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Determination of In...
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Mukherjee, Sumanta
(author)
Determination of Internal Structures of Heterogeneous Nanocrystals Using Variable-Energy Photoemission Spectroscopy
- Article/chapterEnglish2014
Publisher, publication year, extent ...
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2014-07-02
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American Chemical Society (ACS),2014
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-230087
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-230087URI
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https://doi.org/10.1021/jp504283mDOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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This article describes the determination of the internal structure of heterogeneous nanoparticle systems including inverted core-shell (CdS core and CdSe shell) and alloyed (CdSeS) quantum dots using depth-resolved, variable-energy X-ray photoelectron spectroscopy (XPS). A unique feature of this work is the combination of photoelectron spectroscopy performed at lower X-ray energies (400-700 eV), to achieve surface sensitivity, with bulk sensitive measurements at high photon energies (>2000 eV), thereby providing detailed information about the whole nanoparticle structure with a great accuracy. The use of high photon energies furthermore allows us to investigate nanoparticles much larger than those studied thus far. This capability is a consequence of the much-increased mean free path of the photoelectron achieved at high excitation energies. Our results show that the actual structures of the synthesized nanoparticles are considerably different from the nominal, targeted structures, which can be post facto rationalized in terms of the reactivity of different constituents.
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Hazarika, Abhijit
(author)
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Santra, Pralay K.
(author)
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Abdelhady, Ahmed L.
(author)
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Malik, Mohammad Azad
(author)
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Gorgoi, Mihaela
(author)
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O'Brien, P.
(author)
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Karis, OlofUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)olofkari
(author)
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Sarma, Dipankar DasUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)dipsa307
(author)
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Uppsala universitetMolekyl- och kondenserade materiens fysik
(creator_code:org_t)
Related titles
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In:The Journal of Physical Chemistry C: American Chemical Society (ACS)118:28, s. 15534-155401932-74471932-7455
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