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Importance of the surface chemistry of nanoparticles on peroxidase-like activity
KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Funktionella material, FNM.
KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Funktionella material, FNM.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 491, nr 1, s. 15-18Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We report the studies on origin of peroxidase-like activity for gold nanoparticles, as well as the impact from morphology and surface charge of nanoparticles. For this purpose, we have synthesized hollow gold nanospheres (HAuNS) and gold nanorods (AuNR) with different morphology and surface chemistry to investigate their influence on the catalytic activity. We found that citrate-capped HAuNS show catalyzing efficiency in oxidation reaction of 3,3′,5,5′-tetramethylbenzidine (TMB) by hydrogen peroxide (H2O2) and it is superior to that of cetyltrimethylammonium bromide (CTAB)-capped AuNR. The kinetics of catalytic activities from HAuNS and AuNR were respectively studied under varied temperatures. The results indicated that surface chemistry rather than morphology of nanoparticles plays an important role in the catalytic reaction of substrate. Furthermore, influencing factors such as pH, amount of nanoparticle and H2O2 concentration were also investigated on HAuNS-catalyzed system. The great impact of nanoparticle surface properties on catalytic reactions makes a paradigm in constructing nanozymes as peroxidase mimic for sensing application.

sted, utgiver, år, opplag, sider
Elsevier, 2017. Vol. 491, nr 1, s. 15-18
Emneord [en]
Enzyme mimic, Gold nanorods, Hollow gold nanospheres, Peroxidase activity, Surface chemistry
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-212231DOI: 10.1016/j.bbrc.2017.07.014ISI: 000408518700003Scopus ID: 2-s2.0-85023636388OAI: oai:DiVA.org:kth-212231DiVA, id: diva2:1134639
Forskningsfinansiär
Swedish Cancer Society, CAN 2014/759
Merknad

QC 20170821

Tilgjengelig fra: 2017-08-21 Laget: 2017-08-21 Sist oppdatert: 2017-09-27bibliografisk kontrollert

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