Micro- and Nanocubes of Carbon with C₈-like and Blue Luminescence

Abstract

Micro- and nanocubes of carbon have been synthesized by laser ablation in liquid. The morphology and structure analyses indicated that these micro- and nanocubes are single crystals with a body-centered cubic structure with a lattice constant of 5.46 angstroms, which is so-called C 8-like structure, and they have a slightly truncated shape bounded mainly by (200) facets. A blue-purple luminescence at room temperature was observed in the cathodoluminescence spectrum of the synthesized single micro- and nanocube of carbon, which exhibited that this unique carbon nanomaterial is a new semiconductor with blue luminescence. The physical and chemical mechanisms of the synthesis of carbon micro- and nanocubes were pursued upon laser ablation in liquid.

Pulsed laser ablation in liquid for micro-/nanostructure generation

“…They also synthesized carbon microand nanocubes ( Fig. 10A and B) with C 8 -like structure by PLA of amorphous carbon in a mixed solution of water, ethanol and acetone with the addition of inorganic salts such as KCl or NaCl, and considered the cubic morphology was caused by the salt ions [162]. Similar effect was observed by excimer laser ablation of Ag in aqueous solutions of NaCl, where micro-and nanocubes of AgCl were produced [89].…”

Broad Family of Carbon Nanoallotropes: Classification, Chemistry, and Applications of Fullerenes, Carbon Dots, Nanotubes, Graphene, Nanodiamonds, and Combined Superstructures

“…Three-dimensional carbon allotrope known as supercubane, which has a pcb or ACO topology. Liu et al 773,774 used the pulsed-laser-induced liquid−solid interface reaction (PLIIR) technique to generate the bodycentered cubic structure bcc-C 8 , which has a unit cell length of a = 5.46 Å. This structure exhibits blue-purple luminescence, with an emission band extending from 366 to 450 nm and distinct peaks at 367, 393, and 412 nm.…”

Fabrication and photocatalytic property of α-Bi2O3 nanoparticles by femtosecond laser ablation in liquid

“…Hence preparation of nanostructured Bi 2 O 3 photocatalysts doubtless deserves to be taken into account in future research. In recent years, laser ablation of a solid target in a liquid environment has been widely used in the synthesis of nanocrystals and fabrication of nanostructures due to the following advantages: (i) a chemically "simple and clean" synthesis [10][11][12], (ii) an ambient conditions not extreme temperature and pressure [13][14][15], (iii) the new phase formation of nanocrystals may involve in both liquid and solid [10], and (iv) structure, size, and shape of the synthesized nanocrystals can be controlled by tuning laser parameters and applied assistances [16][17][18][19][20][21][22][23]. Furthermore, compared with other normal laser ablation, femtosecond laser ablation has some advantages, such as higher temperature and higher pressure in a local volume can be achieved, higher temperature phase materials can be fabricated, and smaller nanocrystals with narrow size distribution can be obtained [10,12].…”