capillarity in carbon nanotubes

... thinking Because of the synthesis impairment, acetylcholine is decreased in the neurons in the Alzheimer disease brain, leading to the incapability of learning, memory, and thinking Providing ... targeting of carbon nanotubes in mice Nat Nanotechnol 2007, 2:47-52 56 Liu Z, Tabakman S, Welsher K, Dai H: Carbon nanotubes in biology and medicine in vitro and in vivo detection, imaging and ... considered for obtaining desired treatment effects The studied ways of CNT administration include oral and injections such as subcutaneous injection, abdominal injection, and intravenous injection There...

Ngày tải lên: 20/06/2014, 22:20

... 81.05.Qk; 81.07.Pr Introduction Due to the increasing importance of energy dissipation in the electronic industry, thermal conductivity of cured epoxy resins has been widely investigated over ... existence of intertube Umklapp scattering processes In addition, SWNTs exhibit a higher number of phonon vibrational modes and a lower defect density in relation to MWNTs, leading to a higher intrinsic ... transferred from the nanotube crystalline structure into the insulating polymer matrix This behavior has already been observed in cured resins [27, 28], but not in the pre-cured state The addition...

Ngày tải lên: 20/06/2014, 23:20

... samples were imbedded in KBr disks Elemental analysis (EA) was performed by using a CE Instruments EA1110 The melting points (mp) were determined on a Mel-Temp melting point apparatus and are ... was conducted both in air and nitrogen atmospheres with a heating rate of 10 °C/min using a Perkin–Elmer TGA7 The field emission scanning electron microscopy (FE-SEM) used in this work was a LEO ... without causing the sidewall opening and breaking of the stable crystalline carbon particles This implies that PPA can selectively destroy the amorphous carbons Unlike SWCNTs treated in hydrochloric...

Ngày tải lên: 22/06/2014, 00:20

... sp2bonded carbon atoms in the two-dimensional hexagonal lattice of the graphite layer In addition, the G-band indicates the degree of crystallinity in the graphite structure, whereas the intensity ... Amorphous carbon and carbonaceous particles were decreased and denser vertically aligned MWCNTs were obtained for a higher flow rate pretreatment, as shown in Fig In addition, the MWCNTs shown in Fig ... H2 gas [20] in plasma treatment can provide extra exciting H2 (H*) Therefore, much higher carbon productivity is obtained in the presence of H2 The structure of MWCNTs, which is obtained from the...

Ngày tải lên: 22/06/2014, 01:20

... irregular, having different periodicities in different parts and being asymmetric with VD, which points to a non-ideal Fabry–Perot interference pattern due to minor disorder or inhomogeneity ... inner tubes The continuously switching between two electronic states can be attributed to the locally orientational depinning or melting of a small part of inner tube at certain temperature (TOM, ... shown in the inset of Fig 3a, the conductance behaves completely different as temperature is cooled down in different thermal cycles: decreases in the first cooling process (black curve), but increases...

Ngày tải lên: 22/06/2014, 01:20

... University of Singapore, for kindly providing platinum(IV) compounds, and Prof RAMAPRABHU Sundara, Indian Institute of Technology, Madras, India, for providing ultrapure multi-walled carbon nanotubes ... established a variety of loading strategies, mainly including (a) chemical binding to external surface, (b) π-π stacking on both internal and external surface, (c) encapsulation into inner cavity, etc., ... Chapter Introduction In 2005, Ajima et al first reported the entrapment of CDDP within oxidised singlewalled carbon nanohorns (SWCNHox), finding that the CDDP clusters were maintained inside the...

Ngày tải lên: 08/09/2015, 18:10

... Part II Carbon nanotubes as nanofillers Allotropic forms of Carbon Curl, Kroto, Smalley 1985 graphene Iijima 1991 (From R Smalley´s web image gallery) Carbon Nanotubes - Single-wall nanotubes ... Advantages : temperature, the insert gas, pressure, gas flow, catalyst, etc – Insert hydrocarbon gas (C2H2, C2H4, CH4, etc) into quartz tube and obtain Energy  insert gas decomposed and CNT ... cohesion between nanotubes nm TEM of SWNTs : axial view Bundle-like aggregation maintained upon melt blending within polymer matrix Bundle-like aggregates EVA + MWNT’s 500 nm The Processing Challenge...

