Detail publikace

Nanomachined surface for electrochemical sensor applications

Originální název

Nanomachined surface for electrochemical sensor applications

Anglický název

Nanomachined surface for electrochemical sensor applications

Jazyk

en

Originální abstrakt

A lot of groups are still interested in producing surfaces composed by nanoparticles for electrochemical sensors application. This nanoparticles increase the detection area and as consequence better sensitivity is obtained. The using of ordered nanostructures opens new opportunities in electrochemical sensors technology like smaller parameters, higher sensitivity and lower prices. Here it is described a technique to produce gold sensors elements with comb like microstructures and nanomachining surface. The nanoparticle surface is obtained by using of template base method. In our case, a hexagonally ordered porous alumina is used like mask for deposition nickel nanowires or nanotubes. The template of alumina is prepared by anodization process under specific conditions. Preparation of perfectly ordered structures depends on homogeneity of material, deposition technique and anodization conditions like temperature, voltage and type of acid. Two-step anodization process is used for fabricating ordered porous structures. This method uses self-ordered abilities of alumina during anodization process. In the first step, pores on the top of layer start to grow randomly but on bottom side of pores, they begin to be hexagonally ordered. After dissolving of first anodized layer, ordered pits are created like print of previous pores on aluminium layer. The second step continues with anodization process already on preprinted aluminum layer and pores start to grow ordered. Finally structure is regular ordered and all pores have same geometrical parameters. Next operation consists of filling the pores with metal by electro deposition method, in order to fabricated nanowires or nanotubes. Thin film gold electrodes with porous alumina template are applied like base for deposited nanoparticles. The fabrication of nanomachining surface depends on various parameters like temperature of solution, pH or current density. Last operation is dissolving the alumina template. As a result we obtained metal nanoparicles on comb electrodes which are object of additional research.

Anglický abstrakt

A lot of groups are still interested in producing surfaces composed by nanoparticles for electrochemical sensors application. This nanoparticles increase the detection area and as consequence better sensitivity is obtained. The using of ordered nanostructures opens new opportunities in electrochemical sensors technology like smaller parameters, higher sensitivity and lower prices. Here it is described a technique to produce gold sensors elements with comb like microstructures and nanomachining surface. The nanoparticle surface is obtained by using of template base method. In our case, a hexagonally ordered porous alumina is used like mask for deposition nickel nanowires or nanotubes. The template of alumina is prepared by anodization process under specific conditions. Preparation of perfectly ordered structures depends on homogeneity of material, deposition technique and anodization conditions like temperature, voltage and type of acid. Two-step anodization process is used for fabricating ordered porous structures. This method uses self-ordered abilities of alumina during anodization process. In the first step, pores on the top of layer start to grow randomly but on bottom side of pores, they begin to be hexagonally ordered. After dissolving of first anodized layer, ordered pits are created like print of previous pores on aluminium layer. The second step continues with anodization process already on preprinted aluminum layer and pores start to grow ordered. Finally structure is regular ordered and all pores have same geometrical parameters. Next operation consists of filling the pores with metal by electro deposition method, in order to fabricated nanowires or nanotubes. Thin film gold electrodes with porous alumina template are applied like base for deposited nanoparticles. The fabrication of nanomachining surface depends on various parameters like temperature of solution, pH or current density. Last operation is dissolving the alumina template. As a result we obtained metal nanoparicles on comb electrodes which are object of additional research.

BibTex


@article{BUT47862,
  author="Radim {Hrdý} and Jaromír {Hubálek}",
  title="Nanomachined surface for electrochemical sensor applications",
  annote="A lot of groups are still interested in producing surfaces composed by nanoparticles for
electrochemical sensors application. This nanoparticles increase the detection area and as
consequence better sensitivity is obtained. The using of ordered nanostructures opens new
opportunities in electrochemical sensors technology like smaller parameters, higher sensitivity
and lower prices. Here it is described a technique to produce gold sensors elements with comb
like microstructures and nanomachining surface.
The nanoparticle surface is obtained by using of template base method. In our case, a
hexagonally ordered porous alumina is used like mask for deposition nickel nanowires or
nanotubes.  The template of alumina is prepared by anodization process under specific
conditions. Preparation of perfectly ordered structures depends on homogeneity of material,
deposition technique and anodization conditions like temperature, voltage and type of acid.
Two-step anodization process is used for fabricating ordered porous structures. This method
uses self-ordered abilities of alumina during anodization process. In the first step, pores on the
top of layer start to grow randomly but on bottom side of pores, they begin to be hexagonally
ordered. After dissolving of first anodized layer, ordered pits are created like print of previous
pores on aluminium layer. The second step continues with anodization process already on preprinted
aluminum layer and pores start to grow ordered. Finally structure is regular ordered
and all pores have same geometrical parameters.
Next operation consists of filling the pores with metal by electro deposition method, in
order to fabricated nanowires or nanotubes. Thin film gold electrodes with porous alumina
template are applied like base for deposited nanoparticles. The fabrication of nanomachining
surface depends on various parameters like temperature of solution, pH or current density. Last
operation is dissolving the alumina template. As a result we obtained metal nanoparicles on
comb electrodes which are object of additional research.",
  address="Hutnická fakulta Technická univerzita v Košiciach",
  chapter="47862",
  institution="Hutnická fakulta Technická univerzita v Košiciach",
  journal="Acta Metallurgica Slovaca",
  number="6",
  volume="13",
  year="2008",
  month="january",
  pages="306--310",
  publisher="Hutnická fakulta Technická univerzita v Košiciach",
  type="journal article - other"
}