Spatially Controlled Fabrication and Mechanisms of Atomically Thin Nanowell Patterns in Bilayer WS Using High Temperature Electron Microscopy.

07:00 EST 3rd December 2019 | BioPortfolio

Summary of "Spatially Controlled Fabrication and Mechanisms of Atomically Thin Nanowell Patterns in Bilayer WS Using High Temperature Electron Microscopy."

We show controlled production of atomically thin nanowells in bilayer WS using an heating holder combined with a focused electron beam in a scanning transmission electron microscope (STEM). We systematically study the formation and evolvement mechanism involved in removing a single layer of WS within a bilayer region with 2 nm accuracy in location and without punching through to the other layer to create a hole. Best results are found when using a high temperature of 800 °C, because it enables thermally activated atomic migration and eliminates the interference from surface carbon contamination. We demonstrate precise control over spatial distributions with 5 nm accuracy of patterning and the width of nanowells adjustable by dose-dependent parameters. The mechanism of removing a monolayer of WS within a bilayer region is different than removing equivalent sections in a monolayer film due to the van der Waals interaction of the underlying remaining layer in the bilayer system that stabilizes the excess W atom stoichiometry within the edges of the nanowell structure and facilitates expansion. This study offers insights for the nanoengineering of nanowells in two-dimensional (2D) transitional metal dichalcogenides (TMDs), which could hold potential as selective traps to localize 2D reactions in molecules and ions, underpinning the broader utilization of 2D material membranes.


Journal Details

This article was published in the following journal.

Name: ACS nano
ISSN: 1936-086X


DeepDyve research library

PubMed Articles [16943 Associated PubMed Articles listed on BioPortfolio]

Atomically Thin Boron Nitride as an Ideal Spacer for Metal-Enhanced Fluorescence.

The metal-enhanced fluorescence (MEF) considerably enhances the luminescence for various applications, but its performance largely depends on the dielectric spacer between the fluorophore and plasmoni...

Capillary Origami with Atomically Thin Membranes.

Small-scale optical and mechanical components and machines require control over three-dimensional structure at the microscale. Inspired by the analogy between paper and two-dimensional materials, orig...

Linearly Polarized Luminescence of Atomically-Thin MoS Semiconductor Nanocrystals.

Atomically-thin layers of transition metal dichalcogenides semiconductors, such as MoS, exhibit strong and circularly polarized light emission due to inherent crystal symmetries, pronounced spin-orbit...

Single Variable Defined Technology Control of the Optical Properties in MoS2 Films with Controlled Number of 2D-layers.

Fabrication of the practical devices based on the transient metal dichalcogenides (TMDs) can be successively extended to various areas of the applications if the large area growth technology can be in...

Controlled synthesis of nanostructured glassy and crystalline high entropy alloy films.

High entropy alloy (HEA) based thin films have been attracting increasing research interest recently because of their unique mechanical/physical properties. However, the physical mechanisms that gover...

Clinical Trials [4809 Associated Clinical Trials listed on BioPortfolio]

Comparison Imaging System Between Spatially Modulated Quantitative Spectroscopy and Skin Spect Dermoscopy

The purpose of this study is to obtain skin spectroscopic data from two imaging systems. Comparison groups: - Skin Spect dermoscope - Spatially modulated quantitative spectr...

Thin Catheter for Hysterosalpigography

Hysterosalpingography is usually painful and the use of thin catheters of IUI could be an attractive alternative . we conducted a randomised controlled trial to compare the standard metal ...

A Randomized Controlled Trial of a Water Protocol for Clients With Thin Liquid Dysphagia

The Purpose of the GF Strong water protocol is to allow clients who have thin liquid dysphagia to drink water under certain specified conditions according to the rules of the water protoco...

Dietary Patterns, Metabolomics and Colorectal Cancer Risk

Colorectal cancer (CRC) is the third most commonly diagnosed cancer in American men and women with ≥130,000 new cases each year. Several dietary patterns have been associated with CRC ri...

Simplified Versus Conventional Technique for Complete Denture Fabrication.

The purpose of this study is to evaluate the effectiveness of a simplified technique of conventional dentures fabrication, comparing it to a traditional technique, by evaluating the impact...

Medical and Biotech [MESH] Definitions

Manufacturing technology for making microscopic devices in the micrometer range (typically 1-100 micrometers), such as integrated circuits or MEMS. The process usually involves replication and parallel fabrication of hundreds or millions of identical structures using various thin film deposition techniques and carried out in environmentally-controlled clean rooms.

Implanted fluid propulsion systems with self-contained power source for providing long-term controlled-rate delivery of drugs such as chemotherapeutic agents or analgesics. Delivery rate may be externally controlled or osmotically or peristatically controlled with the aid of transcutaneous monitoring.

The very long and thin extensions of telocytes' cell surface, that have alternating thick and thin sections called podoms and podomers.

Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

Patterns of practice in nursing related to provision of services including diagnosis and treatment.

Quick Search

DeepDyve research library

Relevant Topic

Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...

Searches Linking to this Article