Ngày tải lên: 23/10/2013, 19:15

... studied the binding of pristine fullerene complexed with cyclodextrin on bovine serum albumin protein demonstrating that the binding is a multistep process First, the cyclodextrin dissociation ... the work Printed on acid-free paper springer.com Preface The emerging field of nanotechnology is affirming its increasing importance day by day In this context fullerenes and carbon nanotubes ... experiments in in vitro agarose gel infusion and in vivo infusion in rat brain have been carried out (Fatouros et al., 2006) In this case Gd3N@C80, functionalized with PEG and hydroxyl groups, was examined...

Ngày tải lên: 17/02/2014, 05:20

... on single nanotubes, characterized for their diameter and chirality Interesting effects can be observed in carbon nanotubes for diameters in the range 1-20 nm, depending Physics of carbon nanotubes ... affected Initial studies of the problem indicated that linking between the inner and outer walls is not, in general, a hindered process Pyrolytic carbon nanotubes from vapor-grown carbon fibers ... properties of 1D carbon nanotubes are seen to arise predominately from intralayer interactions, rather than from interlayer interactions between multilayers within a single carbon nanotube or...

Ngày tải lên: 05/03/2014, 15:21

... Electrical Transport Properties in Carbon Nanotubes J -P Issi and J -C Charlier 107 Chapter 11 Capillarity in Carbon Nanotubes D Ugarte, T Stockli, J.-M Bonard, A Chatelain and W A de Heer ... bridging function over classical and quantum mechanics It is quite natural that human beings living in macroscopic world could hardly grasp the phenomena occurring in the microscopic world in an intuitive ... with Hamada i indices (40+8k, S+k) with k=0, ,9 In (a), (al) and (a2) the initial stacking at q0 was ABAB whereas in (b), (bl) and (b2) the initial stacking was random (a) The normal incidence pattern...

Ngày tải lên: 05/03/2014, 17:20

... 0.2 0.6 0.5 0.4 0.3 % carbon black loading % carbon black loading % carbon black loading 0.1 (b) 0.7 % carbon black loading 0.2 % carbon black loading % carbon black loading 0.1 0.0 0.0 10 20 ... % carbon black loading 0.2 10 20 30 40 50 Square root of time, (h0.5 ) 60 0.6 % carbon black loading % carbon black loading % carbon black loading 0.2 0.0 0.8 0.4 % carbon black loading % carbon ... Weight change, % 0.7 % carbon black loading % carbon black loading 0.5 0.4 0.3 (b) 0.5 0.4 0.3 0.2 % carbon black loading 0.2 (a) 0.1 % carbon black loading % carbon black loading 0.1 0.0 0.0 0 10...

Ngày tải lên: 14/03/2014, 13:20

... resolution TEM images revealed that Si NW with carbon coating consisted of a single crystalline Si core and a sheath of carbon mutilayers with an inter-layer spacing of 0.34 nm (Fig 3a) The multi-walled ... also found to co-exist during the carbon coating processes Fig 2b showed a TEM image of the same sample and its corresponding SAED pattern The di€raction rings of crystalline cubic Si and b-SiC ... upper image in Fig 4a A typical nanowire in high magni®cation was shown more clearly in the left bottom image in Fig 4a As the deposition temperature increased to 1300°C, the coated carbon grew...

Ngày tải lên: 16/03/2014, 15:04

... Electronic Engineering, University of Seoul, Seoul, Korea, in 1988, and the Ph.D degree in semiconductor engineering from Korea University, Seoul, in 1995 In 1988, he joined the Korea Institute of ... currently working toward his M.S degree His research interests are carbon nanotubes based gas sensor and nanoimprint lithography Ki-Young Dong received his B.S in School of Electrical Engineering from ... University in 2007 From 2007, he is a master course in the program in micro/nano system, Korea University His research interests are carbon nanotubes based gas sensor and nanoimprint lithography 411 Jinwoo...

