nanorods nanotubes and nanofibers

... quasi-one-dimensional materials such as nanotubes and nanowires demonstrate many extreme properties that can be tuned by controlling their structure and diameter Nanotubes, nanowires, and nanofibers are not only ... LLC Nanotubes and Nanofibers Zigzag Chiral Armchair FIGURE 1.1 Schematic representation of the relation between nanotubes and graphene The three rectangles can be rolled up into seamless nanotubes; ... & Francis Group, LLC Nanotubes and Nanofibers 34 54 M R Falvo, G J Clary, R M Taylor II, V Chi, F P Brooks, J R Washburn and R Superfine, Bending and buckling of carbon nanotubes under large...

Ngày tải lên: 27/06/2014, 10:20

... radiation (50 kV, 40 mA) and a scan speed of 0.5°/min in h–2h mode The divergence, anti-scatter and receiving slits were fixed at 1o The crystallite size of AlFn(OH)3Àn (n = 1.5, 1.62 and 1.65) was calculated ... bath for 30 and collecting the fragments on holey carbon copper-supported grids Nitrogen adsorption and desorption isotherms were recorded at 77 K using an Accelerated Surface Area and Porosimetry ... open circles – anatase TiO2), and (c) AAO membranes treated by liquid phase deposition for h with Ti/Al ratio of Recently, Shyue and co-workers [18] formed TiO2 nanotubes by coating the walls...

Ngày tải lên: 19/03/2014, 16:48

... downloaded at www.jcrystal.com My earliest implementation of routines for the creation and visualization of nanotubes and nanocones was realized in JSV (Java Structure Viewer), a program which I wrote ... generating a flat graphene sheet and then rolling it into a tube or a cone Two types of nanotubes can be capped with parts of the well-known Buckyball (C60) These are the {5,5} and the {9,0} tubes, which ... {7,0}, {10,0}, {13,0} and {16,0} tubes {7,0} Nanotube Bundle A bundle of seven {7,0} single-walled carbon nanotubes (SWCNT) {7,3} Nanotube Bundle A bundle of seven {7,3} nanotubes Inside {5,3}...

Ngày tải lên: 04/06/2014, 15:20

... conductivity of carbon nanotubes and graphene in epoxy nanofluids and nanocomposites Mario Martin-Gallego1, Raquel Verdejo1, Mohamed Khayet2, Jose Maria Ortiz de Zarate2, Mohamed Essalhi2, and Miguel Angel ... synthesis and characterization of nanofillers and nanocomposites, participated in the discussion, and drafted the manuscript RV helped in nanocomposite preparation, participated in the discussion, and ... vibrational modes of the graphene and of the polymeric matrix plays a dominant role on the thermal conductivities of the liquid and solid states Keywords: carbon nanotubes; graphene; nanocomposites;...

Ngày tải lên: 20/06/2014, 23:20

... self-organized, and free-standing morphologies, and the optimize geometrical architectures (average external diameter, 350 nm; tube length, 3.5 μm; wall thickness, 10 nm; and space among tubes, 60 nm), and ... rings and attached particles, these special structures and morphologies are the (a) probable cause of crystal nucleus formed And then the nucleus gradually grew up and became increasing TiO2 nanorods ... FESEM images of the top view and cross-section of the TNTAs shown in Figure 1a and the TEM, SAED, and HRTEM images in Figure 1b The second step is the synthesis of BTs and PCTs using hydrothermal...

Ngày tải lên: 21/06/2014, 06:20

... those D band, D0 band and G band peaks changed only slightly Additional Raman peaks from the ZnO shells appeared; the relatively strong peaks at 427 and 567 cm-1 correspond to Ehigh and A1 (LO) ... cm-1 corresponding to sp2-hybridized carbon and a D band at *1346 cm-1 originating from disordered carbon [17, 18] In addition to the D band, the D0 band as a shoulder of the Nanoscale Res Lett ... distortion [18] The intensity ratio of the D0 over the G band (ID0 /IG) increases with a decrease in the graphite crystalline domain The D band and D0 band peak are very strong, indicating that the CNTs...

