.5 THz. The real index of refraction and extinction coefficient have very high values of approximately 52 and 35, respectively, at 0.1 THz, which decrease at higher frequencies. Two low-frequency phonon modes of the carbon nanotubes at 0.45 and 0.75 THz were clearly observed for the first time in the real and imaginary parts of the complex dielectric function along with a broad resonance centred at around 1.45 THz, the latter being similar to that in single-walled carbon nanotubes assigned to electronic excitations. Our experiments bring out a possible application of double-walled carbon nanotube films as a neutral density filter in the THz range. [source] Flexible, Stretchable, Transparent Conducting Films Made from Superaligned Carbon NanotubesADVANCED FUNCTIONAL MATERIALS, Issue 6 2010Chen Feng Abstract A straightforward roll-to-roll process for fabricating flexible and stretchable superaligned carbon nanotube films as transparent conducting films is demonstrated. Practical touch panels assembled by using these carbon nanotube conducting films are superior in flexibility and wearability,and comparable in linearity,to touch panels based on indium tin oxide (ITO) films. After suitable laser trimming and deposition of Ni and Au metal, the carbon nanotube film possesses excellent performance with two typical values of sheet resistances and transmittances (208,, ,,1, 90% and 24,, ,,1, 83.4%), which are comparable to ITO films and better than the present carbon nanotube conducting films in literature. The results provide a route to produce transparent conducting films more easily, effectively, and cheaply, an important step for realizing industrial-scale applications of carbon nanotubes for transparent conducting films. [source] Novel Biomembrane-Mimicking Polymer Surface with Environmental ResponsivenessMACROMOLECULAR RAPID COMMUNICATIONS, Issue 17 2005Hong Tan Abstract Summary: In this article, we designed and synthesized novel segmented poly(carbonate urethane)s containing both hydrophobic fluorinated alkyl group and hydrophilic phosphatidylcholine polar head groups on the side chain. The contact angle measurement, XPS, together with ATR-IR investigation indicated a reversible overturn of the phosphatidylcholine groups with the movement of the hydrophobic fluorinated alkyl groups when the samples were treated in dry air or water. The change in environment from air to water induced a reorganization of the surface in order to minimize the interfacial free energy, resulting in a macroscopic change of surface wettability. The good environmental responsiveness of such biomembrane-mimicking films may find successful applications as biomaterials. Environmentally responsive surface using FPCPCU50 as an example; FPCPCU50 coated on aligned carbon nanotube film and dried in vacuum at 50,°C for 7 h and sample c treated in hot water at 80,°C for 1 h. [source] Terahertz Time Domain Spectroscopy to Detect Low-Frequency Vibrations of Double-Walled Carbon NanotubesEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 27 2010Sunil Kumar Abstract We have measured the frequency-dependent real index of refraction and extinction coefficient (and hence the complex dielectric function) of a free-standing double-walled carbon nanotube film of thickness 200 nm by using terahertz time domain spectroscopy in the frequency range 0.1 to 2.5 THz. The real index of refraction and extinction coefficient have very high values of approximately 52 and 35, respectively, at 0.1 THz, which decrease at higher frequencies. Two low-frequency phonon modes of the carbon nanotubes at 0.45 and 0.75 THz were clearly observed for the first time in the real and imaginary parts of the complex dielectric function along with a broad resonance centred at around 1.45 THz, the latter being similar to that in single-walled carbon nanotubes assigned to electronic excitations. Our experiments bring out a possible application of double-walled carbon nanotube films as a neutral density filter in the THz range. [source] Flexible, Stretchable, Transparent Conducting Films Made from Superaligned Carbon NanotubesADVANCED FUNCTIONAL MATERIALS, Issue 6 2010Chen Feng Abstract A straightforward roll-to-roll process for fabricating flexible and stretchable superaligned carbon nanotube films as transparent conducting films is demonstrated. Practical touch panels assembled by using these carbon nanotube conducting films are superior in flexibility and wearability,and comparable in linearity,to touch panels based on indium tin oxide (ITO) films. After suitable laser trimming and deposition of Ni and Au metal, the carbon nanotube film possesses excellent performance with two typical values of sheet resistances and transmittances (208,, ,,1, 90% and 24,, ,,1, 83.4%), which are comparable to ITO films and better than the present carbon nanotube conducting films in literature. The results provide a route to produce transparent conducting films more easily, effectively, and cheaply, an important step for realizing industrial-scale applications of carbon nanotubes for transparent conducting films. [source] Tunable Carbon Nanotube Thin-Film Transistors Produced Exclusively via Inkjet PrintingADVANCED MATERIALS, Issue 36 2010Haruya Okimoto Low-cost green manufacturing of single-walled carbon nanotube films via precisely controlled inkjet printing is demonstrated. This type of transistor exceeds the performance of conventional organic transistors, both in mobility and the on/off ratio. The production of exclusively inkjet-printed SWCNT transistors with printable ionic-liquid gate dielectrics is also shown. [source] | |||||||||||||