toward nanomaterials structural energetic and reactivity aspects of single walled carbon nanotubes
Báo cáo hóa học: " Studying the local character of Raman features of single-walled carbon nanotubes along a bundle using TERS" potx
... spectroscopy applied to single- walled carbon nanotubes Chem Phys Lett 2005, 410:136 Hartschuh A, Qian H, Meixner AJ, Anderson AJ, Novotny L: Nanoscale optical imaging of single- walled carbon nanotubes J ... AJ, Anderson N, Novotny L: Nanoscale Optical Imaging of Excitons in Single- Walled Carbon Nanotubes Nano Lett 2005, 5:2310 11 Roy D, Williams C: High resolution Raman imaging of single wall carbon ... probed the variation of the Raman signal of SWCNTs at seven different positions along a bundle The TERS intensity of G-mode in carbon nanotubes is strongly dependent on the height of the bundle Moreover,...
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Báo cáo hóa học: " A Temperature Window for the Synthesis of Single-Walled Carbon Nanotubes by Catalytic Chemical Vapor Deposition of CH4 over Mo2-Fe10/MgO Catalyst" pptx
... which represent the existence of SWCNTs are hardly shown The data show no SWCNTs are formed and there are only poorly multi -walled carbon nanotubes (MWCNTs) and organized carbon in the sample The ... °C, more and more amorphous carbons are formed in the SWCNTs bundles due to the self-decomposition of CH4 The temperature window of SWCNTs efficiently growth is between 800 and 950 °C, and the ... region (100–300 cm-1), two outstanding RBM bands are presented According to the formula [14], the peaks at 147 and 169 cm-1 correspond to the SWCNTs with diameter of 1.59 and 1.38 nm, respectively...
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Báo cáo hóa học: " Effect of Purity and Substrate on Field Emission Properties of Multi-walled Carbon Nanotubes" pdf
... purity of the MWNT and the presence of the graphitized layer between the nanotubes and carbon paper in Sample C The absence of the graphitized layer between the MWNT and carbon paper in samples B and ... graphitized carbon paper is a double layer structured gas diffusion layer porous carbon paper which consists of a macroporous layer of carbon fiber paper (SGL, Germany) and a microporous layer of carbon ... characteristics of as-grown MWNT spin coated over carbon paper with and without graphitic layer (sample A and sample B) and that of purified MWNT spin coated over carbon paper with and without graphitic...
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development of an ozone gas sensor using single - walled carbon nanotubes
... Eriksson, Effect of ozone oxidation on single- walled carbon nanotubes, J Phys Chem B 110 (2006) 7113–7118 J Li, Y Lu, Q Ye, M Cinke, J Han, M Meyyappan, Carbon nanotube sensors for gas and organic ... E.C Dickey, P.C Eklund, Debundling and dissolution of single- walled carbon nanotubes in amide solvents, J Am Chem Soc 126 (2004) 6095–6105 N Sano, F Ohtsuki, Carbon nanohorn sensor to detect ozone ... 65 (2007) 263–268 W.L Yim, J.F Liu, A reexamination of the chemisorption and desorption of ozone on the exterior of a (5,5) single- walled carbon nanotube, Chem Phys Lett 398 (2004) 297–303 N.I...
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Báo cáo hóa học: " Grafting of 4-(2,4,6-Trimethylphenoxy)benzoyl onto Single-Walled Carbon Nanotubes in Poly(phosphoric acid) via Amide Function" pot
... polymerization of phenoxybenzoic acids [11] and functionalization of closely related carbon materials such as vapor-grown multi -walled carbon nanofibers (MWCNFs) [12, 13] and multi -walled carbon nanotubes ... Results and Discussion Without purification, most of the as-prepared SWCNTs contain approximately 60–70 wt% of impurities such as carbonaceous fragments, amorphous carbons, and small amount of graphite ... implies the higher purity of SWCNTs The TEM image of the as-received SWCNTs shows that there are large portions of carbonaceous and metallic impurities (Fig 1c) On the other hand, the PPA treated...
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Báo cáo hóa học: " Effects of Gas Composition on Highly Efficient Surface Modification of Multi-Walled Carbon Nanotubes by Cation Treatment" pptx
... presence of carbon and oxygen on the treated and untreated samples are normalized with respect 123 236 Nanoscale Res Lett (2009) 4:234–239 Fig a SEM and b TEM images of the pristine MWCNTs, c SEM, and ... rate of 10 °C/min and an air flow of 60 mL/min Raman spectroscopy (Jobin YVON LabRam HR800) was used to evaluate structural defects in the CNTs Results and Discussion Experimental Samples of pristine ... the control of gas flow ratio Furthermore, the manner in which the gas conditions correlate with morphology and structural changes of the nanotubes will be studied through the use of some advanced...
