hydrothermal synthesis and characterization of self - assembled h - wo3

... intense and sharp diffraction peaks (Fig. 1a)are observed, indicative of high-degree crystallinity. On the otherhand, the as-synthesized h- WO3with the NH4+-based EDTA sam-ple showed broader ... bundles and urchin-like structure crystalline h- WO3samples were synthesized through hydrothermal reaction of Na2WO4· 2H 2O, HCl and Na+-orNH4+-based EDTA salt solutions inthe presence of ... magniﬁcation) and (c) 8 h (lower magniﬁcation), and urchin-like structuresynthesized at 180◦C (d) 4 h, and (e) 8 h, and (f) the EDX spectrum of h- WO3.mation of highly self- assembled nanostructures,...

hydrothermal synthesis and characterization of - feooh and fe2o3 uniform nanocrystallines

... peaks of ␣-FeOOH become slightly weak, along with the weakening of ␣-Fe2O3peaks, which indicates the transition from ␣-FeOOHto ␣-Fe2O3.Fig. 2 shows the X-ray diffraction pattern of the ... Journal of Alloys and Compounds 433 (2007) 216–220 Hydrothermal synthesis and characterization of ␣-FeOOH and ␣-Fe2O3uniform nanocrystallinesXiaohe Liua,b, Guanzhou Qiub, Aiguo Yanb, Zhong ... 24 h. orthorhombic phase of goethite ␣-FeOOH. When the reactiontime prolonged to 12 h, the previous nanorods appeared agglom-erate (in Fig. 4A), which is very critical for the formation of porous...

hydrothermal synthesis and characterization of some polycrystalline iron oxides

... with de®nite composition. A number of papers dealing with the hematite formation under hydrothermal conditions have been published [1±6].It is the aim of this paper to report on the synthesis of hematite ... 689±692 hydrothermal treatment was carried out at 120Cfor 3.5 h, with stirring..D. Hematite powder was obtained also by the hydrothermal processing of a water±goethite sus-pension in the weight ... air..F. Another path in the hematite synthesis was thedirect hydrothermal treatment of an homogeneousmixtures of ferric nitrate (1 M) and urea (1.5 M)solutions at 200C for 4 h. At about...

hydrothermal synthesis and characterization of tio2 nanorod arrays on glass substrates

... inherent growth habit and hydrothermal preparationconditions. The structure of rutile consists of chains of TiO6octahedra along the c-axis [23]. The TiO6octahedra in the chainconnect through ... chainconnect through one shared edge, while the TiO6octahedrabetween two chains connect through points, which implies thatthe chemical band in the chain is stronger than that between thechains. According ... Statistics show that 70% of Fig. 2. FE-SEM images of TNAs grown on the TiO2-coated substrate without heat treatment at a hydrothermal growth temperature of 160 8C and growth time of 3 h. (a) PT-substrate...

Báo cáo khoa học: Synthesis and characterization of a new and radiolabeled high-afﬁnity substrate for H+/peptide cotransporters pdf

... at temperatures of ‡ 45 °C.The precursor peptide H- Bip–l-3,4-dehydro-Pro-OH (H- Bip–DPro-OH) for3 H- labeling was synthesized asfollows. Boc–Bip-OH was converted to Boc–Bip– N-hy-droxysuccinimide ... out with 4 m HCl ⁄ dioxane to give H- Bip–DPro-OH as its hydrochloride. Precipitation fromisopropanol ⁄ ethyl ether gave the H- Bip–DPro–OHÆHCl inhigh purity (‡ 98%, checked by TLC, RP-HPLC and ... (B)Bip-Pro synthesis: mixed anhydride (MA) method. (C) Synthesis of Bip-[3 H] Pro. EDC, N-ethyl-N -( 3-dimethyl aminopropyl)-carbodiimide;HOSu, N-hydroxysuccinimide.Labeled high-afﬁnity substrate for...

synthesis and characterization of wo3 nanostructures prepared by an aged-hydrothermal method

... Kim Do. Hydrothermal synthesis and characterization of self- assembled h- WO3nanowires/nanorods using EDTA salts. J Alloys Compd2009;475:446–51.[20] Albiter MA, Huirache-Acuña R, Paraguay-Delgado ... Synthesis and characterization of WO3nanostructures preparedby an aged -hydrothermal methodR. Huirache-Acuñaa,b,⁎, F. Paraguay-Delgadoc,1,M.A.Albiterd,J.Lara-Romerod,R. Martínez-SánchezcaCFATA-UNAM, ... ConclusionsWO3nanostructures with hexagonal phase and mesopor-osity were obtained by using a two step aged -hydrothermal method. By using HRTEM we observed that the growthdirection of the tungsten oxide nanostructures...