Ngày tải lên: 19/03/2014, 16:47

... 3:7 in mole) shows the diffraction peaks of solid solution following Vegard’s law Dot lines indicate SnO2 rutile peaks and dash lines indicate TiO2 rutile peaks Table The interplanar spacing ... sputtering methods [5] The solution is formed by mixing SnO2 and TiO2 lattices in the rutile phase in which both the materials are in the tetragonal structure From XRD peaks, we get the inter-planar ... using a Bruker-AXS D5005 2.2 Gas sensor fabrication and testing The fabrication of the gas sensor was carried out in the following manner: (i) the inter-digitated electrode was fabricated using...

Ngày tải lên: 20/03/2014, 13:04

... was introduced when room temperatures detection of hazardous gases was desired, consisting in embedding a low amount of metal decorated (Ag, Au) carbon nanotubes into the hex-WO3 matrix Indeed, ... Electronics, Electrical and Automatic Engineering, Rovira i Virgili University, Tarragona, Spain His main research interests are in the field of chemical gas sensors, carbon nanotubes and pattern recognition ... stirring the solution in an ultrasonic bath for h at 75 ◦ C The resulting paste was then dropped onto the micromachined silicon membranes by using a microinjector (JBE1113 Dispenser, I&J FISNAR Inc.,...

Ngày tải lên: 20/03/2014, 13:05

... and V2O5 coated carbon nanotubes were obtained Transition-metal ions were added to the SiO2 coated carbon nanotubes by mixing the carbon nanotubes in a TEOS/ethanol solution containing transition-metal ... SiO2, Al2O3, and V2O5 nanotubes [68-70] The SiO2 coating was obtained by stirring the functionalized carbon nanotubes in tetra-ethyl-ortho silicate (TEOS) and heating initially in a vacuum at 100 ... created the most in- depth theory of the jet and instability regions to date Three main instabilities exist; (a) Rayleigh instability, (b) axisymmetric conducting instability, (c) whipping instability,...

Ngày tải lên: 20/03/2014, 13:06

... vacancies and interstitials in the MWCNTs The surface structure, including defects and amorphous carbons on the carbon nanowires, is removed due to the ion sweeping, which leads to an increase in diameter ... s, the amorphous carbon domains are eliminated, and the tubes become smoother and cleaner as shown in Fig.1(b) and (c) After 60 and 90 s, as seen in Fig.1(e) and (f), the carbon nanotubes become ... analysis Clearly visible in Fig 1(a) are the amorphous carbon layers deposited on the surface, connecting with each other, which probably result from incomplete carbon atomic piling When CNTs were...

Ngày tải lên: 20/03/2014, 13:06

... representative methods in Table In general, chemical oxidation is effective in eliminating amorphous carbon, adding functional structures, and cutting and/or opening CNTs; inorganic acid treatment ... 11) combining wet grinding, HIDE, oxidation and other techniques [127] TEM observations indicated that this process was effective in removing graphite and carbonaceous particles and opening CNT ... singlewalled carbon nanotubes using a fixed bed reactor packed with zirconia beads Carbon 2008;46(2):245–54 [56] Ugarte D, Chatelain A, de Heer WA Nanocapillarity and chemistry in carbon nanotubes...

Ngày tải lên: 20/03/2014, 13:06

... CNT/Multiwall carbon nanotubes; A, anatase; B, brookite; R, rutile Discussion As explained in Section 2, films obtained by dip-coating and screen-printing techniques differ in the volume of HCl used in the ... screen-printed films TiO2 (broken line), TiO2 :MWCNT (solid line) Inset: TiO2 (1), TiO2 –MWCNT (2) Behavior-type SR (%) tr (min) td (min) Screen-printed CNT as-prepared Screen-printed TiO2 Screen-printed ... screen-printing are depicted in Fig 1(a), while coatings obtained by the dipping technique are shown in Fig 1(b) It is clear the difference in thickness and reflectivity of the TiO2 films obtained...

Ngày tải lên: 20/03/2014, 13:07