Nanomaterials carbon nanotubes

One of the successful apphcations of TERS is for the characterization of nanomaterials and even for the single molecule detections [37, 80-83]. Among the nanomaterials, carbon nanotubes have been extensively studied by TERS [38, 84] and the physical properties such as chirality, diameter, and defects have been investigated. In terms of a spatial resolution, Novotny s group recently reported... 

Nanomaterials, carbon nanotubes, metal nanoparticles/adsorp-tion, electro- and photopolymerization... 

Some studies have shown that certain modification procedures can be used to transform two-electron reduction metalloN4-macrocyclic complexes into hybrid materials with the capability to reduce oxygen to water, either via the direct four-electron transfer pathway or in the series two-electron transfer pathway. Carbon nanomaterials, carbon nanotubes in particular [58-65], have been reported to significantly increase the catalytic oxygen reduction current, with a substantial reduction of the overpotential for ORR reported in some cases, as shown by the examples in Table 7.4. 

Zhu, Z., Garcia-Gancedo, L., Flewitt, A.J., Xie, H., Moussy, F., and Milne, W.I. (2012) A critical review of glucose biosensors based on carbon nanomaterials carbon nanotubes and graphene. Sensors, 12, 5996-6022. 

Applications of Nanomaterials, Carbon-Nanotubes, and Carbon-Nanotube Arrays in Development Batteries... 

Keywords Nanomaterials, Carbon Nanotubes, Drug Delivery, Cancer, Toxicity, Biomedical. 

Nanomaterials (carbon nanotubes (CNT) [115-118], carbon black [119], metal nanoparticles [120,121]) can be incorporated in PDMS to improve its performance in microfluidics and impart superior thermal and electrical conductivity [115, 120] or mechanical flexibility [115]. Other polymers can be admixed as additives into siloxane prepolymer formulation and cured together during the molding step [122]. Microfluidic devices with integrated components (pumps, valves, heaters, sensors, sorters) made of nanocomposite materials exhibit better performance not only as adjustable conductive zones, but also allow for adhesion and immobilization of bioparticles. 

Recently, the utility of inorganic nanoparticles as additives to enhance the polymer performance has been established. Various nano reinforcements currently being developed are nano-clay (layered silicates),cellulose nanowhiskers, ultra fine layered titanate, and carbon nanotubes. Carbon nanotubes, however, are the most promising of the new nanomaterials. Carbon nanotube-based polymer composites are poised to exhibit exceptional mechanical, thermal and electrical properties. ... 

There is currently considerable interest in processing polymeric composite materials filled with nanosized rigid particles. This class of material called "nanocomposites" describes two-phase materials where one of the phases has at least one dimension lower than 100 nm [13]. Because the building blocks of nanocomposites are of nanoscale, they have an enormous interface area. Due to this there are a lot of interfaces between two intermixed phases compared to usual microcomposites. In addition to this, the mean distance between the particles is also smaller due to their small size which favors filler-filler interactions [14]. Nanomaterials not only include metallic, bimetallic and metal oxide but also polymeric nanoparticles as well as advanced materials like carbon nanotubes and dendrimers. However considering environmetal hazards, research has been focused on various means which form the basis of green nanotechnology. 

The force effect is applicable to investigation of the mechanical properties of nanomaterials [28, 29]. We measured TERS spectra of a single wall carbon nanotube (SWCNT) bundle with a metallic tip pressing a SWCNT bundle [28]. Figure 2.13a-e show the Raman spectra of the bundle measured in situ while gradually applying a force up to 2.4 nN by the silver-coated AFM tip. Raman peaks of the radial breathing... 

Since the discovery of SWNTs, they have been expected to become the building blocks of the next generation of functional nanomaterials. However, their strong cohesive property and poor solubility have restricted the use of SWNTs for fundamental and applied research fields. One method to overcome these problems is to make the SWNTs more soluble by wrapping them with polymers [31]. At the same time, the fabrication of high-performance carbon nanotube (CNT)-based composites is driven by the ability to create anisotropy at the molecular level to obtain appropriate functions. 

CNTs have been one of the most actively studied electrode materials in the past few years due to their unique electronic and mechanical properties. From a chemistry point of view, CNTs are expected to exhibit inherent electrochemical properties similar to other carbon electrodes widely used in various electrochemical applications. Unlike other carbon-based nanomaterials such as C60 and C70 [31], CNTs show very different electrochemical properties. The subtle electronic properties suggest that carbon nanotubes will have the ability to mediate electron transfer reactions with electroactive species in solution when used as the electrode material. Up to now, carbon nanotube-based electrodes have been widely used in electrochemical sensing [32-35], CNT-modified electrodes show many advantages which are described in the following paragraphs. 

As the analytical, synthetic, and physical characterization techniques of the chemical sciences have advanced, the scale of material control moves to smaller sizes. Nanoscience is the examination of objects—particles, liquid droplets, crystals, fibers—with sizes that are larger than molecules but smaller than structures commonly prepared by photolithographic microfabrication. The definition of nanomaterials is neither sharp nor easy, nor need it be. Single molecules can be considered components of nanosystems (and are considered as such in fields such as molecular electronics and molecular motors). So can objects that have dimensions of >100 nm, even though such objects can be fabricated—albeit with substantial technical difficulty—by photolithography. We will define (somewhat arbitrarily) nanoscience as the study of the preparation, characterization, and use of substances having dimensions in the range of 1 to 100 nm. Many types of chemical systems, such as self-assembled monolayers (with only one dimension small) or carbon nanotubes (buckytubes) (with two dimensions small), are considered nanosystems. 

The approaches used for preparation of inorganic nanomaterials can be divided into two broad categories solution-phase colloidal synthesis and gas-phase synthesis. Metal and semiconductor nanoparticles are usually synthesized via solution-phase colloidal techniques,4,913 whereas high-temperature gas-phase processes like chemical vapor deposition (CVD), pulsed laser deposition (PLD), and vapor transfer are widely used for synthesis of high-quality semiconductor nanowires and carbon nanotubes.6,7 Such division reflects only the current research bias, as promising routes to metallic nanoparticles are also available based on vapor condensation14 and colloidal syntheses of high-quality semiconductor nanowires.15... 

The process begins with the synthesis of different semiconductor nanomaterials (e.g., single-walled carbon nanotubes and single-crystalline nanowires/... 

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