Ngày tải lên: 21/06/2014, 08:20

... Ni nanotube and nanowire arrays obtained under different conditions: (a), (c) and (e) are top views of samples 1, and respectively; (b), (d) and (f) are side views of the samples 1, and respectively ... electrodeposition process for Ni nanotubes and nanowires Figure 4a provides a clear understanding of the growth mechanism of Ni nanotubes The junction between the electrode surface and the bottom edge of ... mA) and sample (-0.8 V, 60 min, 0.04–0.26 mA) The morphology of the Ni nanostructure arrays was investigated using a JEOL JSM-6390LV SEM The structure and microstructure of the Ni nanotubes and...

Ngày tải lên: 21/06/2014, 20:20

... NSF-EPSCoR and DoD grants We would like to thank Mr William’s assistance of Raman measurements, Mr Ortiz and Ms Hernandez for SEM and EDS measurements, Mr Esteban for XPS measurements and Mr Wu ... bands marked with K1 and K2 located in 770 cm–1 and 870 cm–1 which was shown in Fig 4a, were related to tungsten oxide Typical Raman peaks of crystalline tungsten oxide located at 700 cm–1 and ... than that of 200 and 002 orientations Similar phenomenon was observed at the 2h diffraction angles between 47o and 51o, which were associated with the orientations of 004, 040, and 400 Meanwhile,...

Ngày tải lên: 22/06/2014, 18:20

... carbon and the methane decomposition rate depend on the structure and nature of the active catalytic sites and the size of the catalyst particles [21], alloy hydride catalysts with low cost and ... around 1589 cm–1 (G-band) [20] is observed In addition, a peak centred at around 1367 cm–1 (D- Fig EDAX spectra of (a) alloy filled MWNTs, and (b) Ni nanowire encapsulated MWNTs band), mainly due ... for SWNTs show the presence of RBM, at 388.9 cm–1, in addition to the G- and Dbands The increase in the intensity of D-band for Nifilled MWNTs is due to the non-uniform filling of Ni, resulting...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 14/11/2014, 12:32

... Li Jing, and Sheng Su in CSMM and Mr Tan Choon Wan from the physics workshop I would also like to thank Prof Kang En-Tang, Dr Liu Yiliang and Dr Liu Gang from Department of Chemical and Biomolecular ... References 18 II Fabrication and characterization 2.1 Introduction 2.2 23 Preparation of aluminum oxide templates, titanium oxide nanotubes and magnetic nanowires and deposition of thin film 2.2.1 ... work: an aqueous mixture of X acetic acid and HF solution and a mixture of NH4F and water in ethylene glycol The concentration of NH4F, the applied voltage and the thickness of the sputtered titanium...

Ngày tải lên: 09/09/2015, 18:58

... armchair chirality (n = m) has no band gap between the conduction band and the valence band, so it is metallic A SWCNT with n - m = 3q (q is an integer) has a quite small band gap It thus exhibits quasi-metallic ... rad, and the gap between cone and plate was 0.5 mm During measurement, the gels were sandwiched between the cone and plate A periodic shear strain: γ = γ0sin(tω) (9) was applied to the cone, and ... spectra of pristine SWCNTs (solid curve) and a SWCNT film (dashed curve) (b) Raman intensity ratios of the D band to G band (ID/IG) of (i) asreceived SWCNTs and a SWCNT:POETE gel after successively...

Ngày tải lên: 10/09/2015, 08:35

... turn improves the assay sensitivity, and (III) a single-strand DNA (ssDNA) standard bearing the same sequence and length as of the target gene was created and accurately quantified for use in ... SA-beads and COOH-beads 81 2.2.4.4 Hybridization with TG and NTG .81 2.2.4.5 Hybridization with conventional and CNT-based labels .82 2.2.5 Colorimetric detection 82 2.3 Results and ... carbon nanotubes and biosensors I want to thank A/P Sheu Fwu-Shan (NUS) and A/P Poenar D Puiu (NTU) for their guidances Special thanks to Dr Eishi Igata (NTU) for sharing his insights and experiences...

Ngày tải lên: 12/09/2015, 09:28

... tubes with multiple shells of 1–5 layers, and a shell spacing is about 0.78 nm The tubes are hollow and Results and discussion 3.1 Nanotubes Titanium oxide nanotubes can be formed in the range of ... absorption bands centered at 3400, 1630 and 950 cm−1 can be assigned to O–H stretching mode for interlayer water, oxonium ions and hydroxyl groups, H–O–H bending for water and oxonium ions, and O–H ... these nanosheets were often bent (Figs and 4) The Na+ ions attached in nanotubes and nanosheets could be exchanged and removed after washing with water and diluted acid solution Titanium in the...

