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Questions related from Xu Xuanwen
I would like to ask questions about how the adsorbed molecular influence frequency and intensity of surface plasmon resonance of metals such as Ag and Au. Does the adsorption of molecular...
18 November 2021 4,521 4 View
I would like to know whether there are nay relationships between the work function of metal nanoparticles and their particle size. The bigger the particles are, the lower the work functions are?...
08 September 2021 4,477 4 View
I would like to ask a question about the plot of density of state. Taking the attached figure as an example, What does the energy (X axis) and the DOS (Y axis) mean, respectively? In my...
01 May 2021 2,754 2 View
Does the zeta potential of the semiconductors in an aqueous solution influence the band bending of them? For example, n-type semiconductor in an acid solution or basic solution?
30 April 2021 6,226 1 View
when we dissolve ZnCl2 into water, a few white precipitations (probably Zn(OH)2 or Zn(OH)Cl) are always formed. However, it doesn't happen to Zn(NO3)2. I would like to ask for opinions what are...
23 November 2020 4,858 0 View
In metal oxides, for example perovskite, we generally have several kinds of lattice oxygens named after O1, O2 and O3 and so on, depending on different positions. I would like to ask whether these...
24 August 2020 1,629 0 View
May I have your opinions or suggestions on a problem below? I already know the XRD pattern of TaO2. Now I have a material which has very similar (but a slight shift to smaller 2θ, about 0.25 °...
31 May 2020 5,908 8 View
could you be kind of explaining that why NiO is intrinsic p-type semiconductor? Besides, how to do p-type doping on metal oxides? for example perovskites SrNb2O6 or SrTiO3 and so on.
19 May 2020 1,424 19 View
In XPS spectrum, X axis represent Bind Energy of the elements we test. It is derived from BE=hv-Ek (Ek is kinetic energy of excited photoelectrons, and Ek is detected by XPS machine). It means all...
19 April 2019 6,007 6 View
I loaded Ag onto TiO2 by photodeposition method. this is the XPS figure for Ag3d. as we can see, the first peak split on the top, and the second peak is relatively flat.are they overlapping peaks?...
21 February 2019 343 5 View
in photocatalytic water splitting, hydrogenation of C=C bond, Pt and Pd are more active than other metals. why is this? is it because their special electronic structure? if so, how this structure...
22 January 2019 5,815 6 View
As we know, in TEM, electrons go through the solids and form images in the screen. the part of the solid where more electrons go through will be more briight, and the part where less electrons go...
04 January 2019 3,365 3 View
are there any one studying NaTaO3? Why NaTaO3 has two absorption peaks in UV-vis. my sample was fabricated at 1150ºC for 20h. many papers revealed such a profile. is it due to different phase...
01 January 1970 6,751 1 View
