Self-assembly of InAs ring complexes on InP substrates by droplet epitaxy

2012 ◽  
Vol 112 (6) ◽  
pp. 063510 ◽  
Author(s):  
T. Noda ◽  
T. Mano ◽  
M. Jo ◽  
T. Kawazu ◽  
H. Sakaki
Keyword(s):  
Self Assembly ◽  
Droplet Epitaxy ◽  
Ring Complexes ◽  
Inp Substrates

scholarly journals Anomalous Stranski-Krastanov growth of (111)-oriented quantum dots with tunable wetting layer thickness

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Christopher F. Schuck ◽  
Simon K. Roy ◽  
Trent Garrett ◽  
Qing Yuan ◽  
Ying Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Tensile Strain ◽  
Quantum Systems ◽  
Growth Mode ◽  
Wetting Layer ◽  
Precise Control ◽  
Growth Regime ◽  
Inp Substrates ◽  
Lattice Matched

AbstractDriven by tensile strain, GaAs quantum dots (QDs) self-assemble on In0.52Al0.48As(111)A surfaces lattice-matched to InP substrates. In this study, we show that the tensile-strained self-assembly process for these GaAs(111)A QDs unexpectedly deviates from the well-known Stranski-Krastanov (SK) growth mode. Traditionally, QDs formed via the SK growth mode form on top of a flat wetting layer (WL) whose thickness is fixed. The inability to tune WL thickness has inhibited researchers’ attempts to fully control QD-WL interactions in these hybrid 0D-2D quantum systems. In contrast, using microscopy, spectroscopy, and computational modeling, we demonstrate that for GaAs(111)A QDs, we can continually increase WL thickness with increasing GaAs deposition, even after the tensile-strained QDs (TSQDs) have begun to form. This anomalous SK behavior enables simultaneous tuning of both TSQD size and WL thickness. No such departure from the canonical SK growth regime has been reported previously. As such, we can now modify QD-WL interactions, with future benefits that include more precise control of TSQD band structure for infrared optoelectronics and quantum optics applications.

Self-assembly of GaAs holed nanostructures by droplet epitaxy

2005 ◽  
Vol 202 (8) ◽  
pp. R85-R87 ◽  
Author(s):  
Zhiming M. Wang ◽  
Kyland Holmes ◽  
John L. Shultz ◽  
Gregory J. Salamo
Keyword(s):  
Self Assembly ◽  
Droplet Epitaxy

Self-assembly of GaAs holed nanostructures by droplet epitaxy

2005 ◽  
Vol 202 (8) ◽  
pp. 1339-1339 ◽  
Author(s):  
Zhiming M. Wang ◽  
Kyland Holmes ◽  
John L. Shultz ◽  
Gregory J. Salamo
Keyword(s):  
Self Assembly ◽  
Droplet Epitaxy

Self-Assembly of Multiple Stacked Nanorings by Vertically Correlated Droplet Epitaxy

2013 ◽  
Vol 24 (4) ◽  
pp. 530-535 ◽  
Author(s):  
Jiang Wu ◽  
Yusuke Hirono ◽  
Xinlei Li ◽  
Zhiming M. Wang ◽  
Jihoon Lee ◽  
...  
Keyword(s):  
Self Assembly ◽  
Droplet Epitaxy

Self-Assembly of GaAs Quantum Wires Grown on (311)A Substrates by Droplet Epitaxy

2011 ◽  
Vol 4 (5) ◽  
pp. 055501 ◽  
Author(s):  
Masafumi Jo ◽  
Joris. G. Keizer ◽  
Takaaki Mano ◽  
Paul M. Koenraad ◽  
Kazuaki Sakoda
Keyword(s):  
Self Assembly ◽  
Quantum Wires ◽  
Droplet Epitaxy

scholarly journals Self-assembly of metalla[3]catenanes, Borromean rings and ring-in-ring complexes using a simple π-donor unit

2020 ◽  
Vol 7 (10) ◽  
pp. 1548-1556 ◽  
Author(s):  
Ye Lu ◽  
Dong Liu ◽  
Yue-Jian Lin ◽  
Zhen-Hua Li ◽  
Guo-Xin Jin
Keyword(s):  
Strong Interaction ◽  
Molecular Species ◽  
Self Assembly ◽  
Crucial Role ◽  
Ring Structure ◽  
Borromean Rings ◽  
Formidable Challenge ◽  
Ring Complexes

Abstract Despite extensive research and several stunning breakthroughs in the synthesis of interlocked molecular species, [3]catenanes, Borromean rings and ring-in-ring complexes are exceedingly rare and their targeted synthesis remains a formidable challenge. Herein, a series of Cp*Rh-based homogeneous and heterogeneous interlocked structures have been prepared by coordination-driven self-assembly, not only including metalla[2]catenanes and molecular Borromean rings, but also linear metalla[3]catenanes and ring-in-ring complexes. The interlocked structures are all based on bithiophenyl groups. The bithiophenyl groups effectively enhance the strength of the inter-ring interactions and play a crucial role in the formation of these interlocked structures. By taking advantage of the strong interaction between π-donor (D) and π-acceptor (A) groups, the electron-deficient methylviologen cation was introduced into a cationic metallarectangle based on bithiophenyl groups. Taking inspiration from these results, a cationic metallarectangle based on A units was threaded into a metallarectangle based on D units, leading to a heterogeneous D–A ring-in-ring structure.

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