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Báo cáo hóa học: " Symmetry Properties of Single-Walled BC2N Nanotubes" pdf
... common divisor of 2n þ m and 2m þ n ; d is 0 the greatest common divisor of n and m ; SN/d and SN are the screw-axis operations with the orders of N/d and N, respectively The point group of the line ... BC2N nanotubes were discussed based on line group All BC2N nanotubes possess nonsymmorphic line groups, just like carbon nanotubes [8] and boron nitride nanotubes [11] Contrary to carbon and boron ... divisor of 2n þ m and 2m þ n ; d is 0 the greatest common divisor of n and m The BC2N sheets corresponding to ZZ-2 and AC-2 are shown in Fig 4a and b, which are chiral in nature The rv and rh...
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Báo cáo hóa học: " Boron and Nitrogen Doped Single walled Carbon Nanotubes as Possible Dilute Magnetic Semiconductors" doc
... (2007) 2:447–449 Table Calculated total energy of singlet and triplet state for boron and nitrogen doped single wall zig-zag and armchair carbon nanotubes Formula Type C68B2 Armchair Method Total ... energy between the singlet and doublet states The + sign means the triplet state has lower energy than the singlet state Fig (a) Optimized structure of C68B2 armchair single walled carbon nanotube ... carbon nanotube (b) optimized structure of zig-zag C68B2 single walled carbon nanotube Methods and Results The structures at minimum energy of zig-zag (7,0) and armchair (5,5) tubes are obtained...
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Báo cáo khoa hoc:" Effects of multi-walled carbon nanotubes (MWCNT) under Neisseria meningitidis transformation process" pps
... Y and W135 are the most frequently found in invasive infections The capsule of serogroups B, C, Y and W135 strains is composed of either homopolymers (B and C) or heteropolymers (Y and W135) of ... action of MWCNT in the transformation of serogroup C N meningitidis against two different DNA obtained from isogenic mutants of this microorganism Methods Synthesis of multi -walled carbon nanotubes ... amounts of DNA(1µg) from M2 and M6 mutants, MWCNT (20 µg) and bacterial cells were submitted to action 5U of DNase (New England Biolabs, UK) and further transformation process Also, the counts of...
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Effect of multi walled carbon nanotubes loaded with ag nanoparticles on the
... radius of MWNTs is between and 10 nm and the Ag NPs deposit on the MWNTs For the Ag/MWNTs- P (Fig 1a), the size of Ag NPs is smaller (ca nm), some of them could enter the cavities of MWNTs and deposit ... attraction of negatively charged silver and positively charged cationic radical of RhB So the presence of optimal content of Ag NPs, here is 3.0 wt%, can reduce the possibility of excitons quenching and ... synthesis of single- walled carbon nanotube and metal nanoparticle assemblies in solution, J Am Chem Soc 128 (2006) 15078–15079 [31] V Lordi, N Yao, J Wei, Method for supporting platinum on single- walled...
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Tài liệu Báo cáo khoa học: Structural and mechanistic aspects of flavoproteins: electron transfer through the nitric oxide synthase flavoprotein domain pdf
... accurate measure of the koff parameter in CaM-bound eNOS and nNOS [58], and thus prevented assessment of the relative importance of conformational change rates versus rates of FMNH2 formation ... steps in the nNOS and eNOS flavoproteins (dissociation and association of the 4-electron reduced FNR–FMN subunit complex, kon and koff in Fig 5) Remarkably, the results suggest that koff is the sole ... in the CaM-free nNOS and eNOS, the rate of FMNH2 formation appears to be relatively fast and not rate limiting, and instead a specific conformational step (koff, dissociation of the reduced FMN...
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Tài liệu Báo cáo khoa học: Structural and mechanistic aspects of flavoproteins: probes of hydrogen tunnelling pptx
... arises because of differences in the mass, frequency and consequently the transfer distance of H and D Experimentally, the identification of promoting vibrations is extremely challenging and, as yet, ... ½NADðPÞH ðkoff =kon Þ þ ½NADðPÞH ð7Þ In both MR and PETNR, at room temperature, kon, the apparent rate of coenzyme binding is $106 m)1Æs)1 The rate of NAD(P)H dissociation, koff, is $102 s)1 and the ... reaction Stopped-flow traces of the observed FMN reduction during the reaction of the wild-type (wt) and N189A mutant of MR with NADH The wt trace is fit to a single exponential and the N189A trace to...
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Tài liệu Báo cáo khoa học: Structural and mechanistic aspects of flavoproteins: photosynthetic electron transfer from photosystem I to NADP+ doc
... flavins and pyridine nucleotides is highly dependent on the approach and colinear orientation of the N5 of the flavin, the hydride to be transferred, and C4 of the nicotinamide In FNR, displacement of ... N(5) and the NH of V59, in favour of a stronger H-bond between the carbonyl of N58 (‘O-up’ conformation) and FMN N(5)H [41] The semiquinone states of A nidulans and Anabaena Flds are less stable ... production of alternative structures for each protein The fine-tuning of the enzyme catalytic efficiency is governed by the distance between and mutual orientation of the N5 of FAD and the nicotinamide...
