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

Polymer carbon dots and graphene carbon quantum dots?

As we know that polymer carbon dots (PDs) and graphene carbon quantum dots (GCQDs) are two types of carbon dots (CDs). How to distinguish between them so that we can decide that our synthesized...

11 December 2018 8,012 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

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

Does any one know how i can prepare liver tissue with transmission electron microscope with good fixation?

i have problem in preparation of liver tissue with bad cell organelles and how i can adjust osmolarity

03 March 2021 8,890 1 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 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

Where can I find life cycle inventory or assessment of non woven materials?

Dear network, I am looking for the LCA or LCI or at least the energy balances of the non woven fabrics process for my master project, in specific for natural fibers, yet I have found...

02 March 2021 9,662 1 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

How to accurately quantify chitin?

Hi all, I have been working on the quantification of chitin in insect samples and feed for a while but I can notice that the quantification methods (e.g. exposure to HCl, NaOH, and weighing sample...

01 March 2021 1,843 2 View

Can someone suggest a way to prepare slides to observe under confocal microscope for observing fluorescent tagged proteins??

I am growing the cells on coverslips and transfecting the fluorescent tagged protein directly on them. Then i want to observe these cells under confocal microscope. Currently i am just using...

01 March 2021 6,142 3 View

Why does intensity drops as concentration increases?

Is there any reason for decrease in fluorescence emission intensity of HSA,BSA when increase the concentration ?

28 February 2021 3,653 4 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View