Does anybody know a company specialized in platinum machining?

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How do empty d-orbital cations affect the non linear optical properties of SiO2-based glasses?

It has been confirmed early in the nineties that adding oxides of empty d-orbital cations (like TiO2, Nb2O5, WO3...) improves the non-linear optical response (namely third order non linear...

03 April 2016 4,517 2 View

How to determine the crystal structure of nanoparticles (less than 5nm) embedded in a glass network?

Hello!Let's imagine a glass network (silica-based for instance) and some crystalline nanosized (< 5nm) particles are statistically distributed through this network. Indeed, by means of Raman...

02 March 2016 2,143 8 View

Are there any commercial twin-roller quenching devices for laboratory use?

As the question title suggests, could you please let me know if there is a company that fabricates laboratory-scale twin-roller quenching devices? Thank you in advance! Kind regards,

11 December 2014 9,564 1 View

Are there any journals which publish mini-reviews and/or short commentaries in glass and ceramics research area?

Hello! I am looking for a journal that allows to publish short reviews and commentaries, opinions and hypotheses discussing glass and ceramic research advances. To my knowledge, in the field of...

06 July 2014 6,912 2 View

What is the common DTA curve's shape of glasses that require very fast quenching rates?

As the question title suggests, I am wondering about the peculiarities of DTA curve of glasses (and particularly inorganic glasses) that require fast quenching rates, e.g. TeO2 glass. More...

05 June 2014 1,258 8 View

How does crystalline phase amount in a glass influence the glass' transition peak at DSC curve?

To be more clear, does the glass transition peak differ considerably between a pure glass and a glass with a negligible amount of crystallinity? Glass and crystals having the same chemical...

05 June 2014 1,616 8 View

What is the approximate cooling rate of a furnace once turned off?

As the question's title suggests, what is the approximate cooling rate of a standard laboratory furnace once shut off, i.e. allowed to cool to room temperature.

04 May 2014 5,888 18 View

How do you quantify the amount of amorphous material in a crystalline matrix?

I am trying to synthesize a crystalline inorganic compound with a very low tendency of devitrification. A posteriori, XRD patterns reveal the presence of a non-negligible amount of amorphous...

04 May 2014 2,952 15 View

How do you explain XRD pattern change upon heating?

To be more clear, what are the key elements to explain XRD pattern change when performing a High-temperature XRD? Please see the attached file (High-temperature XRD profiles of K2Te4O9 glass),...

04 May 2014 3,888 27 View

What makes the Raman spectra of bulk glass and its corresponding powder different?

To be more clear, how can you explain that the Raman spectrum of a bulk glass sample features some other variations than that of the powder of the same bulk glass?

03 April 2014 3,982 16 View

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,343 2 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

Inquiry on Maximum Nucleic Acid Volume for 2.5 mL Liposome Solution?

I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...

30 July 2024 6,420 1 View

How can I use DFT-D3 correction ( Siesta version 5.0.1)?

Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...

27 July 2024 5,748 0 View

EDC carbodiimide and NHS easter 's half life among different pH?

It has been long known that EDC carbodiimide and NHS easter's half life agains hydrolysis are highly related to pH. However, very surprisingly, not yet found a paper giving a table/chart of their...

25 July 2024 8,738 0 View

Is the zero-zero component of the metric tensor equal to 1 for accelerating reference frames?

Consider the case of negligible gravity but there is an accelerating reference frame. Its origin traces out a trajectory, or world line, seen in some inertial reference frame. The Lorentz metric...

24 July 2024 1,608 15 View

Mechanochemistry: ball to powder mass or ball to powder volume?

I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I...

23 July 2024 9,938 1 View

How to eliminate the carry-over effect in GC-MS/MS system?

Hi, I am a PhD student working at Jagiellonian University, Faculty of Chemistry. My work is related to the development of new analytical methods for the quantification of short-chain fatty acids...

22 July 2024 5,492 6 View

MDCI module in Orca software?

Dear Researchers, My question is associated with the "MDCI" method in Orca. Please let me clarify my question using a simple example: Suppose we are going to perform CBS extrapolation using "!...

21 July 2024 1,632 0 View