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

Abstract

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.

Authors:
;  [1]
  1. Department of Materials Science and Engineering, Centennial Campus, North Carolina State University, Raleigh, North Carolina 27695-7907 (United States)
Publication Date:
OSTI Identifier:
22499205
Resource Type:
Journal Article
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2166-532X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ATMOSPHERIC PRESSURE; CONVERSION; COOLING; CRYSTALS; FILMS; LASERS; NUCLEATION; PULSES; QUENCHING

Citation Formats

Narayan, Jagdish, E-mail: narayan@ncsu.edu, and Bhaumik, Anagh. Research Update: Direct conversion of amorphous carbon into diamond at ambient pressures and temperatures in air. United States: N. p., 2015. Web. doi:10.1063/1.4932622.
Narayan, Jagdish, E-mail: narayan@ncsu.edu, & Bhaumik, Anagh. Research Update: Direct conversion of amorphous carbon into diamond at ambient pressures and temperatures in air. United States. doi:10.1063/1.4932622.
Narayan, Jagdish, E-mail: narayan@ncsu.edu, and Bhaumik, Anagh. Thu . "Research Update: Direct conversion of amorphous carbon into diamond at ambient pressures and temperatures in air". United States. doi:10.1063/1.4932622.
@article{osti_22499205,
title = {Research Update: Direct conversion of amorphous carbon into diamond at ambient pressures and temperatures in air},
author = {Narayan, Jagdish, E-mail: narayan@ncsu.edu and Bhaumik, Anagh},
abstractNote = {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.},
doi = {10.1063/1.4932622},
journal = {APL Materials},
issn = {2166-532X},
number = 10,
volume = 3,
place = {United States},
year = {2015},
month = {10}
}