02039nas a2200265   4500008004100000022001400041245013000055210006900185260007100254300001600325490000600341520103000347653001901377653003001396653001801426653002101444653001901465653003701484100002601521700002301547700002001570700002301590700002901613856013101642       2016                        eng d  a1944-824400aEarth abundant iron-rich N-doped graphene based spacer and cavity materials for surface plasmon-coupled emission enhancements0 aEarth abundant ironrich Ndoped graphene based spacer and cavity   a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a12324-123290 v83 a<p>We demonstrate for the first time the use of Fe based nanoparticles on N-doped graphene as spacer and cavity materials and study their plasmonic effect on the spontaneous emission of a radiating dipole. Fe-C-MF was produced by pyrolizing FeOOH and melamine formaldehyde precursor on graphene, while Fe-C-PH was produced by pyrolizing the Fe-phenanthroline complex on graphene. The use of the Fe-C-MF composite consisting of Fe-rich crystalline phases supported on N-doped graphene presented a spacer material with 116-fold fluorescence enhancements. On the other hand, the Fe-C-PH/Ag based cavity resulted in an 82-fold enhancement in Surface Plasmon-Coupled Emission (SPCE), with high directionality and polarization of Rhodamine 6G (Rh6G) emission owing to Casimir and Purcell effects. The use of a mobile phone as a cost-effective fluorescence detection device in the present work opens up a flexible perspective for the study of different nanomaterials as tunable substrates in cavity mode and spacer applications.</p>10aCasimir effect10afluorescence enhancements10airon carbides10aN-doped graphene10aPurcell factor10asurface plasmon-coupled emission1 aSrinivasan, Venkatesh1 aVernekar, Dnyanesh1 aJaiswal, Garima1 aJagadeesan, Dinesh1 aRamamurthy, Sai, Sathish  uhttps://library.ncl.res.in/content/earth-abundant-iron-rich-n-doped-graphene-based-spacer-and-cavity-materials-surface-plasmon01549nas a2200181   4500008004100000022001400041245015200055210006900207260000900276300001400285490000600299520084200305100002301147700002001170700002501190700002301215856012901238       2019                        eng d  a2044-475300aEfficient bifunctional reactivity of K-doped CrO(OH) nanosheets: exploiting the combined role of Cr(iii) and surface -OH groups in tandem catalysis0 aEfficient bifunctional reactivity of Kdoped CrOOH nanosheets exp  cMAR   a1154-11640 v93 a<p>This work reports the bifunctional catalytic activity of layered K-doped alpha-CrO(OH). The combined action of the redox active Cr(III) and the surface hydroxyl groups was efficiently used to carry out 2-3 oxidation reactions in tandem followed by condensation/coupling reactions in one pot. Oxidation of benzyl alcohol followed by Knoevenagel condensation or coupling reactions forming C-C and C-N linkages in one pot is demonstrated. The catalyst has been characterized using XRD, IR, TGA, CO2-TPD, cyclic voltammetry, XPS and microscopic techniques to gain insight into the nature of active sites. The role of O- and O2- on the CrO(OH) catalyst in the bifunctional activity was studied using analytical techniques. Recyclability and leaching tests confirmed that K-alpha-CrO(OH) is a stable and environmentally safe catalyst.</p>
1 aVernekar, Dnyanesh1 aRatha, Satyajit1 aRode, Chandrashekhar1 aJagadeesan, Dinesh  uhttps://library.ncl.res.in/content/efficient-bifunctional-reactivity-k-doped-crooh-nanosheets-exploiting-combined-role-criii