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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F12%3A43894764%21RIV13-TA0-22310___
rdf:type
skos:Concept n8:Vysledek
dcterms:description
Electrochemical processes leading to formation of an ordered nanostructures are currently intensively studied. Such modified surfaces can be used in many practical applications - medicine, catalysis, photovoltaics, etc. The surface of titanium can be covered by an ordered layer of nanotubes when experimental conditions are carefully selected. According to the theory could be similarly modified surface of other metals. However, the literature dealing with this issue offers much less information than it is in the case of titanium and also indicates that the nanostructure formation occurs at significantly different experimental conditions. The work was focused on creating nanostructures on tantalum and niobium.Measurements were carried out with the potentiostat-galvanostat Jaissle Potentiostat IMP 88 PC-200V. Experiments were done in mixtures of hydrofluoric acid with sulphuric, phosphoric acid etc. The formed nanostructures were evaluated by the scanning electron microscope. At lower scan rates, 25 to 75 mV?s-1, and all exposure lengths the surface of tantalum was covered by nanostructure. Final state of surfaces was not arranged layer of nanotubes, but the structure with an irregular distribution of pores with sizes of tens of nanometers. The results of measurements on niobium lead to the conclusion that neither the potential value nor the length of potentiostatic delay do not allowed for the desired surface state achievement. Based on the results we can conclude that on tantalum a layer of numerous nano-pores was formed. Desired nanostructures on niobium were not achieved by any combination of experimental conditions. Electrochemical processes leading to formation of an ordered nanostructures are currently intensively studied. Such modified surfaces can be used in many practical applications - medicine, catalysis, photovoltaics, etc. The surface of titanium can be covered by an ordered layer of nanotubes when experimental conditions are carefully selected. According to the theory could be similarly modified surface of other metals. However, the literature dealing with this issue offers much less information than it is in the case of titanium and also indicates that the nanostructure formation occurs at significantly different experimental conditions. The work was focused on creating nanostructures on tantalum and niobium.Measurements were carried out with the potentiostat-galvanostat Jaissle Potentiostat IMP 88 PC-200V. Experiments were done in mixtures of hydrofluoric acid with sulphuric, phosphoric acid etc. The formed nanostructures were evaluated by the scanning electron microscope. At lower scan rates, 25 to 75 mV?s-1, and all exposure lengths the surface of tantalum was covered by nanostructure. Final state of surfaces was not arranged layer of nanotubes, but the structure with an irregular distribution of pores with sizes of tens of nanometers. The results of measurements on niobium lead to the conclusion that neither the potential value nor the length of potentiostatic delay do not allowed for the desired surface state achievement. Based on the results we can conclude that on tantalum a layer of numerous nano-pores was formed. Desired nanostructures on niobium were not achieved by any combination of experimental conditions.
dcterms:title
Preparation of nanostructured surfaces on tantalum and niobium Preparation of nanostructured surfaces on tantalum and niobium
skos:prefLabel
Preparation of nanostructured surfaces on tantalum and niobium Preparation of nanostructured surfaces on tantalum and niobium
skos:notation
RIV/60461373:22310/12:43894764!RIV13-TA0-22310___
n8:predkladatel
n9:orjk%3A22310
n4:aktivita
n16:P
n4:aktivity
P(TE01020390)
n4:dodaniDat
n22:2013
n4:domaciTvurceVysledku
n21:3948765 n21:9129634
n4:druhVysledku
n12:D
n4:duvernostUdaju
n19:S
n4:entitaPredkladatele
n10:predkladatel
n4:idSjednocenehoVysledku
161353
n4:idVysledku
RIV/60461373:22310/12:43894764
n4:jazykVysledku
n14:eng
n4:klicovaSlova
Tantalum, niobium, nanostructures, electrochemical oxidation, pores
n4:klicoveSlovo
n5:pores n5:electrochemical%20oxidation n5:Tantalum n5:niobium n5:nanostructures
n4:kontrolniKodProRIV
[00D716905BDD]
n4:mistoKonaniAkce
Brno
n4:mistoVydani
Ostrava
n4:nazevZdroje
NANOCON 2012 Conference Proceedings 4th International conference
n4:obor
n17:JK
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
2
n4:projekt
n11:TE01020390
n4:rokUplatneniVysledku
n22:2012
n4:tvurceVysledku
Fojt, Jaroslav Moravec, Hynek
n4:typAkce
n18:WRD
n4:zahajeniAkce
2012-10-23+02:00
s:numberOfPages
5
n7:hasPublisher
TANGER
n20:isbn
978-80-87294-32-1
n15:organizacniJednotka
22310