Tài liệu Báo cáo khoa học: Specific targeting of a DNA-alkylating reagent to mitochondria Synthesis and characterization of [4-((11aS)-7-methoxy-1,2,3,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-on-8-oxy)butyl]-triphenylphosphonium iodide doc

... 14%).1HNMRd 7.6–7.9 (m(1 6H, P+–ArH and H- 11),7.46( 1H, s ,H- 6), 6.49 ( 1H, s, H- 9),4.1–4.2( 2H, m,Ar-O-CH2), 3.71 ( 3H, s, O-CH3), 3.4–4.0( 5H, m,P+–CH2, H- 11a and H- 3), 1.75–2.4 ( 8H, m,O-CH2-CH2,P+–CH2-CH2, ... targeting of a DNA-alkylating reagent to mitochondria Synthesis and characterization of [ 4-( (11aS )-7 -methoxy-1,2,3,11a-tetrahydro-5 H -pyrrolo[2, 1- c][1,4]benzodiazepin-5-on-8-oxy)butyl]-triphenylphosphonium ... 2003Materials and methods Synthesis of [ 4-( (11aS )-7 -methoxy-1,2,3,11a-tetrahydro-5 H -pyrrolo[2, 1- c][1,4]benzodiazepin-5-on-8-oxy )- butyl]triphenylphosphonium iodide (mitoDC-81) 2Sodium hydride...

Synthesis and characterization of silicon nanowires using tin catalyst for solar cells application

... [20]. The difference of the reflectancemight be the effect of synthesis conditions, such as thickness of metal film and SiH4gasflow. The reduction of reflectance is very helpful to improve the solar ... were obtained to 2.3 mA/cm2 and 520 mV, respectively.These values were higher than that of the hetero-junction SiNWs synthesized on metalfoil [4] and that of the homo-junction SiNWs solar cell ... performance.Therefore, further reduction of the reflectance will be expected from the optimization of the synthesis conditions of SiNWs.For analysis of the electrical properties, the I–V curve of the fabricated...

Synthesis and characterization of semiconducting nanowires for gas sensing

... determination of unit cell and space group.Incoherent imaging techniques such as STEM with the High-Angle-Annular-Dark-Field detector (STEM-HAADF) wereused for the investigation of the shape of the nanowires ... electrical characterization, (c) ED pattern of nanowire, (d) STEM-HAADF image of a nanowire, and (e) linescan of theHAADF signal (solid line) and numerical ﬁt of the shape of the nanowire (dashed line).As ... arrangement. High-resolutionTEM imaging is useful for investigation of the termination of the nanowire lateral sides and apex. Electron diffraction (ED) and analysis of zero-order and higher-order Laue-zones...

Báo cáo khoa học: Synthesis and characterization of Pi4, a scorpion toxin from Pandinus imperator that acts on K+ channels doc

... proceduresMaterialsN-a-Fmoc-L-amino acids, 4-hydroxymethylphenyloxy(HMP) resin, and reagents used for solid-phase chemical synthesis of Pi4 were purchased from Perkin-Elmer.Organic solvents ... Ca(NO3)2,0.41CaCl2, 2.4 NaHCO3,15N-2-hydroxy-ethylpiperazine-N¢-ethanesulphonic acid (Hepes), pH 7.4with NaOH]. The plasmids were cleaved with SmaI(Shaker B), Not1(ratKv1.1),Xba1 (rat Kv1.2) and EcoR1(rat ... acid /H 2O (v/v) at a ﬂow rate of 6mLÆmin)1(k ¼ 230 nm). The correct identity and thehigh degree of homogeneity of sPi4 were established by:(a) analytical C18reverse-phase HPLC (Chromolith...

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