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Báo cáo khoa học: Structural and functional aspects of unique type IV secretory components in the Helicobacter pylori cag-pathogenicity island potx
... a-helices and a final b-strand, F, which protrudes from the core of the monomer and runs anti-parallel to the same strand of a second monomer, allowing for the formation of the dimer The surface of interaction ... glutamate and aspartate residues confined to the portion of the molecule involving a-helix A, the nearby loop, the first and last turns of helices E and F, and the C-terminus helices I and J In ... Helices B, E, F and H, arranged in an up -and- down topology, form the structural core, whereas the short helices C, D and G on one side, and A, I and J on the other, represent types of appendices,...
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Báo cáo y học: "Structural and functional aspects of liver sinusoidal endothelial cell fenestrae: a review" ppsx
... diameter and number of fenestrae vary from species to species, but also between individuals of a species, and within a single individual under the influence of various physiological and pharmacological ... formation of sieve plates The study of the luminal cell membrane of freeze-fractured LSEC revealed the presence of trabecular meshworks which were attached to the E and P-faces of the cell membrane of ... Tsuchiya M: Roles of plasma membrane Ca++ – ATPase in the relaxation and contraction of hepatic sinusoidal endothelial fenestrae – effects of prostaglandin E1 and endothelin In: Cells of the Hepatic...
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Synthetic, structural and reactivity studies of indenyl ruthenium complexes
... understanding of the effect of co-ligands in Ru complexes on the ease of ring slippage of the indenyl ligand, on the catalytic activity of [(Ind)Ru] complexes and the redox potentials of the ... hydrocarbon ligands, other donor ligands (e.g O-, Nand S-donor ligands) have scarcely been explored M.R Kollipara and co-workers recently reported the reactivity of [IndRu(PPh3)2] complexes towards ... comparison of the chemistry of [(Ind)Ru] complexes with their Cp analogues 62 21 Chapter Reactivity studies of [(Ind)Ru] complexes with P-, N- and S-containing ligands Chapter Reactivity studies of [(Ind)Ru]...
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Ethical and social aspects of evaluating fetal screening
... emphasize the health of the newborn population, public health or the health level of a given society And then we would have to face the dilemma of eugenics Ethical and social aspects of evaluating ... perspective of consequences and control The myth of the objectivity of research is strong among health and economic researchers, and they may Wnd the explicit value requirements of ethics diYcult ... its group of target individuals What can be done? The current state of aVairs where the value of a health technology is judged only on the basis of some of its consequences, and the use of the technology...
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Tài liệu Information in use and outsourcing aspects of digital doc
... different aspects which we think are of great importance, namely aspects of information quality in workflows where digital services are a vital part and also in- and outsourcing aspects of digital ... engineering and validation of business processes PREFACE Life is strange and unpredictable, and the last two years of my life have been evidence of this In 2005, I felt unrestrained joy and happiness ... regulation and supervision of the development, manufacturing and sale of drugs and other medicinal products Their task is to ensure that both the individual patient and healthcare professionals...
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Tài liệu PHYSICAL AND CHEMICAL ASPECTS OF ORGANIC ELECTRONIC doc
... various aspects of OFETs, including the synthesis of new materials, preparation and characterisation of organic thin films, characterisation of device properties and the development of new device ... 3, by Brinkmann et al.) Section III: Structural and Morphological Aspects The third part of the book concentrates on structural and morphological aspects of thin organic layers deposited on solid ... fundamental understanding of the basic mechanism and properties of such OFETs, a national research initiative (supported by the DFG within the framework of the focus program 1121 OFET) was established...
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Tài liệu Pathophysiology and Clinical Aspects of Venous Thromboembolism in Neonates, Renal Disease and Cancer Patients Edited by Mohammed A. Abdelaal ppt
... described) and ABCA1, a member of the ATP-binding cassette family of transporters, is a potential candidate for the transport of PS to the surface (Diaz and Schroit 1996, Morel, et al 2006) 2.2 Role of ... irrespective of size However interference of soluble antigens, variable quality of antibodies used for antigen capture and non-exclusion of microsomes are some of the disadvantages 4.3 Nanoscale and newer ... development of thromboembolism in neonates Also, the hemostatic system of neonates is significantly different from that of children and adults (Veldman, 2008) 38 Pathophysiology and Clinical Aspects of...
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- physical and technical aspects of angiography and interventional radiology
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- synthesis and purification of multi walled and single walled carbon nanotubes
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- formation mechanism of 0 4nm single walled carbon nanotubes in coapo 5 single crystals
- structural and functional aspects of viroporins in human respiratory viruses respiratory syncyt
- addressing the business and human aspects of a low carbon technology revolution
- ultra small single walled carbon nanotubes and their novel properties
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