on Carbon Nanotube: An X-ray Absorption Near
... features are noted from the TEY. First, π* transition around 285 eV in the nanocomposites is shifted by ∼0.3 eV to lower photon energy from that of MWNTs. The presence of π* transition in MWNT/RuO2 shows that the graphitic framework of the MWNT remains intact upon the coating of RuO2. Thus good elec ...
... features are noted from the TEY. First, π* transition around 285 eV in the nanocomposites is shifted by ∼0.3 eV to lower photon energy from that of MWNTs. The presence of π* transition in MWNT/RuO2 shows that the graphitic framework of the MWNT remains intact upon the coating of RuO2. Thus good elec ...
Thermal properties of graphene: Fundamentals and
... At low temperatures (Figure 2 inset), the specific heat scales as Cp ∼ Td/n for a phonon dispersion of ω ∼ qn in d dimensions.10,21 Thus, the low-temperature specific heat contains valuable information about both the dimensionality of a system and its phonon dispersion.21 The behavior of Cp for an iso ...
... At low temperatures (Figure 2 inset), the specific heat scales as Cp ∼ Td/n for a phonon dispersion of ω ∼ qn in d dimensions.10,21 Thus, the low-temperature specific heat contains valuable information about both the dimensionality of a system and its phonon dispersion.21 The behavior of Cp for an iso ...
APPLIED PHYSICS REVIEWS Ion and electron irradiation
... industrially very important ion implantation onto semiconductors.4 This application motivated further studies of defect production under irradiation because each implanted atom creates many lattice defects in the sample.5 Another important example of a positive effect of irradiation coming from biop ...
... industrially very important ion implantation onto semiconductors.4 This application motivated further studies of defect production under irradiation because each implanted atom creates many lattice defects in the sample.5 Another important example of a positive effect of irradiation coming from biop ...
Thermal Dissipation and Variability in Electrical Breakdown of Carbon Nanotube Devices
... It is presently understood that the thermal boundary conductance 共TBC兲 at CNT interfaces with the environment, substrate, and contacts plays the limiting role in thermal dissipation.10–12 In addition, the interaction of CNTs with the environment may also change their effective thermal conductivity.1 ...
... It is presently understood that the thermal boundary conductance 共TBC兲 at CNT interfaces with the environment, substrate, and contacts plays the limiting role in thermal dissipation.10–12 In addition, the interaction of CNTs with the environment may also change their effective thermal conductivity.1 ...
Chapter 30 A Hierarchical Modeling Approach of Thermal Vias
... One bottleneck of heat dissipation in electronic circuits is the passage through the interconnect layers. Common substrates have a low thermal conductivity in the range of 0.2 . . . 0.5 W/(m · K) (organic substrate) or 1 . . . 100 W/(m · K) (ceramic substrate materials) respectively. Furthermore, th ...
... One bottleneck of heat dissipation in electronic circuits is the passage through the interconnect layers. Common substrates have a low thermal conductivity in the range of 0.2 . . . 0.5 W/(m · K) (organic substrate) or 1 . . . 100 W/(m · K) (ceramic substrate materials) respectively. Furthermore, th ...
Ong MDnanotubeSiO2 prb10
... set the CNT-substrate temperature difference ⌬T to be a fraction of the initial substrate temperature. If ⌬T is too small with respect to the substrate temperature, the relaxation process will be very noisy. On the other hand, if ⌬T is too large with respect to the substrate temperature, it becomes ...
... set the CNT-substrate temperature difference ⌬T to be a fraction of the initial substrate temperature. If ⌬T is too small with respect to the substrate temperature, the relaxation process will be very noisy. On the other hand, if ⌬T is too large with respect to the substrate temperature, it becomes ...
Patterning of Surfaces by Locally Catalyzed Chemical Reactions
... In this thesis, methods for the patterning of surfaces with dierent features (Pd and Co nanoislands, patterns of Cu, and patterns of multiwall carbon nanotubes) from a few nanometers to some tens of micrometers in size have been developed. All three systems studied have in common that a catalyst is ...
