how can i have the optical Mode size in COMSOL?

hello, Im using the Electromagnetic Waves Beam Envelops interface in order to simulate two seperate structures: one is a waveguide inside silicon, second is just propagation inside a bulk of...

10 October 2020 6,184 2 View

What would happen if the work function (WF) of the cathode is lower than the acceptor LUMO?

Dear colleagues, Now I am working on BHJ solar cells with inverted structure. I have a case where the cathode's WF (~3.8 eV) is lower than acceptor LUMO (~3.9 eV). What would happen if the...

18 August 2020 9,367 3 View

How to implement lower partial moment of order 1 for given stocks in excel sheet?

I am working on portfolio optimization using lower partial moment of order 1, can someone help me how to implement LPM-1 in excel sheet using "tau" as my threshold value as 0.00% and order (n) as...

05 July 2020 2,510 1 View

Do female sandbar sharks school?

I am looking for literature regarding sexual segregation in sandbar sharks (carcharhinus plumbeus). I was told once that males school but females are solitary, and I cannot find a reference...

07 May 2020 2,537 2 View

How can I adjust the tilt angle and the distance between the absorbed small molecules and the substrate?

I am here using the avogadro program for the construction of molecular structures, before doing DFT calculations. I use H2O and Graphene as small molecules and their substrates.

07 May 2020 4,661 3 View

How to determine unknown class using neural network ?

I have data (series data) for two types of faults I wanted to use the neural network to practice it Then I test it using new data and the network categorizes the data and gives us whether it is...

08 April 2020 6,668 2 View

Best Macroeconomics Book?

In your opinion, what is the best Macroeconomics book you have ever read? For me, it is one written by Ben Bernanke.

08 June 2019 3,141 29 View

Which evaluation is more effective and robust for imbalanced class classification?

In imbalanced class classification task, accuracy is not good enough as a main evaluation. There are several alternative evaluation, i.e.: AUC, kappa coefficient and Matthew's correlation...

22 April 2019 794 9 View

Why the active layer film becomes bad when I spin-coat a solution on it?

Dear colleague, I try to make opv device using PTB7:PC70BM active layer. The solvent/additive of this active solution are Chlorobenzene and DIO. When I try to spin-coat a phosphomolybdic acid...

28 March 2019 7,675 7 View

How can I convert from ppm to weight or volume for stearic acid in solution?

Dear, How can I convert from ppm to %wt or %vol for stearic acid in solution? For example 200 ppm of stearic acid in 10 mL of ethanol contains 20 mg PEIE. Thanks Sincerely, Adi Prasetio

23 January 2019 8,510 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

How to prepare a thin polymer film by post-polymerization/crosslinking?

24 February 2021 2,362 5 View

Is is possible to pole with corona poling pellets of the sample material instead of thin films?

As it is highly probable that pellets will have a higher degree of air gaps and voids than thin films, is it possible to pole the samples with corona poling nevertheless? Or is there the...

24 February 2021 1,349 1 View

How to troubleshoot Electrochromic Films and Electrochromic Devices?

I am trying to characterize an electrochromic system. The system uses ITO electrodes on glass, WO3 as the electrochromic film, and NiO as the ion storage layer. When I deposit NiO and WO3 and...

23 February 2021 9,592 2 View

How to improve the adhesion between germanium and silicon monoxide thin film layers using EBEAM evaporation?

I want to deposit multilayer coating of germanium and silicon monoxide on silicon wafer using ebeam evaporation?

21 February 2021 2,141 3 View

How can I measure the thickness of thin layers deposited on textured glass susbtrates?

I want to measure the thickness of aluminum oxide and titanium oxide layers deposited on textured glass substates. The layer thicknesses are typically below 100nm.

21 February 2021 5,465 4 View

How do I calculate absorption coefficient of my thin film if I dont know the thickness? Or how can I calculate the thickness of my sample?

I have done Uv-vis characterisation of my thin film and have received absorbance and transmittance data. Now I want to calculate the absorption coefficient but I dont know the thickness of my...

21 February 2021 7,148 8 View

How to construct different filler shape in MD simulations?

Is there any way to construct different initial filler shapes like triangle, square, rectangle, pillar, and tube in any simulation software.

20 February 2021 1,750 1 View

Can fractal dimension of thin film surfaces affects the electrons energy states?

As fractal dimension of a thin film surface implies the irregularity in the surface. Is it possible that the energy states of the electrons are also affected by the fractal dimension?

19 February 2021 5,509 3 View

How can I measure the surface interaction or surface interfacial chemistry between polishing abrasives and upper surface of substrate ?

I am working on polishing abrasives. I need to do few characterizations ? which can provide the on time surface chemistry of substrate with polishing abrasive during optical polishing. I would...

18 February 2021 5,319 3 View