Ngày tải lên: 20/03/2014, 13:11

... Tsang and co-workers studied the interaction of protein, enzymes and DNA with carbon nanotubes They found that DNA molecules tended to cover the surface of nanotubes and the small proteins and ... fullerene and light, so the polymer was tested on mice affected by bone tumor After injection and irradiation, tumor size and weight were reduced and the mouse survival time was extended (Jiang and ... acids and their impact on health 2.2 2.2.1 Carbon Nanotubes Structure and Characteristics CNTs, discovered in 1991 by Iijima (Iijima, 1991; Iijima and Ichihashi, 1993), display unique structures and...

Ngày tải lên: 17/02/2014, 05:20

... Chapter Synthesis and Purification of MultiWalled and Single-Walled Carbon Nanotubes M.Yumura Chapter Electron Diffraction and Microscopy of Carbon Nanotubes S Amelinckx, A Lucas and P Lambin ... Structure and Raman Effect of Single-Walled Carbon Nanotubes R Saito, G Dresselhaus and M S Dresselhaus 51 Chapter Behaviour of Single-Walled Carbon Nanotubes in Magnetic Fields H Ajiki and T Ando ... of Multi-Walled and SingleWalled Carbon Nanotubes EELS Study T Hanada, Y Okada and K Yase 29 Chapter Electronic Structure of Single-Walled Carbon Nanotubes K Tanaka, M Okada and Y Huang ...

Ngày tải lên: 05/03/2014, 17:20

... resulting in a mixture of longer and thicker rods and crystals The nanorods were converted to WS2 nanotubes by heating the WO3 nanorods in Ar gas up to 840 ◦ C and then treating them in hydrogen ... was collected between 2θ = 5◦ and 60◦ (using Cu-Kα radiation), at an operation potential of 40 kV and a current of 40 mA The morphology of the WO3 nanorods and WS2 nanotubes was characterised by ... The particle size of the nanorods calculated from the XRD pattern using Scherrer’s formula varies between 50 and 185 nm Fig shows experimental and simulated HRTEM images and SAED diffraction patterns...

Ngày tải lên: 19/03/2014, 16:48

... image of the nanorods obtained with OA/W ratio of 4:1 These nanorods have an average diameter less than 100 nm and length in micrometer level A corresponding diffraction pattern of the nanorods is ... temperatures of 100 and 150 ◦ C after the Fig XRD patterns of the WO3 ·xH2 O microspheres (a) dried at 60 ◦ C and annealed at (b) 350 ◦ C; (c) 450 ◦ C; and (d) 550 ◦ C Z Liu et al / Sensors and Actuators ... are shown in Fig For the samples annealed at 350 and 450 ◦ C, the nanorods on the microsphere surface were damaged to some extent However, the nanorods inside the microspheres can still be clearly...

Ngày tải lên: 19/03/2014, 16:48

... the porous R-Fe2O3 nanorods Figure (a, b) TEM and HRTEM images of R-FeOOH nanorods (c, d) TEM and HRTEM images of porous R-Fe2O3 nanorods (e) The corresponding ED pattern and (f) HRTEM image ... The morphologies of the as-prepared R-FeOOH and R-Fe2O3 nanorods were further investigated by TEM and HRTEM Figure 3a and b shows the representative TEM and HRTEM micrographs of the as-prepared ... To investigate the formation processes of the R-FeOOH nanorods and the porous R-Fe2O3 nanorods, time-dependent experiments were carried out, and the resultant products were investigated by TEM...

Ngày tải lên: 19/03/2014, 16:48

... completely transformed to a-FeOOH nanorods, which confirmed by TEM images and XRD patterns a-FeOOH consisted of uniform nanorods with diameters around 20 nm and lengths up to 200–300 nm Meanwhile, ... pure water and in alcohol/water media is also investigated, as shown in Fig The value of saturation magnetization of samples a, b, and c is 75.4 emu/g (Fig 3a), 39.2 emu/g (Fig 3b), and (Fig 3c), ... XRD and TEM results well Based on the values of saturation magnetization of Fe3O4 (75.4 emu/g) and a-FeOOH (0), we can easily deduce that sample b is constituted with 52% of Fe3O4 in mass and...

Ngày tải lên: 19/03/2014, 16:48