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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.

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Green synthesis of different sizes of zinc oxide nanorods using leaf extracts

Zinc oxide nanorods have been green synthesised using various leaf extracts, such as Thymus kotschyanus and Agaricus bisporus. I want to synthesis Zinc oxide nanorods of different sizes using a leaf ...
Ronith's user avatar
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-1 votes
1 answer
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Would it be possible to form dense metal using a sol gel technique?

I was trying reduce some silver salt AgNO3 into elemental metal by thermal reduction I mixed it with citric acid and formed a solution and poured it into a circular cap (makeshift mould) and what I ...
assasinchop7's user avatar
11 votes
1 answer
1k views

Why do self cleaning windows use titanium dioxide (specifically in nanoparticle form)?

This was another AQA GCSE Chemistry past paper exam question my neighbour's daughter (16) has. It is not dated but our inability to find a markscheme makes us guess it is 2023 as that markscheme is ...
Judith Jones's user avatar
1 vote
0 answers
26 views

Can we replace surface stabilizers of CuS nanoparticles with a solid matrix?

Is there a method to simultaneously remove surface stabilizer molecules from $\ce{CuS}$ (copper monosulfide) nanoparticles and form inclusions of the nanoparticles into a solid crystal growing from a ...
Paul Kolk's user avatar
2 votes
1 answer
170 views

Metallic nanostructures exhibiting charge separation

Mostly ions consist of a few atoms. It is easy to see, why the solids they form must have simple stoichiometries. It is true even for polymeric ions, such as some complicated organic molecular ions as ...
Paul Kolk's user avatar
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24 views

Finding or designing a thermochromic that becomes transparent to NIR at room temperature

Are there known nanoparticles or organic materials that have the following properties: absorb near-infrared light and convert them to heat at temperatures below a certain threshold become mostly ...
Heye's user avatar
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1 vote
1 answer
30 views

Co(NO3)2 forming colloid in H2O, and Methanol

I was just trying to make a stock solution of some Co(NO3)2 . One in H2O, another in Methanol. Both don't completely dissolve. They're almost dissolved and appear near translucent but when shining a ...
Ahmer Imam's user avatar
2 votes
1 answer
45 views

Production SnO2 nanoparticles through chemical co-precipitation method: chemical equation of the reaction

In this paper, the production of $\ce{SnO2}$ nanoparticles through the chemical co-precipiation method is described using $\ce{SnCl2·2H2O}$ as a precursor. According to their experimental section, $\...
user21390097's user avatar
3 votes
0 answers
121 views

Ways and ideas to study ym rough surfaces with scanning tunneling microscopy

We want to study porous carbon (with nanoparticles, e.g., FeO, Ni, Au, La, Ir, Ag ...) via STM. But we run into the problem that the surface is very rough. As seen in Figure 1. Thus there is an ...
P M's user avatar
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1 vote
0 answers
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will adding metal nano particles to a CNT-polymer matrix increase the conductivity of the polymer?

I was wondering would just physical mixing of metal nano powders with MWCNT in a polymer matrix improve the conductivity of the said polymer? Would the metal particles interact with the CNT network. I ...
assasinchop7's user avatar
1 vote
0 answers
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Ni etching using nitric acid

I etched Ni film (200nm) coated on diamond substrate using 30% nitric acid. It worked well and I was able to remove the Ni in 1 minute. A few things I noted that I'm hoping to understand why they ...
JOHN's user avatar
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6 votes
1 answer
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How does aromaticity play out in carbon nanohoops?

Within the family of carbon phanes,one that has caught my attention is cycloparaphenylene. Considering that in practice it is just a segmented piece of a carbon nanotube, is must be aromatic in nature....
Evamentality's user avatar
2 votes
0 answers
332 views

Why does copper(II) sulfate solution turn black on addition of excess sodium borohydride?

In my laboratory experiment, I was supposed to reduce copper(II) sulfate to copper by means of $\ce{NaBH4}$, an indication of which was supposed to be a colour change from blue (copper(II) sulfate) to ...
Sashank Sriram's user avatar
1 vote
1 answer
110 views

Do ferrofluid nanoparticles come out of solution when exposed to a solenoid DC field current?

As the electrically-charged ionic tails of surfactants used to attach to the magnetic nanoparticles require the particle to be magnetized to stick to them; if a ferrofluid is passed has a solenoid DC ...
C-Consciousness's user avatar
1 vote
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48 views

Zetasizer - How can the Z-average mean be lower than all intensity measurements?

I recently used a Malvern Zetasizer on samples of Au nanoparticles in order to determine the size of the particles (we are looking for significant shifts in particle size between samples, and as such ...
o's1234's user avatar
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4 votes
0 answers
101 views

Is this the first report that acetonitrile & propionitrile crystals create highly polar nano surfaces? How does one detect or quantify such surfaces?

Phys.org's Titan-in-a-glass experiments hint at mineral makeup of Saturn moon says: Titan, Saturn's largest moon, is a natural laboratory to study the origins of life. Like Earth, Titan has a dense ...
uhoh's user avatar
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1 vote
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How to prepare an emulsion (compounds in wt%)

I am trying to replicate an experiment to generate microparticles but I found myself confused about how to prepare the ingredients as some need to be weighed and dissolved before and I think the ...
Microbiologie13's user avatar
3 votes
1 answer
111 views

Why don't carbon nanotubes behave like quantum dots?

