Questions tagged [nanotechnology]

For questions relating to the synthesis of supramolecular, or colloidal structures and their properties or manufacturing processes of characterization for nano-featured structures.

Filter by
Sorted by
Tagged with
0
votes
0answers
16 views

What is the binding speed of coated Fe3O4 nanoparticles to microparticles diffused in water?

Does someone know how to determine the binding speed of $\ce{Fe3O4}$ nanoparticles coated with the alkyl chain of hexadecyltrimethoxysilane to microparticles in water? I know that a precise answer is ...
4
votes
1answer
79 views

Fractional index in a chemical formula of metal oxide

I have just read an article in which they used $\ce{WO3}$ and $\ce{WO_{2.9}}$ as precursors, whose objective was to form $\ce{WS2}$, in an atmosphere of argon by CVD. In one boat there is the powder ...
2
votes
0answers
72 views

Estimating maximum size of magnetite particles in this Nile Red ferrofluid video?

In the Nile Red video Making ferrofluid from scratch a suspension of small magnetite ($\ce{Fe^{2+}Fe_2^{3+}O_4^{2−}}$) particles is produced from a combination of ferrous chloride and ferric chloride. ...
1
vote
1answer
42 views

Nano coatings reaction with Al bottles

I have a question regarding nano coatings based on the formula "modified $\ce{SiO2}$". I have been told that $\ce{Al}$ bottles react with substances with a $\mathrm{pH}$ value below 3 or above 9. ...
0
votes
0answers
45 views

Is there a cheap and effective way to make PdZn-Ag foam?

I am trying to design a machine that can convert carbon dioxide into methanol and/or hydrocarbons. My design requires PdZn-Ag foam (nanoparticles), which is made by depositing palladium-zinc vapor ...
1
vote
0answers
24 views

chitosan question [closed]

when chitosan is coated on the surface of iron oxide nanoparticles, are the amine groups of the chitosan pointed out?
1
vote
0answers
36 views

Synthesis of silver nanoparticles [closed]

Synthesis of silver nanoparticles by electrochemical Method The silver content in these products consists of both silver ions and silver particles. Typically 90% of silver content is in the form of ...
7
votes
1answer
119 views

Are all stable Xenes (graphene-like 2D honeycomb sheets) buckled?

background: Per this abstract Silicene, germanene and stanene are part of a monoelemental class of two-dimensional (2D) crystals termed 2D-Xenes (X = Si, Ge, Sn and so on) which, together with ...
2
votes
1answer
69 views

Why does the displacement reaction of zinc in copper(II) sulfate solution result in dark metallic copper?

It is commonly known that when zinc metal is placed in a solution of copper(II) sulfate, a displacement reaction occurs, and elemental copper is deposited onto the decomposing zinc metal. A practical ...
2
votes
0answers
16 views

Modification of Janus nanoparticles [closed]

I would like to synthesis gold/polyacrylic acid (PAA) Janus nanoparticles in solution. Any ideas how I can functionalize gold with a photosensitizer and PAA with an antibody so that there would be no ...
2
votes
0answers
29 views

What is the approximate cost per unit length to synthesize carbon nanotubes free of defects? [closed]

As implied near the end of this article, carbon nanotube fibers have been synthesized in chunks on the order of about a centimeter in length (Fei Wei at Tsinghua University in 2018). What is the cost ...
4
votes
0answers
29 views

Has there been any independent verification of the results from this Chinese nanotube study?

Watts up referred to the South China Morning Post in reporting that a Tsinghua University team led by Wei Fei claimed in 2018 to have manufactured carbon nanotube fibre has tensile strength of 80 ...
-1
votes
1answer
111 views

Generating colloids / nano-particles from palladium and platinum wire

I know I can generate colloidal silver from the following link generate colloidal silver I now have 2 palladium and 2 platinum wires and would like to make one colloidal solution of palladium and one ...
0
votes
0answers
26 views

Physical targeting for nano-based delivery for therapeutic agents, how does that relate to transfection?

So I understand that there are three targeting methods for nano-based delivery; however, when I was researching physical targeting, I found magnetofection as an example. Naturally, I went to search it ...
0
votes
1answer
33 views

Sample: How to calculate mass of nanopaticles with given density and Vol % [closed]

I'm trying to calculate the wt% and the mass of the nanoparticles in a ferrofluid solution. Attached is data from the supplier: ...
4
votes
1answer
81 views

Nanocar racing competition and the race tracks used

In the Nanocar race competition the molecules are raced on a gold surface. Is there a specific property of gold that it forms a good "racetrack"? On what criteria does it compare with other metal ...
4
votes
1answer
133 views

What is the crystal structure of bismuth oxyhydroxyphosphate (BOHP)?

