catalytically grown carbon nanotubes and their current applications

... 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 film were varied to study their ... 25 nm and (b) 80 nm 74 The sensing current was applied along the induced hard-axis direction LMR and TMR were measured with the fields, respectively, longitudinal and transverse to the current ... and titanium oxide nanotube and their applications which are studied in my thesis being briefly outlined in this section, we will include a brief review of the three magnetic nanostructures and...

Ngày tải lên: 09/09/2015, 18:58

... of carbon nanotubes 1.4 Applications of carbon nanotubes 10 1.5 Structure and morphology of graphene 12 1.6 Properties of graphene 14 1.6.1 Electronic and ... (Fig 1.1) They can be classified into single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs) and multi-walled carbon nanotubes (MWCNT) according to the number of graphene ... [25] 1.4 Applications of carbon nanotubes CNTs have a lot of attractive applications based on their unique structures and properties For example, the 1D structure of CNTs gives rise to applications...

Ngày tải lên: 10/09/2015, 08:35

... Waves and currents were measured using three different hydrographic instruments: an Acoustic Doppler Current Profiler (ADCP), and two electromagnetic wave and current me‐ ters (Midas Valeport©, and ... records of significant wave height (Hs), wave period and direction, longshore current veloci‐ ty (Vl), and mean current velocity (Vm) and direction Current velocity was measured at dif‐ ferent elevations ... nutrients and pollutants from land sources An understanding of sediment transport leads to a better comprehension of pollu‐ tion control, and thus helps to preserve the marine ecosystem and further...

Ngày tải lên: 16/03/2014, 12:20

... single wall carbon nanotubes Carbon 2002, 40:2043-2061 24 Deng F, Zheng QS, Wang LF: Effects of anisotropy, aspect ratio, and nonstraightness of carbon nanotubes on thermal conductivity of carbon ... addition to these outstanding properties, the recent developments on graphene synthesis routes and on -2- the understanding of their unique properties have prompted the development and study of graphene ... acid-treated carbon nanotubes (fMWNTs), even though the functionalization decreases the SSA of the nanotubes This result can be explained by the presence of the functional groups, hydroxyl and carbonyl,...

Ngày tải lên: 20/06/2014, 23:20

... approximately 1,370 and 1,580 cm -1 are related to carbon, which are designated in terms of D and G bands These peaks are in good correspondence with the Raman spectra of the amorphous carbon reported ... behaviours of the C-ZW and pure ZW nanorod electrodes cycled at different current rates The cells were first cycled at a current rate of 0.1 C, and after every 10 cycles, the current rate was increased ... demonstrated the synthesis of carbon- coated ZnWO nanorods with a one-dimensional core/shell structure using a simple hydrothermal route and subsequent carbon coating, and their enhanced Li-storage...

Ngày tải lên: 20/06/2014, 23:20

... *1580 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 ... 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) ... 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

... natural gas [19] The hydrogen produced is free of carbon monoxide and the other products being tubular carbon Results obtained on the generation of carbon monoxide-free hydrogen during the CVD growth ... observed The carbon yield during the deposition has been calculated as described previously [17] and a dependence of the yield of carbon with the growth temperature has been plotted and shown in ... (a) Low and, (b) high magnification TEM images of Zr-based AB2 alloy filled MWNTs grown at a temperature of 850°C, (c) HRTEM image of Ni-filled MWNT grown at 875°C, (d) TEM image of MWNTs grown at...

Ngày tải lên: 22/06/2014, 22:20

... activities on different frequency bands and it can be useful analyze each frequency band separately 4 Wavelet Transforms and Their Recent Applications in Biology and Geoscience Fourier transform ... contains the advantages and disadvantages comparing with each other: Table 15 Advantages and disadvantages 36 Wavelet Transforms and Their Recent Applications in Biology and Geoscience The ideal ... steps: Fig 10 Initial study 11 12 Wavelet Transforms and Their Recent Applications in Biology and Geoscience On the one side, separate the targets and non target data corresponding to Albany BCI competition...

Ngày tải lên: 28/06/2014, 17:20

... science and technology The applications span from homeland and work-place security, antiterrorism and defence scenarios, to automotive and biomedical employments For instance, homeland security and ... Functionalized/Grafted Carbon Nanotubes and Their Characterization Sensors and Actuators B, 122, 672-682 Jacobs, C B.; Peairs, M J & Venton, B J (2010) Review: Carbon Nanotubes Based Electrochemical ... exists and therefore a higher voltage is needed to make electric current flow Whether a carbon nanotube is a metal or semiconductor depends upon their diameter and chirality Semiconducting carbon nanotubes...

Ngày tải lên: 29/06/2014, 13:20

... Characterization and Application of Carbon Nanotubes Chapter Nitrogen-Containing Carbon Nanotubes A Theoretical Approach M Leonor Contreras and Roberto Rozas Chapter Dioxygen Adsorption and Dissociation ... Jeong and Geon-Woong Lee Chapter 13 Fabrication and Applications of Carbon Nanotube-Based Hybrid Nanomaterials by Means of Non-Covalently Functionalized Carbon Nanotubes 211 Haiqing Li and Il ... mice and amoeba cell viability caused by nitrogen-doped or undoped carbon nanotubes indicates that nitrogen-doped carbon nanotubes are less harmful and more biocompatible than the undoped nanotubes...

