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Facile preparation and upconversion luminescence of graphene quantum dotsw
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A facile hydrazine hydrate reduction of graphene oxide (GO) with surface-passivated by a polyethylene glycol (PEG) method for the fabrication of graphene quantum dots (GQDs) with frequency upconverted emission is presented. And we speculate on the upconversion luminescence due to the anti-Stokes photoluminescence (ASPL), where thedEbetween thepandrorbitals is near 1.1 eV. ±¾Îijö×ÔCHEM COMMUN .Ê×´ÎÑо¿ÁËPEG¶Û»¯µÄGQD¡£ÎÄÕÂÌá³öÁËÉÏת»»µÄ·¢¹â»úÀí¡£Õâ¶Ô·¢¹â»úÀíµÄÀí½â·Ç³£µÄÓаïÖú¡£ÎÒÈÏΪ·²Ñо¿Á¿×ӵ㷢¹âµÄ¶¼ÓбØÒª¿´Ò»Ï¡£ |
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2012-12-07 12:36:27, 1.19 M
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