Why to use acid or base for the development of fluorescent carbon dots?

Salam all. according to the reported work in the literature, some authors used strong acid (like refluxing with HNo3) in conjugation with carbon-based precursor, while others used base such as...

11 December 2019 9,322 3 View

Full width at a half maximum (FWHM)?

Hi experts. can anyone give me some details about the advantages of FWHM? is the narrower better than wider? and why? How to explain that in a scientific way so that it can be clear for any reader...

07 August 2019 8,331 8 View

Anyone can help me to explain this graph?

Based on response surface methodology (RSM) of the design experts software, two-dimension graph were obtained. The influence of two independent variables (X1X2) on the response (QY) is shown in...

04 May 2019 8,695 4 View

Excitation-dependent/ independent emission of carbon dots?

04 May 2019 2,937 1 View

How to calculate the concentration of carbon dots based on the following details?

Hi all. According to the following mixture info., how to calculate the concentration of as-formed carbon dots (CDs). The initial amount of raw precursor = 0.05 gram. The mass of nitrogen element...

31 December 2018 4,365 0 View

Cross linker for coating nanomaterial on the surface of fiber optic sensor?

Hi all. what other alternative chemicals can be used as a cross linker for coating nanomaterial on the surface of fiber optic sensor based on layer-by-layer assembly. For instance,...

10 November 2018 2,670 3 View

How to confirm the existence of carboxylic (-COOH) groups ?

Based on FTIR and XPs analysis, how to confirm that the obtained carbon dots (CDs) has (-COOH). In which form these groups can present in our material where C-C, C-N, O-H, C-H, C=O, C-O and C-O-C...

07 August 2018 1,972 5 View

Free software for drawing chemical reactions?

Hi all. Can you suggest me an easy software for drawing any chemical reactions.

06 July 2018 2,363 0 View

How to calculate the concentration of the as-synthesized carbon dots?

Can any one please explain to me the easiest way to calculate the concentration of fluorescent carbon dots obtained from natural resources and added to nitrogen doping agent (N-CDs). It would be...

05 June 2018 10,055 0 View

Is the concentration of carbon dots important to calculate?

Hi all. fluorescent carbon dots (CDs) have been synthesized in solution form. the concentration is still un known as most of literature focusing on the absorbance (kept below 0.1) before...

05 June 2018 9,621 0 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

How to quantify carbon deposition on CuZnAl catalyst?

Dear All, I want to quantify carbon deposition on the surface of the CuZnAl catalyst. I have tried thermogravimetric analysis, but I've got weight gain as the active Cu- get oxidised. Does anyone...

01 March 2021 1,907 3 View

Why Trivalent chromium start precipitating above PH 5 ? Moreover discuss difference between adsorption of chromium and precipitation of chromium ?

I am a student of MS Environmental Engineering and started my research phase. I am working on metal removal ( chromium iii ) by using activated carbon prepared from the agricultural feedstock. So...

01 March 2021 5,475 2 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

Apart from Nanosilica and CNT's what are the other nanomaterials readily available to use in concrete mixture?

Nanotechnology in concrete materials

01 March 2021 3,379 3 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View