36 Questions 166 Answers 0 Followers
Questions related from Franklin Uriel Parás Hernández
Dear all : May anyone share with me a Graph showing the curves for Temperature vs Thermal Conductivity, and Temperature vs. Electrical Conductivity/Seebeck Coefficient (in the same Graph) for...
02 February 2020 10,176 5 View
Dear colleagues, hope you 'r having a good day : I may get somehow involved in a project about Sb2S3 for possible thermoelectric uses, behold the motivation behind my question. I already searched...
02 February 2020 1,946 3 View
Dear all: Have anyone deposited Al contacts on substrates of CdS and/or PbS, using an e-beam physical evaporation system ? The following is happening with my CdS and PbS films , I'm trying to...
01 January 2020 3,573 1 View
Hello All: Does anyone is currently working, or know works about introducing carbon nanostructures in the material structure of the conventional thermoelectrics (like: Bi2Te3, Sb2Te3, Bi,SbTe,...
01 January 2020 3,234 3 View
Dear all: I am looking for the data of the Vapor Pressure for these substances : - Bismuth - Tellurium (for both of these elements I found a few data, but for points of temperature above 650...
11 November 2019 7,742 1 View
Dear all : I need help with the following question : It is possible to grow n-type Bi2Te3 thin films, deposited on glass substrates using the e-beam technique ? If so, What would I require ? or...
11 November 2019 3,596 9 View
Dear colleagues: When you have an Aluminum plate, and then, lets say you sand its surface with a sandpaper, you remove its native Al2O3 thin layer previously formed on the surface. Instantly,...
10 October 2019 2,562 12 View
Dear researchers: As counterintuitive as it can be, the infinite sum of all the integers : 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ... to infinity can be understood as = -1/12 i.e. Sum(all...
10 October 2019 3,717 7 View
Regards all !: I think this could be an interesting thread for a discussion, or perhaps someone may have the definitive answer yet, When simulating some of the physical phenomena which can be...
08 August 2019 6,923 4 View
Dear all: I hope someone can give me some insight to this problem. Considering that I have a micro size metallic particle. Lets say a symmetric Gold cubic particle, about 6 micrometers of...
08 August 2019 8,530 7 View
Hello all, : Is someone out there who has simulated thermoelectrics modules successfully with COMSOL Multiphysics ? The system I'm talking about is a TEG (Thermoelectric Generator module) or a...
06 June 2019 5,813 7 View
Hello all: If someone have some experience on Hall Effect measurements on semiconductor thin films, with materials such as CdS, PbS, ZnO, etc.. My questions is: I'm trying to measure the...
06 June 2019 9,241 5 View
Hi all, : We are looking to grow Cadmium Sulfide with the humid technique of Chemical Bath Deposition (QBD), It has n't been difficult to achieve thicknesses of about 200 nm with good adherence...
06 June 2019 7,817 5 View
Does anyone can share some guides/manuals or any resource about the Linear Solvers in COMSOL Multiphysics. There are different solvers in COMSOL: Dependent Variables Solver, Stationary Solver ,...
05 May 2019 5,229 2 View
It is well known the impossibility of building a Perpetual Motion machine of any kind, but I want to talk about the following issue ... the idea of building a perpetual motion machine using the...
04 April 2019 7,770 6 View
Dear all : Can someone help me with this : Within the field of Thermoelectricity. What is the correct interpretation of the ZT (Figure of Merit) for a thermoelectric material ? What is the...
03 March 2019 621 1 View
Hello to all: I hope I can get help in the understanding of this for Phonons (when particularly speaking of Thermal Phonons) : What is the reason (or reasons) that the Chemical Potential of...
03 March 2019 2,528 1 View
Kinds regards all ! I need help, I got my data for the XRD Pattern of my Graphene Nanoplatelets (XGSciences supplier). My questions are the following, I really appreciate if someone out there...
02 February 2019 6,237 5 View
Please, I need help. Does anyone know what is the MFP of the electron and the MFP of the Phonon in Bi2Te3 Policrystalline in Bulk I know the MFP is function of many other parameters, but...
08 August 2018 4,397 3 View
I'm working with my I-V graphs of a CdS/PbS solar cell , and I was able to determine the values of the VOC and ISC , but how I can understand these parameters in terms of the functioning...
06 June 2018 9,235 12 View
I'm looking for the following book: THERMOELECTRICS HANDBOOK MACRO TO NANO. Does anyone have it ? I need it to review a few things for my thesis. If someone can help me , I will appreciate! Thank...
06 June 2018 2,394 2 View
I'm trying to make compacted pellets of Bi2Te3 from powders, trying to perform a sintering of the material taking it just below the melting point of the Bi2Te3. But I have metallic reactors,...
06 June 2018 828 4 View
Hi everyone, I just want to know who can comment about what is the real (or most accurate) classification of the Thermoelectric Effect in materials, because, I have read different...
06 June 2018 8,708 3 View
Does anyone is working with conventional thermoelectric materials fabricated with the mechanical method of Hot Pressing (or Hot Press), the so called conventional materials as: Bi2Te3, PbTe, SiGe,...
06 June 2018 5,779 4 View
Hello everyone: I'm trying to solve the following problem: I have a cylindrical reactor, made from a Hot Working tool steel, and I applied a graphite spray coating on the interior walls of the...
06 June 2018 4,854 6 View
I'm about to start working with these materials, so I have this question. I guess is a thing of terminology and may not be an entire consensus of the handle of these two terms regarding on the...
03 March 2018 9,397 5 View
Hello all: does anyone know a good criteria or standardized method to select the start and end points(values) of the Conduction Region in a I-V curve for a pn Juction Diode. it is required to...
02 February 2018 10,072 2 View
What is the difference between the so called Optical Bandgap and the Electrical Bandgap? Are there other kinds of Bandgaps? Is in every case the same Gap energy between the highest occupied...
02 February 2018 9,839 9 View
Dear all colleagues: I though this could be an interesting thread of discussion: In branches of sciences and engineering like Nanotechnology, Electronics and/or Nanoelectronics, LASERs, the so...
01 January 1970 1,797 9 View
Hello all,: I open this disscusion because it's not clear for me when to use each of these terms. Can anyone tell the difference (at a definition level) between a Crystal, a Grain and a Domain...
01 January 1970 912 9 View
Hello all : Always when we talk about Entropy we can open a few interesting and intriguing discussions ... We know there are several Entropies in nature i.e. not just a different ways of defining...
01 January 1970 3,586 8 View
Hello Dear colleagues: it seems to me this could be an interesting thread for discussion: I would like to center the discussion around the concept of Entropy. But I would like to address it on...
01 January 1970 2,195 54 View
Hello, all ; I hope someone will be able to help me, The difference between the Chemical Potential and the Electrochemical Potential are n't clear for me . and, another concept: In what case the...
01 January 1970 3,578 3 View
Can anyone help me to understand this: Can a particle carry an amount of heat ? Can a particle have some associated entropy to it ?
01 January 1970 10,056 18 View
Dear all: Does anyone know about this subject ? : I am reading a couple of scientific papers where it says that the Heat Equation (also sometimes called the Fourier Equation):...
01 January 1970 4,244 14 View
On the work with the growth technique of Chemical Bath Deposition: Has someone studied or identified the problem encountered when we place a (supposed stable) thin film of a semiconductor...
01 January 1970 9,710 2 View
