What is the effect of the electrode area and shape on the current of semiconductor-metal contact?

If I have deposited semiconductor thin film followed by metal deposition for electrical measurements, and since both of the shape and area of the contact electrode a can be varied,s illustrated in...

08 September 2018 766 4 View

Why do nanoparticles reveal broad optical absorption spectrum?

Optical absorption of nanoparticles is characterized by broad absorption spectrum with no clear edge for the main absorption band (I. e. Band gap). What are the main reasons?

01 February 2018 4,566 7 View

What are strategies of choosing baseline mode during the analysis of some spectroscopic spectra?

Through the analysis of some spectroscopic spectra (e.g. XRD, PL, FTIR and Raman) various baseline mode can be applied for obtaining a well defined Gaussian or lorentzian peaks, hence baseline...

31 December 2017 6,609 2 View

Why do structural transformation from cubic to hexagonal ZnS in bulk, increase the optical band gap?

in the case of ZnS nanoparticles, the transformation from cubic to hexagonal associated with the increase in the particle size and decrease in the value of optical band gap, which is contrary to...

06 July 2016 10,002 1 View

What is the effect of Excitation wavelength on the emission intensity?

06 July 2016 5,968 1 View

If I have ternary alloy of ZnxCd1-xS quantum dot, which trap state produced by zinc or cadmium is closer to the conduction band?

in attempt for investigation the distribution of trap states in ternary alloy of ZnxCd1-xS quantum dots, which produced by Zn, Cd and S interstitial and vacancies, some confusion in understanding...

09 October 2015 2,536 2 View

How glass convex lens magnify laser light ?

in some physical experiment glass convex lens were placed in the path of laser light for magnification geometrically not Intensity. I wander how this and the laser incident parallel to the...

02 March 2015 9,045 0 View

How can I measure I -V characteristics for powder?

10 November 2014 5,552 9 View

How is CdSO3 formed from annealing of CdS nanoparticles ?

I have a strange result, in which CdSO3 is formed with annealing of CdS nanoparticles at 600oC. I assumed that I would be getting CdO, so it's a strange result for me and no literature confirms...

08 September 2014 2,294 3 View

Can you help with the effect of polyethylene glycol on metal oxide nanoparticles?

Polyethylene glycol used as a surfactant to prepare metal oxide nano particles.

06 July 2014 8,044 1 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View