Unipolar assembly of zinc oxide rods manifesting polarity-driven collective luminescence.

Proceedings of the National Academy of Sciences of the United States of America
Ujjal K GautamC N R Rao

Abstract

Oriented assemblies of small crystals forming larger structures are common in nature and crucial for forthcoming technologies as they circumvent the difficulties of structural manipulation at microscopic scale. We have discovered two distinctive concentric assemblies of zinc oxide rods, wherein each rod has an intrinsically positive and a negative polar end induced by the noncentrosymmetric arrangement of Zn and O atoms. All the rods in a single assembly emanate out of a central core maintaining a single polar direction. Due to growth along the two polar surfaces with different atomic arrangements, these assemblies are distinct in their intrinsic properties and exhibit strong UV luminescence in the exterior of Zn-polar assemblies, unlike the O-polar assemblies. Although novel applications can be envisioned, these observations suggest that hierarchical organization with respect to internal asymmetry might be widespread in natural crystal assemblies.

References

Jun 9, 2001·Science·M H HuangP Yang
Mar 30, 2002·Science·George M Whitesides, Bartosz Grzybowski
Feb 6, 2003·Angewandte Chemie·Zhengrong R TianHuifang Xu
May 24, 2003·Nature Materials·Liberato MannaA Paul Alivisatos
Nov 13, 2003·Physical Review Letters·Z L WangJ M Zuo
May 6, 2005·Nature·Paul Madden
Apr 15, 2006·Science·Zhong Lin Wang, Jinhui Song
Jul 18, 2006·Nature Materials·Tomorr HaxhimaliMichel Rappaz
Nov 28, 1969·Science·G Donnay, D L Pawson
Nov 17, 2007·Journal of the American Chemical Society·Elizabeth A Kulp, Jay A Switzer
Jan 20, 2009·Science·Juan Manuel García-RuizStephen T Hyde

❮ Previous
Next ❯

Citations

Oct 5, 2013·The Journal of Chemical Physics·Zhunzhun WangJinlong Yang
Aug 15, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Weina JiaXiang Wu
Jul 25, 2013·Small·Boluo YadianYizhong Huang
Nov 21, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Abdulrahman Syedahamed Haja HameedGanesan Ravi
Jan 29, 2011·Advanced Materials·Xiaosheng FangLinfeng Hu
Oct 20, 2012·Chemistry : a European Journal·Ming-Han LiuChung-Yuan Mou
Jul 25, 2019·Materials·Leonard BrillsonMarius Grundmann
Jan 28, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Guo-Xiu TongXian Hu
Apr 11, 2013·ACS Applied Materials & Interfaces·Binh DuongJayan Thomas
Jun 26, 2018·Journal of the American Chemical Society·Maria Chiara di GregorioMilko E van der Boom

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.