Reactions and luminescence in passivated Si nanocrystallites induced by vacuum ultraviolet and soft-x-ray photons
(2005) In Applied Physics Reviews 98(4).- Abstract
- Alkyl-modified silicon nanocrystallites are efficient fluorophores which are of interest for fundamental spectroscopic studies and as luminescent probes in biology because of their stability in aqueous media. In this work we have investigated these particles using scanning tunneling microscopy, synchrotron-radiation excited photoemission, and x-ray excited optical luminescence (XEOL). During the course of illumination with 145-eV photons we have monitored the evolution of the Si2p core level and, in samples which have suffered prolonged atmospheric exposure, observed in real time the growth of an extra Si2p component attributed to in situ photoinduced oxidation of the Si nanocrystallites. XEOL reveals that two emission bands are active... (More)
- Alkyl-modified silicon nanocrystallites are efficient fluorophores which are of interest for fundamental spectroscopic studies and as luminescent probes in biology because of their stability in aqueous media. In this work we have investigated these particles using scanning tunneling microscopy, synchrotron-radiation excited photoemission, and x-ray excited optical luminescence (XEOL). During the course of illumination with 145-eV photons we have monitored the evolution of the Si2p core level and, in samples which have suffered prolonged atmospheric exposure, observed in real time the growth of an extra Si2p component attributed to in situ photoinduced oxidation of the Si nanocrystallites. XEOL reveals that two emission bands are active upon soft-x-ray photon excitation and that photoluminescence intensity decreases with photon exposure, which is attributed to charge trapping within the film. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/226296
- author
- Chao, Y ; Krishnamurthy, S ; Montalti, M ; Lie, LH ; Houlton, A ; Horrocks, BR ; Kjeldgaard, Lisbeth LU ; Dhanak, VR ; Hunt, MRC and Siller, L
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Applied Physics Reviews
- volume
- 98
- issue
- 4
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000231551700093
- scopus:25144480353
- ISSN
- 1931-9401
- DOI
- 10.1063/1.2012511
- language
- English
- LU publication?
- yes
- id
- 3071bc30-28f4-4a6e-9794-f079299177f8 (old id 226296)
- date added to LUP
- 2016-04-01 11:39:13
- date last changed
- 2022-01-26 08:11:17
@article{3071bc30-28f4-4a6e-9794-f079299177f8, abstract = {{Alkyl-modified silicon nanocrystallites are efficient fluorophores which are of interest for fundamental spectroscopic studies and as luminescent probes in biology because of their stability in aqueous media. In this work we have investigated these particles using scanning tunneling microscopy, synchrotron-radiation excited photoemission, and x-ray excited optical luminescence (XEOL). During the course of illumination with 145-eV photons we have monitored the evolution of the Si2p core level and, in samples which have suffered prolonged atmospheric exposure, observed in real time the growth of an extra Si2p component attributed to in situ photoinduced oxidation of the Si nanocrystallites. XEOL reveals that two emission bands are active upon soft-x-ray photon excitation and that photoluminescence intensity decreases with photon exposure, which is attributed to charge trapping within the film.}}, author = {{Chao, Y and Krishnamurthy, S and Montalti, M and Lie, LH and Houlton, A and Horrocks, BR and Kjeldgaard, Lisbeth and Dhanak, VR and Hunt, MRC and Siller, L}}, issn = {{1931-9401}}, language = {{eng}}, number = {{4}}, publisher = {{American Institute of Physics (AIP)}}, series = {{Applied Physics Reviews}}, title = {{Reactions and luminescence in passivated Si nanocrystallites induced by vacuum ultraviolet and soft-x-ray photons}}, url = {{http://dx.doi.org/10.1063/1.2012511}}, doi = {{10.1063/1.2012511}}, volume = {{98}}, year = {{2005}}, }