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10.3390/nano6110198 http://scihub22266oqcxt.onion/10.3390/nano6110198 C5245751!5245751!28335326     free     free     free Deprecated: Implicit conversion from float 225.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 225.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 225.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Nanomaterials+(Basel) 2016 ; 6 (11): ä Nephropedia Template TP {{tp|p=28335326|t=2016. Tuning the Emission Energy of Chemically Doped Graphene Quantum Dots |pdf=|usr=}}{{28335326}} gab.com Text Tuning the Emission Energy of Chemically Doped Graphene Quantum Dots JO: Nanomaterials (Basel) http://www.kidney.de/pget.php?&tw=1&pmid=28335326 #FOAvip Tuning the emission energy of graphene quantum dots (GQDs) and understanding the reason of tunability is essential for the GOD function in optoelectronic devices. Besides material-based challenges, the way to realize chemical doping and band gap tuning also pose a serious challenge. In this study, we tuned the emission energy of GQDs by substitutional doping using chlorine, nitrogen, boron, sodium, and potassium dopants in solution form. Photoluminescence data obtained from (Cl- and N-doped) GQDs and (B-, Na-, and K-doped) GQDs, respectively exhibited red- and blue-shift with respect to the photoluminescence of the undoped GQDs. X-ray photoemission spectroscopy (XPS) revealed that oxygen functional groups were attached to GQDs. We qualitatively correlate red-shift of the photoluminescence with the oxygen functional groups using literature references which demonstrates that more oxygen containing groups leads to the formation of more defect states and is the reason of observed red-shift of luminescence in GQDs. Further on, time resolved photoluminescence measurements of Cl- and N-GQDs demonstrated that Cl substitution in GQDs has effective role in radiative transition whereas in N-GQDs leads to photoluminescence (PL) quenching with non-radiative transition to ground state. Presumably oxidation or reduction processes cause a change of effective size and the bandgap. Twit Text FOAVip Tuning the Emission Energy of Chemically Doped Graphene Quantum Dots ????Nanomaterials (Basel) http://www.kidney.de/pget.php?&tw=1&pmid=28335326 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=28335326 #FOAvip English Wikipedia <ref>{{Cite pmid|28335326}}</ref> Tuning the Emission Energy of Chemically Doped Graphene Quantum Dots #MMPMID28335326 Noor-Ul-Ain; Eriksson MO; Schmidt S; Asghar M; Lin PC; Holtz PO; Syväjärvi M; Yazdi GR Nanomaterials (Basel) 2016[Nov]; 6 (11): ä PMID28335326show ga Tuning the emission energy of graphene quantum dots (GQDs) and understanding the reason of tunability is essential for the GOD function in optoelectronic devices. Besides material-based challenges, the way to realize chemical doping and band gap tuning also pose a serious challenge. In this study, we tuned the emission energy of GQDs by substitutional doping using chlorine, nitrogen, boron, sodium, and potassium dopants in solution form. Photoluminescence data obtained from (Cl- and N-doped) GQDs and (B-, Na-, and K-doped) GQDs, respectively exhibited red- and blue-shift with respect to the photoluminescence of the undoped GQDs. X-ray photoemission spectroscopy (XPS) revealed that oxygen functional groups were attached to GQDs. We qualitatively correlate red-shift of the photoluminescence with the oxygen functional groups using literature references which demonstrates that more oxygen containing groups leads to the formation of more defect states and is the reason of observed red-shift of luminescence in GQDs. Further on, time resolved photoluminescence measurements of Cl- and N-GQDs demonstrated that Cl substitution in GQDs has effective role in radiative transition whereas in N-GQDs leads to photoluminescence (PL) quenching with non-radiative transition to ground state. Presumably oxidation or reduction processes cause a change of effective size and the bandgap. äTuning the Emission Energy of Chemically Doped Graphene Quantum Dots (epmc).pdf DeepDyve Pubget Overpricing