The recent Chemical & Engineering News article Photocatalyst shreds drinking water contaminant PFOA report the following: Cates and his colleagues made an accidental breakthrough while testing ...
1
vote
1answer
57 views

Spraying aluminium hydroxide nanoparticles onto PLA as fire retardant?

Several scientific papers study FR-PLA (fire resistant PLA) in which Aluminium Hydroxide nanoparticles are melt blended into the PLA (example source: Advances in Flame Retardant Poly(Lactic Acid). ...
1
vote
0answers
19 views

Nanoparticle tracking analysis v.s Transmission Electron Microscope

I have various bimetallic nanoparticles which have formed alloys. I then used NTA and TEM to characterize the size of my nanoparticles. The TEM shows that the size of nanoparticles is considerably ...
4
votes
0answers
38 views

Nanoparticle Alloys (Gold-Silver) not forming

I have synthesised what I thought were gold-silver alloys at various different compositions. The UV/vis data showed that nanoparticles alloys with a majority of the composition made from gold had one ...
0
votes
1answer
73 views

Characterisation of gold-silver alloy nanoparticle

I have various compositions of gold-silver alloy nanoparticles. I would like to characterize my nanoparticles and confirm that they are alloys. Aside from the qualitative analysis of the colour and ...
2
votes
1answer
28 views

Are all lift-off resist negative photoresists?

Are all lift-off resist negative photoresists? I'm a bit confused as I can't find anything in my textbook/lecture slides about the type of resist used for lift-off.
-3
votes
1answer
41 views

What are nanoparticles made of? [closed]

No, really. I can't seem to find anything that properly explains this concept. What are nanoparticles? Are they charged metal ions held together by bridging ligands, or...?
5
votes
0answers
319 views

Why is bis(1,2,2,6,6-Pentamethyl-4-Piperidinyl) Sebacate used as a “bottom coat” for a superhydrophobic coating?

According to this MSDS sheet, a compound named bis(1,2,2,6,6-Pentamethyl-4-Piperidinyl) Sebacate is used in the "bottom coat" layer before a "top coat" of superhydrophobic NeverWet coating is applied. ...
2
votes
1answer
313 views

What is 'desorption hysteresis'?

I am currently reading a paper titled "Polystyrene Nanoplastics-Enhanced Contaminant Transport: Role of Irreversible Adsorption in Glassy Polymeric Domain" (link here). In the paper, the authors ...
0
votes
1answer
42 views

Lyophilization Advantage

I've been reading about freeze drying and how it increases the shelf life of certain foods and is overall a good preserving technique. My question is with regard to the actual process. I understand ...
2
votes
1answer
119 views

how to manufacture PTC ink

I am trying to create a PTC ink similar to Henkel ECI8120 , I researched PTC rubber and found that it was Polydimethylsiloxane (PDMS) loaded carbon nanoparticles, I was wondering if anyone here has ...
-1
votes
1answer
74 views

Help with Carbon Fibre

I'm having trouble finding articles about carbon fibre that don't contradict other articles. I just have a few questions about the atomic structure and the intermolecular and intramolecular forces. ...
1
vote
1answer
69 views

how to avoid bubble formation in hexane

I have faced this problems when I was working in lab with hexane for the first time. I was trying to guide dispersion of nano-particles in hexane solution to a fluid cell (vacuum chamber) with a ...
5
votes
0answers
56 views

Computational modeling of steric repulsion between two polymer mediated magnetic Nanoparticle?

Can you recommend any modern article or research papers on steric interactions and forces between two or multiple magnetic nanoparticles with polymer brushes in a nonpolar solvents? something with ...
0
votes
2answers
99 views

Is it possible to solve the equation for the diffusion of gas through a sphere analytically by applying e.g. “combination of variables”?

In the case of diffusion through a thin film it is possible to combine the variables in the following way: $\sigma = \frac{x}{\sqrt{4Dt}}$ where $x$=length $D$=diffusion coefficient $t$=time $\...
2
votes
1answer
66 views

Intensity of “surface plasmon resonance “ absorption peaks for a nano-rod

The SPR absorption spectrum of a nano-rod is seen to have two peaks with the longer wavelength peak corresponding to the absorption by the longitudinal plasmons and the other to the transverse ...
1
vote
1answer
29 views

detecting/tracking nano particle [closed]

I am new to nano-sized particles and conducting a very simple experiment using nano particles. In my experiment I have nanomagnetic particles inside water and they are moving due to applied magnetic ...
2
votes
0answers
709 views

How can I extract cellulose in plants using acids?

