Magnetic Properties and Engineering of Nanographene in Ultra?High Vacuum

Due to the existence of unsaturated electrons, it is difficult to synthesize magnetic nanographene directly by the wet chemical method. With the help of surface catalysis in ultra over line high vacuum, designed precursor molecules can be transformed into magnetic nanographene. Magnetism of carbon nanomaterials or nanographene possess high magnitudes of spin over line wave stiffness, weak spin over line orbit coupling, hyperfine couplings and large spin coherence lifetimes comparing with the transition metal, which hold the promise for spintronics construction and basic research. Due to the existence of unsaturated electrons, it is difficult to synthesize magnetic nanographene directly by the wet chemical method. With the help of surface catalysis in ultra over line high vacuum, the synthesis of magnetic nanographene by artificial designed precursor molecules has been exploding. Except for the fabrication the magnetic nanographene, the investigation of magnetic ground state of nanographene itself and the magnetic engineering by tip over line manipulation and construction of spin chains have been attracting much attentions. The atomic precise chemical and electronic structure and magnetic ground state could be identified by scanning tunneling spectroscopy and CO over line decorated tip scanning tunneling microscope image. In this review??? based on the recent research on nanographene ??? we introduce magnetic generations??? structural and magnetism characterizations of nanographene as well as the magnetic order control by scanning tunneling microscopy in ultra over line high vacuum.