Ngày tải lên: 29/06/2014, 13:20

Ngày tải lên: 14/11/2014, 12:32

... structurally and functionally with potential applications in the field of water purification and desalination, (b) that serve as amine and ammonium receptors that may find important uses in environment and ... hydrophobic channel of the carbon nanotube and the water molecules can be conducted very efficiently through these nanotube.78-79 When the carbon nanotubes had pore sizes between 1.3 nm and nm, it had been ... functionally to a certain extend and evaluate its potential application in the field of water purification and desalination and (b) Mimics ammonia and ammonium receptor functionally and evaluate its application...

Ngày tải lên: 09/09/2015, 18:48

... STUDIES OF QUANTUM SPIN CHAIN DYNAMICS AND THEIR POTENTIAL APPLICATIONS IN QUANTUM INFORMATION VINITHA BALACHANDRAN (M Sc., Cochin University of Science And Technology, India) A THESIS SUBMITTED ... fellowship I am also grateful to my father Balachandran, mother Vimala, and siblings Vipin and Smitha for their prayers, inspiration and support I express special thanks to my mother, to whom I dedicate ... and integrable spin chains 4.8 93 97 Standard deviation σ[S] in the entropy S(t) vs the strength of the transverse field hx for integrable and non-integrable models in Fig 4.7 98 4.9 Standard...

Ngày tải lên: 09/09/2015, 18:51

... grapheme-based composites and their potential applications 37 Image reproduced from reference 37 1.4.1 Graphene- polymer composites Carbon- based materials, such as amorphous carbon and carbon nanotubes (CNTs), ... of fabrication and assembly of the free-standing GO-LbL film (b) Plot showing the variation of elastic modulus calculated theoretically (under parallel and random orientation) and that obtained ... carbon nanostructures, fuctionalized graphene, conductive polymers)67 12 1.6 Literature review on MOFs at carbon interfaces Carbon- based materials such as activated carbon, fullerene (C60), carbon...

Ngày tải lên: 10/09/2015, 09:06

... 10, 73 (25) Ramachandran, V S.; Beaudoin, J J Handbook of analytical techniques in 115 2003 concrete science and technology: principles, techniques and applications; William Andrew, 2008 (26) ... considering the voltage and mass transport effects As the voltage is initially swept from V1 the equilibrium at the surface begins to alter and the current begins to flow: The current rises as the ... which focus and direct the beam down towards the sample As it hits the sample, photons and electrons are ejected from the sample Detectors collect the secondary or backscattered electrons, and convert...

Ngày tải lên: 10/09/2015, 09:06

... processes are thermionic emission and tunneling Under illumination, excitation over the barrier and band-to-band excitation may occur and contribute to the photocurrent The ability to modify the ... (Figure 3.6(a), and three of these (1609, 1427 and 1135 cm-1) are associated with the in-plane and out-of-phase stretching modes of the C-H groups in benzene ring.22 The Raman band at 861 cm-1 ... as shown in Figure 3.10(b) and the insets The threshold for current rise now starts at a lower voltage of < 1.8 V, its magnitude has increased by two orders and the current appears to be linear...

Ngày tải lên: 10/09/2015, 09:06

... bands from four to two in the UV-vis spectra and a red shift in the Soret band of (Fe-P)n MOF 28 The presence of graphene in (G-dye 10 wt % -FeP)n MOF (red line) creates a new band at 303 nm and ... followed by washing with ethanol and drying in air UV-Vis spectroscopy of the reused catalyst in phosphate buffer shows similar soret band (391 nm) and Q bands (564 nm and 611 nm) attesting the robustness ... including an intense Soret band (409 nm) [deeper  levels LUMO] and four characteristic visible absorption bands (Q-bands) at 525, 564, 596 and 651 nm [  * 82 electronic transition from the HOMO...

Ngày tải lên: 10/09/2015, 09:06

... ligand in the G-dye and the catalytically active iron–porphyrin in the structure of the hybrid MOF To obtain insight into the electron transfer kinetics of (Fe-P)n MOF , (G-dye 50 wt % FeP)n and ... (G-dye 50 wt % -FeP)n MOF and GO 120 in which J is the measured current density, JK and JL are the kinetic and diffusion-limiting current densities, ω is the angular velocity of the disk (ω =2N, ... attenuation after a 39% loss in its initial current density In contrast, the Pt nanoparticles and Ni foam cathode show a current loss of approximately 58% and 52%, respectively This result suggests...

Ngày tải lên: 10/09/2015, 09:06

... disk current, IR is ring current and N is current collection efficiency Figure 6.23(b) shows the H2O2 yield on the catalysts The measured H2O2 yields are below 50 % and 20 % for Cu-MOF and (GO ... polarity due to oxygen ligand in the GO and the catalytically active copper in the hybrid MOF Physically mixing the Cu MOF and GO gave relatively poorer response in ORR and OER (Figure 6.25) compared ... diamond down to alumina slurry to obtain a mirror-like surface and then washed with DI water and acetone and allowed to dry mg of catalyst and 80 μl of wt% Nafion solution were dispersed in ml of 4:1...

Ngày tải lên: 10/09/2015, 09:06

... on 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 ... multidisciplinary; many have contributed their insights, their expertise and their precious time to help me Thanks to A/P Allen Yeoh (Dept of Paed., NUH & NUS) and Ms Chen Siew Peng for providing ... 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...

Ngày tải lên: 12/09/2015, 09:28