... In this thesis, methods for the patterning of surfaces with dierent features (Pd and Co nanoislands, patterns of Cu, and patterns of multiwall carbon nanotubes) from a few nanometers to some tens of micrometers in size have been developed. All three systems studied have in common that a catalyst is ...
CHAPTER 2 Introduction SECTION A
... The interface between a metal (electrode) and an electrolyte solution is considered when trying to gain an impression of the structures and processes that occur in electrochemical systems. Figure 2.1 shows a schematic diagram of the interface structure and the processes. This interface is generally ...
... The interface between a metal (electrode) and an electrolyte solution is considered when trying to gain an impression of the structures and processes that occur in electrochemical systems. Figure 2.1 shows a schematic diagram of the interface structure and the processes. This interface is generally ...
Theoretical prediction of encapsulation and adsorption of platinum
... understanding of the encapsulation behavior of drug molecules into nanotubes is fundamental for the development of nanoscale drug delivery vehicles. Furthermore, there are many other materials which may form single-walled nanotubes, such as carbon, boron nitride and silicon [8], and it is also impor ...
... understanding of the encapsulation behavior of drug molecules into nanotubes is fundamental for the development of nanoscale drug delivery vehicles. Furthermore, there are many other materials which may form single-walled nanotubes, such as carbon, boron nitride and silicon [8], and it is also impor ...
PDF Full-text
... nanophases, comprising metal, metal oxide and other metal-based nanoparticles, such as fullerene-like nanomaterials; and carbon-based nanophases, such as fullerenes, nanodiamonds, carbon nanotubes, and graphene nanostructures. 2. Ionic Liquids Ionic liquids (ILs) are molten salts [2] which are in th ...
... nanophases, comprising metal, metal oxide and other metal-based nanoparticles, such as fullerene-like nanomaterials; and carbon-based nanophases, such as fullerenes, nanodiamonds, carbon nanotubes, and graphene nanostructures. 2. Ionic Liquids Ionic liquids (ILs) are molten salts [2] which are in th ...
III B.Sc. Int.nanomaterials - E
... Powders with typical particle diameters of about 50 µm are placed together with a number of hardened steel or tungsten carbide (WC) coated balls in a sealed container which is shaken or violently agitated. The most effective ratio for the ball to powder masses is five to 10. High-energy milling for ...
... Powders with typical particle diameters of about 50 µm are placed together with a number of hardened steel or tungsten carbide (WC) coated balls in a sealed container which is shaken or violently agitated. The most effective ratio for the ball to powder masses is five to 10. High-energy milling for ...
Carbon nanotube
Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure. Nanotubes have been constructed with length-to-diameter ratio of up to 132,000,000:1, significantly larger than for any other material. These cylindrical carbon molecules have unusual properties, which are valuable for nanotechnology, electronics, optics and other fields of materials science and technology. In particular, owing to their extraordinary thermal conductivity and mechanical and electrical properties, carbon nanotubes find applications as additives to various structural materials. For instance, nanotubes form a tiny portion of the material(s) in some (primarily carbon fiber) baseball bats, golf clubs, car parts or damascus steel.Nanotubes are members of the fullerene structural family. Their name is derived from their long, hollow structure with the walls formed by one-atom-thick sheets of carbon, called graphene. These sheets are rolled at specific and discrete (""chiral"") angles, and the combination of the rolling angle and radius decides the nanotube properties; for example, whether the individual nanotube shell is a metal or semiconductor. Nanotubes are categorized as single-walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs). Individual nanotubes naturally align themselves into ""ropes"" held together by van der Waals forces, more specifically, pi-stacking.Applied quantum chemistry, specifically, orbital hybridization best describes chemical bonding in nanotubes. The chemical bonding of nanotubes is composed entirely of sp2 bonds, similar to those of graphite. These bonds, which are stronger than the sp3 bonds found in alkanes and diamond, provide nanotubes with their unique strength.