Báo cáo hóa học: "Synthesis of carbon nanotubes with and without catalyst particles" doc

... Access Synthesis of carbon nanotubes with and without catalyst particles Mark Hermann Rümmeli 1,2* , Alicja Bachmatiuk 1 , Felix Börrnert 1 , Franziska Schäffel 3 , Imad Ibrahim 1,2 , Krzysztof Cendrowski 1,4 , ... WJ, Shaw EJ, Schlogl R, Hart AJ, Hofmann S, Wardle BL: Nanoscale Zirconia as a Nonmetallic Catalyst for Graphitization of Carbon and Growth of Single- and...

Ngày tải lên: 21/06/2014, 04:20

... reaction of Cd and S and thermal evaporation of CdS, respectively [7, 8]. The photoluminescence (PL) spectrum of 1D CdS nanostructures synthesized with solvothermal route consisted of bandgap and ... (No.50671099, 50172048, 10374090, and 10274085), Ministry of Science and Technology of China (No.2005 CB623603), and Hundred Talent Program of Chinese Academy of Sci...

Ngày tải lên: 22/06/2014, 00:20

... typical reaction, 0.4 mL of ammonia water (28 wt %), 6 lL of MPTO, and 0.1 mL of TEOS were orderly added to the reactor containing 10 mL of abso- lute ethanol and 5 mg of plasma-treated SWCNTs ... hybrids. Fig. 3 TEM images with lower (a) and higher magnification (b) and EDS spectrum [inset of (a)] of SiO 2 -coated SWCNTs bearing thiol groups (SWCNT@SiO 2 –SH); TEM imag...

Ngày tải lên: 22/06/2014, 00:20

... sp 3 -hybridized carbons of the nanotubes, whereas the G band corresponds to a splitting of the E 2 g stretchi ng mode of graphite, which reflects the structural intensity of the sp 2 -hybridized carbon ... charecteristic signals at δ =3.1 8and3 .12 ppm in 1 HNMR ,and = 69.2 and 52-53 in 13 CNMR are assigned to the -CH proton and carbon of cyclohex- ane combined with -OH...

Ngày tải lên: 21/06/2014, 05:20

... spherical, monodisperse with a uniform size of 20 nm, and of cubic phase with good crystallinity. Furthermore, these nanoparticles have good dispersibility in nonpolar organic solvents and exhibit visible ... 26.23% water plus ethanol, 20.45% OA, and 53.32% n-hexane, and the two-phase part is located in the lower OA region. Obviously, with an increase of the ratio of OA/...

Ngày tải lên: 20/06/2014, 22:20

... consist of well-dispersed particles without interfacial incompatibility and defects between the inorganic material and the polymer. Therefore, care- ful selection of a pair of polymer and inorganic ... Netherlands) with Cu Ka radiation (25 mA and 40 kV) at a scan rate of 2°/min with a step size of 0.02°. Nitrogen adsorption-desorpti on experiment was performedat77Kanda...

Ngày tải lên: 20/06/2014, 23:20

... nanofi- bers on the specimen using the same power and wave- length with frequencies of 8, 13, and 26 MHz. The irradiated sample was characterized using SEM, TEM, EDX, and XRD analysis. Results and ... Some of these nanopar- ticles aggregate and then get deposited on the surface of the specimen [8]. Vapor condensation starts with nucleation, proceeds with growth of supe...

Ngày tải lên: 21/06/2014, 03:20

... comparing the bright and dark sides of HfO 2 nanosheets. (a) Wide view image of a curled sheet with a portion broken off. Bright and dark sides are both visible. (b) Close- up of the bright side. ... microscopy and chemical analysis. KB and LS carried out the X-ray diffraction measurements and synthesis. TK wrote the manuscript, directed measurements, and performed analysi...

Ngày tải lên: 21/06/2014, 04:20

... viscosity of water and MWNT nanofluid decreases with the increasing of temperature. The measured viscos- ityoftapwateris0.8cpsat23.5°CandthatofMWNT nanofluid is 1.0 cps at 24.1°C. On the other hand, ... 6:297 http://www.nanoscalereslett.com/content/6/1/297 Page 7 of 13 NANO EXPRESS Open Access Enhancements of thermal conductivities with Cu, CuO, and carbon nanotube nanofluid...

Ngày tải lên: 21/06/2014, 04:20

... Figure 3 Raman and XPS spectra. (a) Raman spectrum of CNWs (original and reduced) showing the presence of D and G bands as well as the overtone and combination mode features taken with 532 nm laser ... carbon. The ratio of the intensity of the G band to that of the D band I(G)/I(D) is directly related to the in-plane crystal- lite size L a (nanometers) = 19.2 (I(G)/I(D)...

Ngày tải lên: 21/06/2014, 05:20