Research Update: Direct conversion of amorphous carbon into diamond at ambient pressures and temperatures in air | Zendy

J. Narayan | Zendy; Anagh Bhaumik | Zendy

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Research Update: Direct conversion of amorphous carbon into diamond at ambient pressures and temperatures in air

Author(s) -

J. Narayan,

Anagh Bhaumik

Publication year - 2015

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4932622

Subject(s) - materials science , nanodiamond , diamond , amorphous solid , amorphous carbon , carbon fibers , nucleation , nanosecond , quenching (fluorescence) , diamond like carbon , nanotechnology , carbon film , optoelectronics , laser , chemical engineering , composite material , thin film , optics , crystallography , organic chemistry , chemistry , physics , engineering , fluorescence , composite number

We report on fundamental discovery of conversion of amorphous carbon into diamond by irradiating amorphous carbon films with nanosecond lasers at room-temperature in air at atmospheric pressure. We can create diamond in the form of nanodiamond (size range <100 nm) and microdiamond (>100 nm). Nanosecond laser pulses are used to melt amorphous diamondlike carbon and create a highly undercooled state, from which various forms of diamond can be formed upon cooling. The quenching from the super undercooled state results in nucleation of nanodiamond. It is found that microdiamonds grow out of highly undercooled state of carbon, with nanodiamond acting as seed crystals

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