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Guided selective deposition of nanoparticles by tuning of the surface potential

Eklöf, Johnas, 1988 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Stolas, Alicja, 1992 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Herzberg, M. (författare)
Köpenhamns universitet,University of Copenhagen
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Pekkari, Anna, 1989 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Tebikachew, Behabitu Ergette, 1985 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Gschneidtner, Tina, 1985 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Lara Avila, Samuel, 1983 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Hassenkam, T. (författare)
Köpenhamns universitet,University of Copenhagen
Moth-Poulsen, Kasper, 1978 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
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 (creator_code:org_t)
2017-09-19
2017
Engelska.
Ingår i: Europhysics Letters. - : IOP Publishing. - 0295-5075 .- 1286-4854. ; 119:1
Relaterad länk:
https://research.cha...
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https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Guided deposition of nanoparticles onto different substrates is of great importance for a variety of applications such as biosensing, targeted cancer therapy, anti-bacterial coatings and single molecular electronics. It is therefore important to gain an understanding of what parameters are involved in the deposition of nanoparticles. In this work we have deposited 60 nm, negatively charged, citrate stabilized gold nanoparticles onto microstructures consisting of six different materials, (vanadium (V), silicon dioxide (SiO2), gold (Au), aluminum (Al), copper (Cu) and nickel (Ni)). The samples have then been investigated by scanning electron microscopy to extract the particle density. The surface potential was calculated from the measured surface charge density maps measured by atomic force microscopy while the samples were submerged in a KCl water solution. These values were compared with literature values of the isoelectric points (IEP) of different oxides formed on the metals in an ambient environment. According to measurements, Al had the highest surface potential followed by Ni and Cu. The same trend was observed for the nanoparticle densities. No particles were found on V, SiO2 and Au. The literature values of the IEP showed a different trend compared to the surface potential measurements concluding that IEP is not a reliable parameter for the prediction of NP deposition.

Ämnesord

NATURVETENSKAP  -- Kemi -- Polymerkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Physics
behavior
oxidation
interface
atomic-force microscopy
transport
temperature

Publikations- och innehållstyp

art (ämneskategori)
ref (ämneskategori)

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