Current studentsExisting staffContact us
 

Protein-directed synthesis of NIR-emitting, tunable HgS quantum dots and their applications in metal-ion sensing

Simple item page
dc.contributor.authorGoswami, N.
dc.contributor.authorGiri, A.
dc.contributor.authorKar, S.
dc.contributor.authorBootharaju, M.S.
dc.contributor.authorJohn, R.
dc.contributor.authorXavier, P.L.
dc.contributor.authorPradeep, T.
dc.contributor.authorPal, S.K.
dc.date.issued2012
dc.description.abstractThe development of luminescent mercury sulfide quantum dots (HgS QDs) through the bio-mineralization process has remained unexplored. Herein, a simple, two-step route for the synthesis of HgS quantum dots in bovine serum albumin (BSA) is reported. The QDs are characterized by UVvis spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, luminescence, Raman spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), circular dichroism (CD), energy dispersive X-ray analysis (EDX), and picosecond-resolved optical spectroscopy. Formation of various sizes of QDs is observed by modifying the conditions suitably. The QDs also show tunable luminescence over the 680800 nm spectral regions, with a quantum yield of 45%. The as-prepared QDs can serve as selective sensor materials for Hg(II) and Cu(II), based on selective luminescence quenching. The quenching mechanism is found to be based on Dexter energy transfer and photoinduced electron transfer for Hg(II) and Cu(II), respectively. The simple synthesis route of protein-capped HgS QDs would provide additional impetus to explore applications for these materials.
dc.identifier.citationSmall, 2012; 8(20):3175-3184
dc.identifier.doi10.1002/smll.201200760
dc.identifier.issn1613-6810
dc.identifier.issn1613-6829
dc.identifier.urihttps://hdl.handle.net/11541.2/128464
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.relation.fundingDepartment of Science and Technology, India SR/SO/BB-15/2007
dc.rightsCopyright 2012 Wiley-VCH Verlag
dc.source.urihttp://dx.doi.org/10.1002/smll.201200760
dc.subjectHgS quantum dots
dc.subjectsensors
dc.subjectmercury
dc.subjectcopper
dc.subjectphotoinduced electron transfer
dc.subjectDexter energy transfer
dc.titleProtein-directed synthesis of NIR-emitting, tunable HgS quantum dots and their applications in metal-ion sensing
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9916157303801831

Files

Collections