Low Energy Implantation into Transition-Metal Dichalcogenide Monolayers to Form Janus Structures

ACS Nano
Yu-Chuan LinDavid B Geohegan

Abstract

Atomically thin two-dimensional (2D) materials face significant energy barriers for synthesis and processing into functional metastable phases such as Janus structures. Here, the controllable implantation of hyperthermal species from pulsed laser deposition (PLD) plasmas is introduced as a top-down method to compositionally engineer 2D monolayers. The kinetic energies of Se clusters impinging on suspended monolayer WS2 crystals were controlled in the <10 eV/atom range with in situ plasma diagnostics to determine the thresholds for selective top layer replacement of sulfur by selenium for the formation of high quality WSSe Janus monolayers at low (300 °C) temperatures and bottom layer replacement for complete conversion to WSe2. Atomic-resolution electron microscopy and spectroscopy in tilted geometry confirm the WSSe Janus monolayer. Molecular dynamics simulations reveal that Se clusters implant to form disordered metastable alloy regions, which then recrystallize to form highly ordered structures, demonstrating low-energy implantation by PLD for the synthesis of 2D Janus layers and alloys of variable composition.

References

Aug 16, 1996·Science·D H LowndesC M Rouleau
Apr 15, 1995·Physical Review. B, Condensed Matter·H HaberlandM Moseler
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Dec 7, 2010·ACS Nano·Jeremy J JacksonDavid B Geohegan
Aug 3, 2012·The Journal of Chemical Physics·K KooserE Kukk
Aug 7, 2012·Physical Review Letters·Hannu-Pekka KomsaArkady V Krasheninnikov
Feb 26, 2013·Nano Letters·Yanyuan ZhaoQihua Xiong
Mar 21, 2013·Nature Chemistry·Manish ChhowallaHua Zhang
Sep 26, 2013·Nano Letters·U BangertH Hofsäss
Apr 9, 2014·Nanoscale·Liangbo Liang, Vincent Meunier
Jul 23, 2015·Nature Communications·Masoud Mahjouri-SamaniDavid B Geohegan
Dec 6, 2012·The Journal of Physical Chemistry Letters·Hannu-Pekka Komsa, Arkady V Krasheninnikov
Nov 23, 2016·Advanced Materials·Peng YuZheng Liu
May 17, 2017·Nature Nanotechnology·Ang-Yu LuLain-Jong Li
Jul 15, 2017·Advanced Materials·Sandhya SusarlaPulickel M Ajayan
Aug 5, 2017·ACS Nano·Jing ZhangJun Lou
Jun 16, 2018·Physical Chemistry Chemical Physics : PCCP·A Kandemir, H Sahin
Oct 20, 2018·Nano Letters·Mattias PalsgaardMads Brandbyge
Jun 15, 2019·ACS Applied Materials & Interfaces·Binjie HuangJohn T L Thong
Oct 16, 2019·ACS Nano·Anders C Riis-JensenKristian S Thygesen

❮ Previous
Next ❯

Citations

Nov 12, 2020·Advanced Materials·Dipesh B TrivediSefaattin Tongay
Aug 7, 2021·Proceedings of the National Academy of Sciences of the United States of America·Yunfan GuoJing Kong
Aug 28, 2021·Proceedings of the National Academy of Sciences of the United States of America·M B SreedharaReshef Tenne
Jan 7, 2021·Nano Letters·Ting ZhengHui Zhao
Sep 19, 2020·Journal of the American Chemical Society·Kunyan ZhangShengxi Huang

❮ 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.

Related Papers

Revue médicale suisse
B Hoerni
Archives des maladies du coeur et des vaisseaux
J BRET
American Journal of Surgery
W F Sasser
Biomédica : revista del Instituto Nacional de Salud
Adalberto Laszlo
© 2021 Meta ULC. All rights reserved