Growth of two dimensional silica and aluminosilicate bilayers on Pd(111): from incommensurate to commensurate crystalline

Physical Chemistry Chemical Physics : PCCP
Jin-Hao JhangEric I Altman

Abstract

Two-dimensional (2D) silica (SiO2) and aluminosilicate (AlSi3O8) bilayers grown on Pd(111) were fabricated and systematically studied using ultrahigh vacuum surface analysis in combination with theoretical methods, including Auger electron spectroscopy, X-ray photoelectron spectroscopy, low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), and density functional theory. Based on LEED results, both SiO2 and AlSi3O8 bilayers start ordering above 850 K in 2 × 10-6 Torr oxygen. Both bilayers show hexagonal LEED patterns with a periodicity approximately twice that of the Pd(111) surface. Importantly, the SiO2 bilayer forms an incommensurate crystalline structure whereas the AlSi3O8 bilayer crystallizes in a commensurate structure. The incommensurate crystalline SiO2 structure on Pd(111) resulted in a moiré pattern observed with LEED and STM. Theoretical results show that straining the pure SiO2 bilayer to match Pd(111) would cost 0.492 eV per unit cell; this strain energy is reduced to just 0.126 eV per unit cell by replacing 25% of the Si with Al which softens the material and expands the unstrained lattice. Furthermore, the missing electron created by substituting Al3+ for Si4+ is supplied by Pd creating a c...Continue Reading

References

Feb 15, 1995·Physical Review. B, Condensed Matter·G Makov, M C Payne
Aug 4, 2010·Nano Letters·Li GaoNathan P Guisinger
Jan 15, 2011·Physical Review Letters·D LöfflerJ Sauer
Nov 25, 2011·Angewandte Chemie·Leonid LichtensteinHans-Joachim Freund
Jan 25, 2012·Nano Letters·Pinshane Y HuangUte Kaiser
Apr 28, 2012·Angewandte Chemie·Jorge Anibal BoscoboinikHans-Joachim Freund
Jul 17, 2012·Physical Chemistry Chemical Physics : PCCP·Bing YangHans-Joachim Freund
Nov 22, 2012·Advanced Materials·Shamil Shaikhutdinov, Hans-Joachim Freund
May 23, 2013·ACS Nano·Ferdaous Ben RomdhaneFlorian Banhart
Dec 18, 2013·Scientific Reports·Torbjörn BjörkmanArkady V Krasheninnikov
Jul 6, 2014·Chemistry : a European Journal·Christin BüchnerHans-Joachim Freund
Mar 11, 2017·Science·Eva María GallegoAvelino Corma
Mar 11, 2017·ACS Applied Materials & Interfaces·Gregory S HutchingsEric I Altman

❮ Previous
Next ❯

Citations

Aug 23, 2018·Advanced Materials·Christopher J HeardSiglinda Perathoner
Dec 14, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·J Anibal Boscoboinik
Jul 2, 2019·Physical Chemistry Chemical Physics : PCCP·Petr DementyevArmin Gölzhäuser
Oct 30, 2020·Chemistry : a European Journal·Adrián Leandro LewandowskiHans-Joachim Freund
Mar 28, 2019·ACS Nano·Geoffroy KremerYannick Fagot-Revurat
Apr 25, 2018·Journal of the American Chemical Society·David KuhnessHans-Joachim Freund

❮ 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.