Me and my classmates are doing a research project about the extraction of nano cellulose from plants to form a biocomposite, which can be a material to form an effective biodegradable material. We've ...
-1
votes
1answer
71 views

Effect of the pH on the synthesized nanoparticles [closed]

I have synthesized gold nanoparticles in water through the seed-mediated thermal method by cationic additive $\ce{Ag+}$ as an assisted growth procedure [article]. The pH of the nanoparticles solution ...
0
votes
2answers
165 views

Do auto-catalytic aromatic compounds capable of forming self-replicating molecules exist?

I want to know are there any aromatic compounds able to catalyze their own synthesis? Do aromatic compounds with molecules capable of self-replication exist? P.S.I'm looking specifically for ...
0
votes
1answer
96 views

What is nanoporous structure? [closed]

I would be very grateful if you help me to understand what is nanoporous structure. Does this term relate only to the nanoporous materials (as I understand, materials with regular porous structure) or ...
-1
votes
1answer
120 views

How can I remove a TiO2 coating from my car windows? [closed]

I've tried all the common solvents including hydrogen peroxide, chlorine, acetone. I tried a high speed sander with a rare earth polish. I have spoken to the head of the chemistry dept. at Cornell ...
1
vote
0answers
225 views

How close are we to building an actual nanobot? [closed]

I want to know how far current nanotechnology is from creating an actual real-world nanorobot? Also, does such a thing actually exist, or is it just a nice name for an umbrella term to show off to the ...
2
votes
0answers
49 views

Calculate activation energy of intermolecular displacement on a nano particle

I'm simulating a nano particle and wish to calculate the activation energy of the reaction where an atom is displaced from one point on the lattice to a neighboring void( might be at higher energy ...
22
votes
0answers
375 views

Single-molecule magnet with electrically-controlled permeability: How does the Titan Shield from Deus Ex work?

In a recent installment of Deus Ex game series there is an augmentation called "Titan Shield" (it has nothing to do with $\ce{Ti}$ element): A neodymium skin underlay matrix built of nano-meshed ...
0
votes
1answer
97 views

Which group is more suitable for metal nanoparticles functionalization? [closed]

I have synthesized bimetallic nanoparticles (gold core with a silver shell). I have two choices for functionalizing them, through thiol group or amine group. Which of them is more attracted to this ...
1
vote
0answers
485 views

How can I calculate the concentration of nanoparticles in water solution? [closed]

I have synthesized gold-silver bimetallic nanoparticles in water media by following this article. How can I calculate the concentration of my nanoparticles solution?
1
vote
0answers
49 views

Functionalizing CTAC stabilized nanoparticles

I am working on functionalizing silver-gold bimetallic nanoparticles. My nanoparticles are stabilized by CTAC(cetyltrimethylammonium chloride).The most articles which I found, are about the ...
3
votes
2answers
210 views

Functionalization of nanoparticles

I want to functionalize silver nanoparticles with thiol group. My question is "how can I find that the thiolated compound is attached to the surface of nanoparticles or not?"
1
vote
0answers
279 views

Any way that I can extract sugar from drinks? Without boiling the drinks [duplicate]

Any method? Materials, engineering, any technology. I am a product design student, so any possible method is useful to me. I am thinking to add this kind of technology into my concept.
1
vote
1answer
96 views

Measuring the colloidal nanoparticles stability by dynamic light scattering [closed]

In this article the ligand exchange reaction is done for thiol coating of gold nanoparticles.In the first step dicholoromethane (DCM) is used as a extraction solvent to remove CTAC(Cetyl ...
1
vote
1answer
204 views

What is the role of NaCl in the functionalization of gold nanoparticles?

In the functionalization of gold nanoparticles (GNPs) through the sulfur-metal bond, this article (among others) states that $\ce{NaCl}$ is slowly added in the GNPs solution after addition of thiol ...
1
vote
0answers
35 views

Kinetics of Carbon Nanotubes Growth

I'm reading a paper where the author has come with these consecutive elementary reactions Where $C_2H_{4\ ads}$ is ethylene adsorved, $C_{ads}$ is carbon adsorved and $C_{CNT}$ is carbon that became ...
1
vote
1answer
65 views

Nanoparticles synthesis

I am following an article for synthesis of the nanoparticles. There is a gold nanoparticles synthesis rout which is called UPD. In this rout, the underpotential deposition of Ag onto the surface of ...