If carbon nanotubes (CNTs) have the size required to have an bound electron energy state, why don't CNTs behave like quantum dots, such as having optical tunability, amongst other properties?
C-Consciousness's user avatar
1 vote
0 answers
28 views

Nanocomposite hydrogel for wet adehsion in biomedical applications

My name‘s Tristan and I‘m a bachelor‘s student in Germany. I‘m trying to synthesize an injectable nanocomposite hydrogel for wound closure and wound healing applications. The problem is that, next to ...
David Harvest's user avatar
4 votes
1 answer
90 views

Practical to measure topography of a large area (mm-scale) with scanning probe microscopy (SPM)?

I'm currently very new to nanotechnology. I do understand that it is possible to achieve an excellent topography image of a sample by SPM. However, is it possible to do SPM over a large area (for ...
Kanthee Kosolyuthasarn's user avatar
3 votes
0 answers
84 views

How does the surface to volume ratio of ions and their distribution in solution compare to that of suspended nanoparticles in nanofluids?

I am interested in understanding the heat transfer capabilities of fluids. Nano-fluids are suspensions of nanoparticles (1-100nm sized particles) in a base fluid, often water, oil or glycol. These ...
R2B2's user avatar
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2 votes
0 answers
31 views

How carbon nanotube sensors works?

How carbon nanotube sensors works? Is the protein (or chemical compound used as part of the sensor) placed inside the tube or where is it placed? and how is the technology used to place the protein ...
Dare to ask-I dnt mind punishm's user avatar
1 vote
0 answers
24 views

Calculating nanocluster's Lewis acidity

In general, fluoride ion affinity, ammonia binding energy, photoacoustic IR spectra of adsorbed species (pyridine, CO) are used to measure the Lewis acidity of a material. But in the computer ...
DGKang's user avatar
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5 votes
2 answers
80 views

Why are nanoliposome encapsulated antibiotics still so unavailable despite being so effective?

I wasnt sure how the phrase the headline question really nor if this is the right place to ask it, but i'm primarily interested in the chemical synthesis aspect and the experience of chemists ...
Furious Gamer's user avatar
0 votes
1 answer
107 views

Miller Indices of Goldnanoparticles from Turkevich and Frens method

I need the miller indices of gold nanoparticles that were synthesized after the route of Turkevich and Frens. I during my research I found a lot of publications, but it looks like no one measured it ...
Andrea's user avatar
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2 answers
974 views

How to get the coordinates of β12 borophene and χ3 borophene?

Can someone tell me how to draw the β12 borophen and χ3 borophene in Materials Studio or any other software? I've just started my project work, and I'm a beginner in this field. I have searched for ...
aritraroy24's user avatar
1 vote
1 answer
109 views

Exactly how the subscripted numbers are given to the different types of boron sheets (borophenes)?

I was going to start a project on Borophene, and hence I was going through a review journal, 2D Boron: Boraphene, Borophene, Boronene, where they have said many types of borophenes had been proposed. ...
aritraroy24's user avatar
0 votes
0 answers
45 views

How is ECR (Electron Counting Rule) done in a structure?

I've been told how to apply the ECR to GaAs{001}(2×4) in my lectures but it makes no sense to me and I don't seem to be able to find any other sources that explain this. (This is a further question on ...
user7077252's user avatar
5 votes
0 answers
178 views

Stress-Strain Graph Under Uniaxial and Biaxial Strain

I was going through a recently published journal paper by ACS (Applied Nano Materials) about gas separation using nanoporous Graphene. DOI No. - https://dx.doi.org/10.1021/acsanm.0c02340 Supporting ...
aritraroy24's user avatar
1 vote
0 answers
44 views

Reaction analogous to burning that causes cooling rather than releasing heat [closed]

Is it physically and chemically possible to design both a gas and a solid substance, such that there would be a technologically feasible initiation of a chain reaction analogous to the spark that ...
Ren Eh Daycart's user avatar
0 votes
0 answers
61 views

Keeping a catalyst suspension suspended

I am currently working on a heterogeneous photocatalyst project. We are having significant problems with the catalyst not staying suspended in an aqueous solution. What can I do to prevent ...
Tristan Maxson's user avatar
2 votes
0 answers
16 views

Discrepancy between preparation of yttrium aluminum garnet powder in a nonpreheated and preheated oven

I've made yttrium aluminum garnet (YAG) precursor powder and in my last batch, I placed one half of the powder to be annealed in a non-preheated oven (letting the powder heat up with the oven) and the ...
Jacqui Lee's user avatar
4 votes
1 answer
211 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 ...
Jose Marin's user avatar
2 votes
0 answers
224 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. ...
uhoh's user avatar
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2 votes
1 answer
74 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. ...
Richardt's user avatar
0 votes
0 answers
52 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 ...
WarpPrime's user avatar
  • 147
1 vote
0 answers
251 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 ...
Adnan AL-Amleh's user avatar
8 votes
1 answer
210 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 ...
uhoh's user avatar
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3 votes
1 answer
2k 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 ...
RayDansh's user avatar
  • 201
2 votes
0 answers
21 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 ...
Hanieh's user avatar
  • 21
2 votes
0 answers
48 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 ...
DJG's user avatar
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4 votes
0 answers
77 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 with tensile strength of 80 ...
DJG's user avatar
  • 169
-1 votes
2 answers
570 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 ...
Rick T's user avatar
  • 386
0 votes
1 answer
39 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: ...
user642407's user avatar
4 votes
1 answer
101 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 ...
Maan's user avatar
  • 291
4 votes
1 answer
216 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 ...
uhoh's user avatar
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1 vote
1 answer
76 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). ...
Arthur Mamou-Mani's user avatar
2 votes
1 answer
160 views

Nanoparticle tracking analysis versus transmission electron microscopy [closed]

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 ...
The Free Radical's user avatar
4 votes
0 answers
49 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 ...
The Free Radical's user avatar
0 votes
1 answer
126 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 ...
The Free Radical's user avatar