Carbogenic Nanodots: Photoluminescence and Room-Temperature Ferromagnetism

Herein, blue fluorescent carbogenic nanodots (CNDs) with room‐temperature ferromagnetism were synthesized by thermal decomposition of organic precursors at different temperatures. Photoluminescence (PL) studies show excitation‐wavelength‐dependent emission properties and PL excitation (PLE) studies...

Full description

Saved in:
Bibliographic Details
Published in:Chemphyschem 2011-10, Vol.12 (14), p.2624-2632
Main Authors: Srivastava, Sachchidanand, Gajbhiye, Namdeo S.
Format: Article
Language:English
Subjects:
carbogenic nanodots
Condensed matter: electronic structure, electrical, magnetic, and optical properties
EPR spectroscopy
Exact sciences and technology
graphene
magnetic properties
Magnetic properties and materials
Magnetic properties of nanostructures
Nanocrystals and nanoparticles
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
photoluminescence
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Herein, blue fluorescent carbogenic nanodots (CNDs) with room‐temperature ferromagnetism were synthesized by thermal decomposition of organic precursors at different temperatures. Photoluminescence (PL) studies show excitation‐wavelength‐dependent emission properties and PL excitation (PLE) studies confirm the triplet ground state of carbene at the zigzag edge as the fluorescent center. Room‐temperature magnetic studies reveal the ferromagnetic nature of CNDs and temperature‐dependent studies show the presence of an antiferromagnetic phase along with a ferromagnetic phase below 50 K. EPR studies reveal the presence of conduction electrons and localized spins with different g factors. Localized spins at zigzag edges are the origin of the unconventional magnetic behavior, whereas exchange coupling between conduction and localized spins are responsible for long‐range magnetic ordering. A spot of blue: Blue‐fluorescent carbogenic nanodots (CNDs) are synthesized by thermal decomposition and their room‐temperature ferromagnetic nature is revealed. Photoluminescence (PL) studies show excitation‐wavelength‐dependent emission properties and PL excitation (PLE) studies confirm the triplet ground state of carbene at the zigzag edge as the fluorescent center (see picture).
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.201100188