Your browser doesn't support javascript.
loading
Bright long-lived luminescence of silicon nanocrystals sensitized by two-photon absorbing antenna.
Ravotto, Luca; Chen, Qi; Ma, Yuguo; Vinogradov, Sergei A; Locritani, Mirko; Bergamini, Giacomo; Negri, Fabrizia; Yu, Yixuan; Korgel, Brian A; Ceroni, Paola.
Affiliation
  • Ravotto L; Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
  • Chen Q; Center for Soft Matter Science and Engineering, Key Lab of Polymer Chemistry & Physics of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871 (China).
  • Ma Y; Center for Soft Matter Science and Engineering, Key Lab of Polymer Chemistry & Physics of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871 (China).
  • Vinogradov SA; Departments of Biochemistry and Biophysics and Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
  • Locritani M; Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
  • Bergamini G; Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
  • Negri F; Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
  • Yu Y; Department of Chemical Engineering and Texas Materials Institute, University of Texas at Austin, Austin, TX 78712, USA.
  • Korgel BA; Department of Chemical Engineering and Texas Materials Institute, University of Texas at Austin, Austin, TX 78712, USA.
  • Ceroni P; Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
Chem ; 2(4): 550-560, 2017 Apr 13.
Article in En | MEDLINE | ID: mdl-28966989
ABSTRACT
Silicon nanocrystals of the average diameter of 5 nm, functionalized with 4,7-di(2-thienyl)-2,1,3-benzothiadiazole chromophores (TBT) and dodecyl chains, exhibit near-infrared emission upon one-photon (1P) excitation at 515 nm and two-photon (2P) excitation at 960 nm. By using TBT chromophores as an antenna we were able to enhance both 1P and 2P absorption cross-sections of the silicon nanocrystals to more efficiently excite their long-lived luminescence. These results chart a path to two-photon-excitable imaging probes with long-lived oxygen-independent luminescence - a rare combination of properties that should allow for a substantial increase in imaging contrast.
Fulltext
Print
XML
PubMed Links
Search on Google

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Chem Year: 2017 Type: Article Affiliation country: Italy
Fulltext
Print
XML
PubMed Links
Search on Google

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Chem Year: 2017 Type: Article Affiliation country: Italy