000070884 001__ 70884
000070884 005__ 20190709135529.0
000070884 0247_ $$2doi$$a10.1016/j.carbon.2017.03.017
000070884 0248_ $$2sideral$$a98565
000070884 037__ $$aART-2017-98565
000070884 041__ $$aeng
000070884 100__ $$0(orcid)0000-0001-5835-1223$$aOrtega-Liebana, M.$$uUniversidad de Zaragoza
000070884 245__ $$aUniform luminescent carbon nanodots prepared by rapid pyrolysis of organic precursors confined within nanoporous templating structures
000070884 260__ $$c2017
000070884 5060_ $$aAccess copy available to the general public$$fUnrestricted
000070884 5203_ $$aAlthough several methods on the preparation of carbon nanodots (CNDs) emitting throughout the visible have been recently reported, in most of the processes the product suffers from inhomogeneity in size and shape limiting their impact. Here, we report the synthesis of undoped and nitrogen-doped luminescent carbon nanodots by rapid pyrolysis using ordered mesoporous silica nanorods as confining templates. A rapid thermal decomposition (pyrolysis) within the confined dimensions of their pores leads to a highly uniform size distribution of CNDs with average sizes below 4 nm. These CNDs are synthesized in an extremely short time period (5 min of reaction) by immersion in a fluidized-bed reactor that provides heating homogeneity and ensures fast heat transfer. In addition, a rapid release of the homogeneous CNDs can be easily achieved by a simple ultrasonication-filtration step that prevents further chemical action on the mesoporous templates. The emission of both undoped and N-doped CNDs in colloidal and solid state (with an efficiency of 1–5%) originates from a combination of quantum confinement effects and the presence of oxidized surface states; N-doping introduces resonant absorption states which participate in emission. Furthermore, we present a simple model to describe the excitation-dependent/-independent mechanism of carbon nanodots.
000070884 536__ $$9info:eu-repo/grantAgreement/EC/FP7/294094/EU/Synthesis and characterization of NANOstructured materials with LumInescent properties for diaGnostic and tHerapeuTic applications/NANOLIGHT$$9info:eu-repo/grantAgreement/EUR/ERC/HECTOR-267626
000070884 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000070884 590__ $$a7.082$$b2017
000070884 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b32 / 285 = 0.112$$c2017$$dQ1$$eT1
000070884 591__ $$aCHEMISTRY, PHYSICAL$$b25 / 146 = 0.171$$c2017$$dQ1$$eT1
000070884 592__ $$a2.226$$b2017
000070884 593__ $$aChemistry (miscellaneous)$$c2017$$dQ1
000070884 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000070884 700__ $$aChung, N. X.
000070884 700__ $$aLimpens, R.
000070884 700__ $$aGomez, L.
000070884 700__ $$0(orcid)0000-0002-4546-4111$$aHueso, J. L.
000070884 700__ $$0(orcid)0000-0002-8701-9745$$aSantamaria, J.$$uUniversidad de Zaragoza
000070884 700__ $$aGregorkiewicz, T.
000070884 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Ingeniería Química
000070884 773__ $$g117 (2017), 437-446$$pCarbon$$tCarbon$$x0008-6223
000070884 8564_ $$s9196893$$uhttps://zaguan.unizar.es/record/70884/files/texto_completo.pdf$$yVersión publicada
000070884 8564_ $$s99738$$uhttps://zaguan.unizar.es/record/70884/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000070884 909CO $$ooai:zaguan.unizar.es:70884$$particulos$$pdriver
000070884 951__ $$a2019-07-09-12:01:28
000070884 980__ $$aARTICLE