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Crystals, Volume 11, Issue 8

August 2021 - 168 articles

Cover Story: Subjected to the spherical curvature and confinement without edges of shells—surrounded by water and also enclosing a droplet of water—the long-range-ordered self-organization in liquid crystals can give rise to many new phenomena. Here, we see the phase transition from nematic to smectic order in a shell where the outer boundary imposes tangential and the inner normal director orientation. The conflicting boundary conditions lead to a nematic phase with precisely two antipodal topological defects, which then seed a well-ordered arrangement of focal conic defects in the smectic phase. The reduced order at the defects produces local reductions in density, leading to unconventional shell orientation if the shell is near-density-matched to the water phases. View this paper
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Articles (168)

  • Review
  • Open Access
8 Citations
3,818 Views
16 Pages

Properties of Barium Cerate-Zirconate Thin Films

  • Piotr Winiarz,
  • Monica Susana Campos Covarrubias,
  • Mantas Sriubas,
  • Kristina Bockute,
  • Tadeusz Miruszewski,
  • Wojciech Skubida,
  • Daniel Jaworski,
  • Giedrius Laukaitis and
  • Maria Gazda

23 August 2021

In this work, we review several experimental results showing the electrical properties of barium cerate-zirconate thin films and discuss them in view of the possible influence of various factors on their properties. Most of the presented Ba(Ce, Zr, Y...

  • Article
  • Open Access
22 Citations
4,520 Views
12 Pages

Highly Conductive n-Al0.65Ga0.35N Grown by MOCVD Using Low V/III Ratio

  • Christian J. Zollner,
  • Yifan Yao,
  • Michael Wang,
  • Feng Wu,
  • Michael Iza,
  • James S. Speck,
  • Steven P. DenBaars and
  • Shuji Nakamura

23 August 2021

Highly conductive silicon-doped AlGaN and ohmic contacts are needed for deep-UV LEDs and ultrawide bandgap electronics. We demonstrate improved n-Al0.65Ga0.35N films grown by metal–organic chemical vapor deposition (MOCVD) on sapphire substrates usin...

  • Communication
  • Open Access
4 Citations
2,610 Views
5 Pages

23 August 2021

50Bi2O3-30B2O3-20ZnO (mol.%) glass was designed and prepared in our previous work. On the basis of preliminary work on DSC analysis, the crystallization behavior of the glass was further investigated in the present work. The results showed that Bi38Z...

  • Review
  • Open Access
11 Citations
6,490 Views
15 Pages

23 August 2021

The ionic transport and the mechanical properties in solids are intimately related. However, few studies have been done to elucidate the background of that relation. With the objective to fill this gap and gain further understanding on the fundamenta...

  • Article
  • Open Access
2 Citations
2,712 Views
12 Pages

A Study of the Characteristics of Plasma Generated by Infrared Pulse Laser-Induced Fused Silica

  • Lixue Wang,
  • Xudong Sun,
  • Congrui Geng,
  • Zequn Zhang and
  • Jixing Cai

23 August 2021

When high energy infrared laser pulses are incident on fused silica, the surface of the fused silica is damaged and a laser-induced plasma is produced. Based on the theory of fluid mechanics and gas dynamics, a two-dimensional axisymmetric gas dynami...

  • Article
  • Open Access
1 Citations
2,772 Views
10 Pages

Research on Shock Acceleration Limit of an Ultra-Stable Optical Cavity for Space Applications Based on the Finite Element Methodology

  • Guanjun Xu,
  • Dongdong Jiao,
  • Long Chen,
  • Linbo Zhang,
  • Jun Liu,
  • Ruifang Dong,
  • Tao Liu and
  • Junbiao Wang

22 August 2021

Ultra-stable optical cavities (USOCs) as fragile precision instruments have many important applications in space. In order to protect them from being damaged during a rocket launch, we analyzed a USOC by means of finite element methodology. The shock...

  • Article
  • Open Access
11 Citations
2,762 Views
11 Pages

22 August 2021

In recent years, the sludge produced by municipal sewage treatment plants has become an important recyclable resource for producing green building materials. After the systematic processing of incineration and particle formation, the sintered sludge...

  • Article
  • Open Access
17 Citations
4,064 Views
16 Pages

Microwave Absorption Performance of Single-Layer and Multi-Layer Structures Prepared by CNTs/Fe3O4 Nonwoven Materials

  • Rong Zhan,
  • Jiaqiao Zhang,
  • Qiang Gao,
  • Qi Jia,
  • Zhixiang Zhang,
  • Guangyu Zhang and
  • Wenyan Gu

22 August 2021

Electromagnetic radiation can cause serious harm to the human body, such as the rise in body temperature and the decrease in immune function. In this study, the carbon nanotubes (CNTs)/Fe3O4 nonwovens were used to prepare wearable flexible absorbing...

  • Article
  • Open Access
7 Citations
3,922 Views
22 Pages

22 August 2021

Assessing the sulfate resistance of concrete is essential for the use of concrete in sulfate rich environments. A multitude of test methods exists worldwide, showing the relevance of the problem and the difficulty to find a suitable test setup. Testi...

  • Article
  • Open Access
12 Citations
4,123 Views
21 Pages

Effect of Ultrafine Additives on the Morphology of Cement Hydration Products

  • Grigory Yakovlev,
  • Rostislav Drochytka,
  • Gintautas Skripkiūnas,
  • Larisa Urkhanova,
  • Irina Polyanskikh,
  • Igor Pudov,
  • Ekaterina Karpova,
  • Zarina Saidova and
  • Ali E. M. M. Elrefai

22 August 2021

The present research is focused on the investigation of the influence of ultrafine additives on the structure formation of hardened cement paste and the establishment of the mechanisms of the morphological transformations, which determine the propert...

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Crystals - ISSN 2073-4352