Is it possible to have higher optical band gap in Photoluminescence spectroscopy then in UV- Vis spectroscopy?

Higher band gap in PL spectra then the UV visible spectroscopy calculated band gap

08 September 2014 9,980 4 View

Could someone advise if it is possible to dope ZnO with metal on Zn (74pm ionic radius) with metal like Ag, Cu, Yttrium like elements?

Which have larger ionic radius than Z? I have used citric acid and metal nitrate (1:1molar ratio) in water for synthesis and final heating at 600 C. My XRD trend shows the clear phase of y2o3 as...

11 December 2013 777 2 View

Wurtzite crystal structure?

"Wurtzite is the name given to the mineral ZnS. It has a hexagonal close packed array of S and the Zn(II) sit in tetrahedral (1/2 occupied) sites in the lattice" As the size of S2- ion is 184pm...

11 December 2013 9,223 3 View

Can anyone explain the reason of decrease in lattice constant of ZnO with yttrium doping?

I have doped ZnO with yttrium by gel combustion method using citric acid as a fuel in the XRD data I am not getting any impurity peak of Y2O3 for 1% doping of Y but still the lattice parametters...

09 October 2013 8,950 4 View

Is "Pechini method" specific to metal nitrate only?

Can this method be applied with metal salts of sulfate or chloride or acetate?

07 August 2013 7,051 3 View

Solgel spin coating for porous free ZnO thin film

I am trying to deposite sol gel ZnO thin film on conducting substrate by using chemical such as Zincactetdihydrate(0.5M), 2methoxyethanol and Monoethanol amine(1:1) with spin coating parameters...

06 July 2013 8,730 10 View

Does anyone know how and from where I can get this software?

04 May 2013 172 3 View

Can anyone please explain how we can calculate the refractive index and thin film thickness using the UV spectroscopy data that I have attached?

Refractive index and thickness of film.

03 April 2013 8,422 12 View

Is it ok to find the lattice parameters of the thin film by using Powder X software?

Lattice parameters by using Powder X software.

03 April 2013 6,422 18 View

How to make the contacts for dielectric measurements of thin film ?

If I am depositing my material on ITO glass then is it correct to make one contact on ito/ glass and second one on the film whose dielctric constant to be measured

03 April 2013 6,584 14 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 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

Is there a powerful system for the security of the systems distributed on IoT systems?

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Can chitosan alone can act as a reducing agent for Cu(0) nanoparticle sythesis?

[Synthesizing Cu nanoparticles without using chemical reductants]

01 March 2021 8,359 1 View

What are the new 2D nanomaterials were used for Silver nanoparticles stabilization?

In the stabilization of AgNPs are vital in current research interest. However, some of the 2D nano-materials like graphene oxide, MoS2, etc... previously used to stabilize it. But still they shown...

01 March 2021 2,207 3 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

I try to check the uv-vis absorption of Indium nanoparticle. Now I am measuring in solution, can I measure it in the form of a film?

01 March 2021 930 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