synthesis, electrical measurement, and field emission properties of a-fe2o3 nanowires

... NANO EXPRESS Synthesis, Electrical Measurement, and Field Emission Properties of a-Fe2O3 Nanowires Li-Chieh Hsu Æ Yuan-Yao Li Æ Chun-Yen HsiaoReceived: ... ﬁeld of 3.3 V/lm and a large current density of 10-3A/cm2(under an applied ﬁeld of about 7 V/lm) canbe obtained using optimal factors of DNWsin the cathode.Keywords Nanowires Á Field emission ... high.Investigating the electronic properties of 1D nanoma-terials can reveal the relationship between the electronic properties of emitters and the FE properties of the device.In addition, it...

Raman spectroscopy and field electron emission properties of aligned silicon nanowire arrays

... oxide-assisted growth(OAG) [14] and other methods [15]. The SiNWs exhibit aunique sp3-bonded crystal structure and a low workfunction. Field electron emission properties of taperlikeSiNWs [14], ... were excited by means of the 514 nm line of anAr+laser, and the Raman signals were measured in abackscattering geometry with a spectral resolution of 1.0 cmÀ1. Field emission behavior was ... electron emission is one of the most important and promising applications of nanoscale tubes or wires with sharp tip arrays. For ﬁeldelectron emission devices, the desired tip diameter of theSiNWs...

electrical and gas - sensing properties of wo3 semiconductor material

... sensors of indirect heating type were fabricated. The eects of calciningtemperature and operating temperature on electrical resistance and sensitivity, and sensitivity-gas concentration properties ... of the hole concentration and decreasing of the electron concentration. WO3is akind of the acidic oxide and can react with the alkali.Besides the state of oxygen adsorbed on the surface of WO3, ... Electrical and gas-sensing properties of WO3semiconductor materialWang Yu-De*, Chen Zhan-Xian, Li Yan-Feng, Zhou Zhen-Lai, Wu Xing-HuiDepartment of Materials Science and Engineering,...

controlled synthesis and gas sensing properties of hollow sea urchin like

... surfaces.The diameter of these pits is 5–9 nm. The presence of the pits maybe due to the decomposition of ␣-FeOOH and release of H2O.Fig. 5a and b show SEM image and XRD pattern of the prod-ucts ... ethanol and (f) hydrogen of different concentrations at 350◦C and relative humidity of 5–18%.Table 1The linear equations and correlation factor for the chart of the logarithm of response of the ... logarithm of the response should be lin-ear with logarithm of gas concentration. Fig. 7b–f displays chart of the logarithm of response of the three kinds of sensors versus thelogarithm of gas...

Báo cáo Y học: Spectroscopic characterization and ligand-binding properties of chlorite dismutase from the chlorate respiring bacterial strain GR-1 ppt

... wepresent the EPR spectroscopic and redox properties of GR-1 chlorite dismutase. Furthermore, we investigated thebinding of hydroxide and imidazole to the ferric enzyme and of NO to the ferrous enzyme ... co-ordinating the hemeiron center of the enzyme. The UV/visible spectrum of theferrous enzyme and EPR spectra of the ferric hydroxide and imidazole adducts are characteristic of a heme protein withan ... characterization and ligand-binding properties of chlorite dismutase from the chlorate respiring bacterial strain GR-1Peter L. Hagedoorn, Daniel C. de Geus and Wilfred R. HagenKluyver Department of Biotechnology,...

Báo cáo khoa học: Stability and ﬁbril formation properties of human and ﬁsh transthyretin, and of the Escherichia coli transthyretin-related protein potx

... 2011Stability and fibril formation properties of human and fish transthyretin, and of the Escherichia colitransthyretin-related proteinErik Lundberg1, Anders Olofsson2, Gunilla T. Westermark3 and ... wehave investigated the fibril-forming properties of sbTTR and ecTRP in vitro, and compared the resultswith those of hTTR.Our results showed that hTTR, sbTTR and ecTRPcan form fibrillar structures, ... facilitate thehydrolysis of 5-hydroxyisourate, the end product of theuricase reaction. FEBS Lett 579, 4769–4774.E. Lundberg et al. Stability and fibril formation of TTR and TRPFEBS Journal 276...

Structures and electronic properties of si nanowires grown along the [1 1 0] direction role of surface reconstruction

... interms of the projection of energy band in bulk Si and conﬁnementeffect: the conﬁnement decreases the energy of HO states and in-creases the energy of the LU states, but the magnitude of the ... potential of an Si (H) atom, nSi(nH) is the number of Si(H) atoms, and ezis the zero-point energy of Si–H vibrations. Thevalue of lSiis equal to that in bulk Si and the zero of lHis ... effect of surface reconstruction could be crucial on the electronic proper-ties of thin NWs.In this paper, effects of surface reconstruction on structural and electronic properties of Si NWs...

Electronic structure and magneto optical properties of solids v antonov, b harmon, a yaresko

... of recent achievements in the theoretical investigations of the electronic structure, optical, MO, and XMCD properties of compounds and multilayered structures. Chapter 1 of this book is of ... including the MO properties. Chapter 3 of the book presents the MO properties of f band ferromag-netic materials. Sections 3.1 devoted to the MO properties of 4f compounds: Tm, Nd, Sm, Ce, and La monochalcogenides, ... 83 MO PROPERTIES OF d-BAND MATERIALS by the MO activity of Pd. For this study, we used the available MOKE spectra of Pd-rich Fe-Pd and Co-Pd alloys. The Fe0.06Pd0.94 spectra [370] and our...

microstructure characterization and no2 sensing properties of tungsten oxide

... Sensors and Actuators B xxx (2010) xxx–xxxTable 1Measured resistances and sensor responses in the presence of 5ppm of NO2for tungsten oxide nanowires and nanosheets as a function of temperature.Operating ... 250◦C, the NO2response of WO3nanosheetssensor is almost 10 times higher than that of W18O49 nanowires sensor.The response and recovery time of the W18O49 nanowires and WO3nanosheets ... peaks of the bundled nanowires syn-thesized at WCl6concentration of 0.01 M can be well indexed asthe monoclinic cell of W18O49with cell parameters of a =18.32 Å,b =3.79 Å, c = 14.04 Å and...

thermal treatment effects on the material and gas-sensing properties of room-temperaturetungstenoxidenanorodsensors

... and 327 cm−1had beenassigned to OW O bending modesof the bridging oxide, while the712 and 807 cm−1bands are the corresponding stretching modes[24,25]. Moreover, the band intensities of ... deconvolution of W 4f XPS peaks, i.e. thebinding energy of the W 4f7/2, FWHM and relative contribution of the two oxidation states. All the samples exhibit identical bindingenergies of around 35.7 and ... depositions of 5 nm Cr and 100 nm Au layers througha shadow metal mask. It possesses two interdigitated Au elec-trodes with a sensing area of 3 mm × 10 mm and an electrode gap of 300 ␮m. Sensing...

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