How the size distribution profile of Graphene looks like?

More Mohit Saraf's questions See All

How to calculate Areal Capacitance?

I have calculated specific capacitance of 200 F g-1. Now I wish to calculate Areal Capacitance. What is the formula? Electrodes: working Glassy carbon electrode of 3mm diameter (0.0707...

05 June 2019 2,190 5 View

How porosity and surface area affect supercapacitor performance (and other electrochemical applications) ?

Usually, high surface area and porosity are reported to be the primary reasons for good electrochemical sensing and supercapacitor performance. Please explain what exactly happens with high...

05 June 2019 5,069 6 View

What are the parasitic reactions (between electrode and electrolyte), which affect coulombic efficiency of Supercapacitors?

Please give some details. Why it happens in particular for battery like electrodes?

05 June 2019 9,606 2 View

Is it necessary that a composite of metal oxide and rGO should always exhibit better energy storage properties compared to only metal oxide and rGO?

Kindly shed some light on it. In my case, the rGO alone is providing better supercapacitor properties than composite.

03 April 2019 8,984 4 View

How to make composite using ultrasonication, when one of your constituents is Grphene? What should be the ratio of both participating materials?

Suppose, I want to make a composite of MOF and graphene. I wish to study the effect of relative content of participating constituents on the electrochemical properties. How to choose the ratio for...

05 June 2018 654 5 View

Expected Impact factor of Chemistryselect ?

New journal of Wiley-VCH

31 December 2017 8,199 51 View

How to differentiate soild-state thermolysis, calcination and annealing ?

Can solid state thermolysis and calcination be called same at any particular conditions ?

07 August 2017 3,927 1 View

How to determine linear range of a biosensor ?? Which is the easiest and best method ??

There are various methods to determine it. Can anyone show with example their suitable employed method ??

05 June 2017 4,755 1 View

Why in some cases Binder free electrode works well (stable ~95% after 1000 cycles) during continuius charging discharging of supercapacitor test ?

I am trying one coordination polymer as electrode material on glassy carbon electrode. It is showing good stability. What can be the reason?

05 June 2017 4,335 7 View

Among reduced graphene oxide (rGO) and nitrogen dooped reduced graphene oxide (NRGO), whose conductivity is more and why?

I have observed higher values of supercapacitance of NRGO than rGO, which has better dispersion than rGO. But what can be the possible reason of higher supercapacitor performance? Has it something...

02 March 2017 452 2 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

Is there any effect of different colours of light (white, red, yellow, blue etc.) on the rate of photosynthesis? If yes, why?

Light is inevitable for the process of photosynthesis reaction. Naturally sunlight plays the vital role for this process. Light may be of different colours like white, red, yellow, blue etc....

02 March 2021 7,890 2 View

Does Napabucasin soluble in dichloromethane and in ethanol?

I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...

02 March 2021 9,945 3 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

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

Why am i not getting solid after reacting APTES with salicylaldehyde?

The reaction of APTES with salicylaldehyde in ethanol leads to the formation of imine compound yellow solid which is mention in literature, but I am not getting yellow solid I don't know why? when...

28 February 2021 2,955 2 View

In an eye with Tyndall, does each dot correspond to an individual cell?

When you observe the presence of Tyndall in an inflamed eye: Does each of the small floating dots correspond to an individual cell or to an aggregate of cells? Does a conventional slit lamp have...

27 February 2021 6,326 2 View

How can I obtain time series data by country on night-time light (brightness) ?

Hi everyone, Please, how can I obtain time series data by country on night-time light (brightness) ? I've tried, but so far all I can find are maps. I am looking for numerical data, especially in...

24 February 2021 8,625 4 View

Thermal reduction of graphene oxide.?

I am trying to reduce graphene oxide by thermally but I have no proper information regarding this. Can any one help me regarding the details about temperature and time for the reduction of...

23 February 2021 4,155 4 View

Alexander Malm

The answer to your question depends on what your definition of "fine" is.

Your size distribution suggests that the sample is very poly-disperse, and in effect, all measurable sizes might exist. It is possible that several specific sizes exist within your sample but your measurement was not able to resolve it.

A possible issue to be aware of is that the results from DLS might not be entirely informative if your sample has anisotropy, which I would expect for a graphene suspension.

Could you share an example of a correlogram that you measured and it might be possible to offer more insight from that?

Ulf Nobbmann

Looking at the figure 4 of the article "Green synthesis of graphene and its cytotoxic effects in human breast cancer cells" by Gurunathan et al. International Journal of Nanomedicine 8:1015-1027 (2013) your results seem reasonable. Their peak is about 2-3 microns, yet not as polydisperse as your graph indicates.

Article Green synthesis of graphene and its cytotoxic effects in hum...