Experimental Growth of New 6-fold Symmetry Patterned Microcrystals of AlN

Equilibrium Structures and Growth Mechanism

Hayk H. Nersisyan, Daeyoung Kim, Bunguk Yoo, Woojong Kang, Byungchan Han, Jonghyeon Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

For the first time, we experimentally detected the formation of 6-fold symmetry patterned microcrystals of AlN (aluminum nitride), such as simple prisms, stellar and sectored plates, and stellar and fernlike stellar dendrites. These crystals were formed during combustion of a solid mixture of Al + kAlF3 (k = 0.05-0.1 mol) under a nitrogen atmosphere (PN2 = 2.5 MPa). The combustion temperature recorded with a thermocouple was in the 1700-1900 °C range. We examined the physical mechanisms governing the formation of AlN crystals, and we treated this problem as a case study of the dynamics of crystal growth from the liquid phase. Particular attention was given to the basic theoretical understanding of the subject, utilizing first-principles density functional theory calculations. The Wulff construction method was applied to identify equilibrium structures of nano- and microscale AlN crystals. Energy minimization arguments were used to show that certain crystal planes of AlN are more probable than others, giving the crystal 6-fold symmetry. The integrated experiments and computations form the basis for our proposal of the underlying mechanisms for nucleation and growth of the AlN crystals.

Original languageEnglish
Pages (from-to)5305-5311
Number of pages7
JournalCrystal Growth and Design
Volume16
Issue number9
DOIs
Publication statusPublished - 2016 Sep 7

Fingerprint

Microcrystals
Aluminum nitride
aluminum nitrides
microcrystals
Crystal symmetry
Crystals
symmetry
crystals
combustion temperature
dendrites
thermocouples
Thermocouples
Crystallization
Prisms
Crystal growth
microbalances
prisms
Density functional theory
aluminum nitride
proposals

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Nersisyan, Hayk H. ; Kim, Daeyoung ; Yoo, Bunguk ; Kang, Woojong ; Han, Byungchan ; Lee, Jonghyeon. / Experimental Growth of New 6-fold Symmetry Patterned Microcrystals of AlN : Equilibrium Structures and Growth Mechanism. In: Crystal Growth and Design. 2016 ; Vol. 16, No. 9. pp. 5305-5311.
@article{7aec064756024388af696c4d32323596,
title = "Experimental Growth of New 6-fold Symmetry Patterned Microcrystals of AlN: Equilibrium Structures and Growth Mechanism",
abstract = "For the first time, we experimentally detected the formation of 6-fold symmetry patterned microcrystals of AlN (aluminum nitride), such as simple prisms, stellar and sectored plates, and stellar and fernlike stellar dendrites. These crystals were formed during combustion of a solid mixture of Al + kAlF3 (k = 0.05-0.1 mol) under a nitrogen atmosphere (PN2 = 2.5 MPa). The combustion temperature recorded with a thermocouple was in the 1700-1900 °C range. We examined the physical mechanisms governing the formation of AlN crystals, and we treated this problem as a case study of the dynamics of crystal growth from the liquid phase. Particular attention was given to the basic theoretical understanding of the subject, utilizing first-principles density functional theory calculations. The Wulff construction method was applied to identify equilibrium structures of nano- and microscale AlN crystals. Energy minimization arguments were used to show that certain crystal planes of AlN are more probable than others, giving the crystal 6-fold symmetry. The integrated experiments and computations form the basis for our proposal of the underlying mechanisms for nucleation and growth of the AlN crystals.",
author = "Nersisyan, {Hayk H.} and Daeyoung Kim and Bunguk Yoo and Woojong Kang and Byungchan Han and Jonghyeon Lee",
year = "2016",
month = "9",
day = "7",
doi = "10.1021/acs.cgd.6b00829",
language = "English",
volume = "16",
pages = "5305--5311",
journal = "Crystal Growth and Design",
issn = "1528-7483",
publisher = "American Chemical Society",
number = "9",

}

Experimental Growth of New 6-fold Symmetry Patterned Microcrystals of AlN : Equilibrium Structures and Growth Mechanism. / Nersisyan, Hayk H.; Kim, Daeyoung; Yoo, Bunguk; Kang, Woojong; Han, Byungchan; Lee, Jonghyeon.

In: Crystal Growth and Design, Vol. 16, No. 9, 07.09.2016, p. 5305-5311.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental Growth of New 6-fold Symmetry Patterned Microcrystals of AlN

T2 - Equilibrium Structures and Growth Mechanism

AU - Nersisyan, Hayk H.

AU - Kim, Daeyoung

AU - Yoo, Bunguk

AU - Kang, Woojong

AU - Han, Byungchan

AU - Lee, Jonghyeon

PY - 2016/9/7

Y1 - 2016/9/7

N2 - For the first time, we experimentally detected the formation of 6-fold symmetry patterned microcrystals of AlN (aluminum nitride), such as simple prisms, stellar and sectored plates, and stellar and fernlike stellar dendrites. These crystals were formed during combustion of a solid mixture of Al + kAlF3 (k = 0.05-0.1 mol) under a nitrogen atmosphere (PN2 = 2.5 MPa). The combustion temperature recorded with a thermocouple was in the 1700-1900 °C range. We examined the physical mechanisms governing the formation of AlN crystals, and we treated this problem as a case study of the dynamics of crystal growth from the liquid phase. Particular attention was given to the basic theoretical understanding of the subject, utilizing first-principles density functional theory calculations. The Wulff construction method was applied to identify equilibrium structures of nano- and microscale AlN crystals. Energy minimization arguments were used to show that certain crystal planes of AlN are more probable than others, giving the crystal 6-fold symmetry. The integrated experiments and computations form the basis for our proposal of the underlying mechanisms for nucleation and growth of the AlN crystals.

AB - For the first time, we experimentally detected the formation of 6-fold symmetry patterned microcrystals of AlN (aluminum nitride), such as simple prisms, stellar and sectored plates, and stellar and fernlike stellar dendrites. These crystals were formed during combustion of a solid mixture of Al + kAlF3 (k = 0.05-0.1 mol) under a nitrogen atmosphere (PN2 = 2.5 MPa). The combustion temperature recorded with a thermocouple was in the 1700-1900 °C range. We examined the physical mechanisms governing the formation of AlN crystals, and we treated this problem as a case study of the dynamics of crystal growth from the liquid phase. Particular attention was given to the basic theoretical understanding of the subject, utilizing first-principles density functional theory calculations. The Wulff construction method was applied to identify equilibrium structures of nano- and microscale AlN crystals. Energy minimization arguments were used to show that certain crystal planes of AlN are more probable than others, giving the crystal 6-fold symmetry. The integrated experiments and computations form the basis for our proposal of the underlying mechanisms for nucleation and growth of the AlN crystals.

UR - http://www.scopus.com/inward/record.url?scp=84986238296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84986238296&partnerID=8YFLogxK

U2 - 10.1021/acs.cgd.6b00829

DO - 10.1021/acs.cgd.6b00829

M3 - Article

VL - 16

SP - 5305

EP - 5311

JO - Crystal Growth and Design

JF - Crystal Growth and Design

SN - 1528-7483

IS - 9

ER -