Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [nanotechnology]

For questions relating to the synthesis of supramolecular, or colloidal structures and their properties.

0
votes
0answers
20 views

nanostructured microspheres! are they in the nano or micro scale [on hold]

I can read some articles with TEM images that show particle sizes of more than 200-500 nm, while in the same papers it is mentioned these are nanostructured microspheres and it is also mentioned the ...
5
votes
0answers
53 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
124 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
0answers
12 views

Substitute for SU-8 on PMMA

I've got a running project, where I use SU-8 on acrylic glass. The use of SU-8 itself isn't a problem at all, on the contrary, it works brilliant. But then I'm using a SU-8 solvent which melts acrylic ...
0
votes
1answer
28 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 ...
0
votes
1answer
58 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 ...
0
votes
1answer
47 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
43 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 ...
0
votes
0answers
26 views

Mechanism behind colloidal suspension

There are two most common ways to stabilize colloids -- electrostatic stabilization and steric (or polymer mediated) stabilization. To my understanding, most of the electrically stabilized ...
4
votes
0answers
48 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
92 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
44 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
24 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 ...
0
votes
0answers
150 views

What is the catalytic mechanism involved in the Reduction of p-nitrophenol into p-aminophenol using sodium borohydride?

So, I am investigating the effects of green synthesised metal nanocatalysts in the yield of the reduction of 4-nitrophenol with sodium borohydride. I just wanted to know what the reaction mechanism of ...
2
votes
0answers
428 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
60 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
159 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
67 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
87 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
192 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
37 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 ...
17
votes
0answers
191 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
67 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
358 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
44 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 ...
4
votes
2answers
205 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
71 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
78 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
0answers
126 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
29 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
54 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 ...
0
votes
0answers
337 views

Is it possible to make Carbon Nanotubes at home?

If so, what is the simplest method, that would guarantee a yield? The methods I found on the internet usually require high temperatures and/or high pressures.
0
votes
0answers
20 views

How can I verify the synthesis of carbon nanotubes without a scanning-tunneling microscope or a scanning-electron microscope?

I followed the procedure given in this paper: https://arxiv.org/pdf/1007.1062.pdf
0
votes
0answers
79 views

Preparation of boric acid sol in oil

I want to prepare a sol of boric acid in vegetable oil for use as a lubricant for machining. I can purchase powdered boric acid inexpensively but it is not very fine. I can purchase nanoscopic boric ...
5
votes
2answers
3k views

Why do nanoparticles have a different color than their macro counterparts?

It astonished me when I learned that at nanoscale, gold is no longer "gold",rather it's red. Other elements' nanoparticles also have a different color than their macro counterparts. Why does this ...
1
vote
1answer
943 views

What do dashes mean in chemical formulas?

I'm working on summarizing some research for an essay; here's the main article. The basic premise is making nanoparticles from gold and iron(III) oxide that have properties of both gold and iron. ...
1
vote
0answers
15 views

How can I best achieve a stable solution of Pt-Nanowires in water

I am synthesizing platinum nanowires ($50nm×20\mu m$) in aqueous solution. Unfortunately they start to aggregate rapidly, which is not desired. How can I keep them dispersed?
2
votes
1answer
138 views

Do bond energies differ for surface and bulk atoms in nanoparticles?

In nano-particles, surface atoms have fewer neighboring atoms in compare to bulk atoms. Is there any difference between bond energy of surface atoms and bulk atoms?
2
votes
1answer
1k views

What is the significance of “magic numbers” of atoms in nanoparticles?

In gold nano particles, as the synthesis method improves to form smaller and smaller nanoparticles, they tend to congregate in magic numbers. I want to know if these magic numbers occur in other ...
3
votes
1answer
90 views

Reaction Penetrating Metal Sheet

I'm writing a novel set 28 years in the future in which the protagonist attempts to manipulate a communications satellite by directing a swarm of nanorobots (or possibly micro-robots, depending on ...
5
votes
2answers
540 views

What is a 'corona phase'?

What is a 'corona phase'? I have come across this term in several papers, including this one but all I have found concerning its definition is: [...] synthetic heteropolymers, once constrained ...
2
votes
0answers
76 views

SERS Gold nanoparticles performing poorly in organic solvents?

We have been working with some organic solvents lately and noticed a sharp decrease in surface-enhanced Raman spectroscopy (SERS) performance from our gold nanoparticles deposited in an organic ...
0
votes
0answers
29 views

superhydrofobicity and friction coefficient ?

I learned about superhydrofobic surface like instance water on glass which will not attach due to the lotus effect. Which is altering the surface energy and which will cause the surface to have a ...
2
votes
0answers
63 views

Investigating the displacement of a Se anion by a Sulphide anion

I am working with CdSe Quantum Dots suspended in hexane. I then tested the photoluminescence of my solution. Then I mixed my CdSe dots with a mixture of an organic conducting polymer which was ...
3
votes
0answers
119 views

Solubility of Silver Nanoparticles

(i) What happens when you put $\ce{Ag_{10}}$ and $\ce{Ag_5}$ clusters into an aqueous solution of pH = $13$ (ii) What happens when you put $\ce{Ag_{10}}$ and $\ce{Ag_5}$ clusters into an aqueous ...
1
vote
0answers
97 views

What are the strategies to deal with fluorescence from oil in Raman Spectroscopy?

I have a sample (for the purpose of this question let's call this Sample A) consisting of oil (edible olive oil) mixed with a contaminant (Contaminant B) from the Polycyclic Aromatic Hydrocarbons ...
3
votes
1answer
73 views

How do polymer properties change when moving from bulk to nanosized fibers?

Polymer are used in many applications, but how do the properties change when they are fabricated on the nanolevel? Im especially interested in polymeric and polymer derived nanofibers, and why they ...
2
votes
0answers
243 views

Difference between starch surfactant and CTAB, SDS, Tx-100

I am doing a research on the effect of surfactant on ZnO nanoparticles properties. There is a confusion here between starch surfactant and CTAB, Tx-100 and SDS. I need point on what is the difference ...
1
vote
0answers
42 views

Is there any porous material that can have narrow parallel and “perfectly straight” cavities/holes through it (or bored through it)?

I'm basically looking for a material that can allow photons to pass through its cavities, but only those photons that travel at an angle (almost) exactly perpendicular to the materials surface. Non-...
19
votes
3answers
2k views

Why is gold so popular in nanotechnology?

Gold is a very popular metal in nanotechnology. It is often used as a substrate in electronic applications, as a core of functionalized nanoparticles, and more. Why is gold so attractive? Why are ...