Why images in scanning electron microscope(sem) got bright stripes?

why images in scanning electron microscope(sem) got bright stripes? an image is attached. it does not look like a material related contrast(polymers). it does not disappear with current, voltage...

31 December 2019 8,797 4 View

Connect a gas tank instead of compressor?

Is it safe to connect a gas tank instead of compressor to a laser system that uses gas to cool down the sample and clean the debris. The system won't start unless compressor is working. What...

07 August 2019 831 4 View

Should the magnetron sputtering system's targets be always oxidized?

I use reactive magnetron sputtering system to deposit TiO thin films. Specifically, I use 3 Ti targets, 8 mTorr of Ar with O2(20/3.5). However, if I use 3 sccm of O2, I obtain Ti and if I use 3.5...

31 December 2016 1,119 5 View

Raman database of Ti and TiH2?

Is there any database available to check the Raman spectra of Ti( Metal) and TiHx species? There are none in rruff

10 November 2016 1,620 1 View

Which theory I should use to calculate abosrbance of a semi-transparent thin film?

08 September 2016 6,052 12 View

May you suggest a VIS- light source for measuring photocatalytic activity?

The most popular VIS-light source for measuring photocatalytic activity must be XBO R 300 W/60 C OFR by Osram. However, it is not easy to buy the source and it does not seem easy to use it- it...

06 July 2016 8,861 12 View

Why Ti layer has been oxidized?

I deposit films by magnetron sputtering from Ti and TiO2 targets in Ar plasma[Pbase=10^-6 Torr]. I deposited a 70 nm-layer of Ti and then 120 nm-layer of TiO2 on top of it however, after annealing...

05 June 2016 9,378 16 View

Why our XRD spectra look different for the same sample, but on different holders?

We use Rigaku D/Max-2500V X-ray Diffractometer for obtaining XRD spectra of our samples. The sample used in this experiment was Si powder prepared by milling the silicon wafer. We have used 3...

03 April 2016 705 5 View

How do I ignite plasma using the RF-generator?

We use RF-generator PFG600-RF[Trumpf] for depositing thin films in our3-target magnetron sputtering system. It works perfectly fine for conductivetargets and it is very easy to eliminate REFP...

03 April 2016 2,798 26 View

Can anyone recommend a high temperature sealer paste?

We use a water- cooled mini-lamp annealing system Mila-3000 that can provide annealing at a temperature of 1000 C. 2 months ago we got a hole in the water cooling subsystem and after it was...

10 November 2015 3,899 0 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

How to remove the residual PDMS on the silicon mold?

Incompletely cross-linked pdms are difficult to remove.

01 March 2021 798 3 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

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

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

Can't recognize exact phase and PDF card no of Silicon carbide in XRD?

We have deposited silicon carbide on carbon substrate using one PVD technique. Due to amorphous behavior of SiC at low deposition temperature, we performed heat treatment of those films at...

22 February 2021 2,072 3 View

Amorphous silica XRD peak at around 10 degree?

21 February 2021 3,417 5 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

Could the "incoming radiation (net radiation)" values be negative?

Could the "incoming solar radiation" values be negative? What is the difference between "global solar radiation" and "incoming solar radiation"? Which one might be measured negative values?

21 February 2021 7,726 9 View

In methylene blue test Why is UV absorbance reading very low as soon adsorbent is added and then increasing before reaching equilibrium?

Hello, I'm working on removal of methylene blue. 01. in the dark test very first reading is taken 15 minutes after adding adsorbent to the dye solution and that UV absorbance reading is very...

19 February 2021 472 5 View