High-yield fabrication of suspended two-dimensional materials for atomic resolution imaging

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76273-76279 ◽  
Author(s):  
Jaehyun Han ◽  
Jun-Young Lee ◽  
Jeongun Choe ◽  
Jong-Souk Yeo
Keyword(s):  
Three Dimensional ◽  
Atomic Resolution ◽  
High Yield ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
Resolution Imaging

Two-dimensional (2D) atomic crystals are very interesting materials due to their unique properties, which are significantly different than those observed in conventional three-dimensional (3D) materials.

scholarly journals Probing Chemical Kinetics in Two Dimensional Materials Using Atomic Resolution Imaging.

2020 ◽  
Vol 26 (S2) ◽  
pp. 90-90
Author(s):  
Stephen Skowron ◽  
Chen Huang ◽  
Angus Kirkland ◽  
Andrey Chuvilin ◽  
Elena Besley
Keyword(s):  
Chemical Kinetics ◽  
Atomic Resolution ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
Resolution Imaging

scholarly journals Polarization-sensitive photodetectors based on three-dimensional molybdenum disulfide (MoS2) field-effect transistors

Nanophotonics ◽  
2020 ◽  
Vol 9 (16) ◽  
pp. 4719-4728
Author(s):  
Tao Deng ◽  
Shasha Li ◽  
Yuning Li ◽  
Yang Zhang ◽  
Jingye Sun ◽  
...  
Keyword(s):  
Molybdenum Disulfide ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Three Dimensional ◽  
Polarized Light ◽  
Optical Field ◽  
Two Dimensional ◽  
Polarization Ratio ◽  
Two Dimensional Materials

AbstractThe molybdenum disulfide (MoS2)-based photodetectors are facing two challenges: the insensitivity to polarized light and the low photoresponsivity. Herein, three-dimensional (3D) field-effect transistors (FETs) based on monolayer MoS2 were fabricated by applying a self–rolled-up technique. The unique microtubular structure makes 3D MoS2 FETs become polarization sensitive. Moreover, the microtubular structure not only offers a natural resonant microcavity to enhance the optical field inside but also increases the light-MoS2 interaction area, resulting in a higher photoresponsivity. Photoresponsivities as high as 23.8 and 2.9 A/W at 395 and 660 nm, respectively, and a comparable polarization ratio of 1.64 were obtained. The fabrication technique of the 3D MoS2 FET could be transferred to other two-dimensional materials, which is very promising for high-performance polarization-sensitive optical and optoelectronic applications.

scholarly journals Tip-Based Nanomachining on Thin Films: A Mini Review

2021 ◽  
Author(s):  
Shunyu Chang ◽  
Yanquan Geng ◽  
Yongda Yan
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Data Storage ◽  
Three Dimensional ◽  
Maintenance Cost ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Atomic Force ◽  
Current State ◽  
Two Dimensional Materials

AbstractAs one of the most widely used nanofabrication methods, the atomic force microscopy (AFM) tip-based nanomachining technique offers important advantages, including nanoscale manipulation accuracy, low maintenance cost, and flexible experimental operation. This technique has been applied to one-, two-, and even three-dimensional nanomachining patterns on thin films made of polymers, metals, and two-dimensional materials. These structures are widely used in the fields of nanooptics, nanoelectronics, data storage, super lubrication, and so forth. Moreover, they are believed to have a wide application in other fields, and their possible industrialization may be realized in the future. In this work, the current state of the research into the use of the AFM tip-based nanomachining method in thin-film machining is presented. First, the state of the structures machined on thin films is reviewed according to the type of thin-film materials (i.e., polymers, metals, and two-dimensional materials). Second, the related applications of tip-based nanomachining to film machining are presented. Finally, the current situation of this area and its potential development direction are discussed. This review is expected to enrich the understanding of the research status of the use of the tip-based nanomachining method in thin-film machining and ultimately broaden its application.

General, Vertical, Three-Dimensional Printing of Two-Dimensional Materials with Multiscale Alignment

ACS Nano ◽  
2019 ◽  
Vol 13 (11) ◽  
pp. 12653-12661 ◽  
Author(s):  
Zhiqiang Liang ◽  
Yong Pei ◽  
Chaoji Chen ◽  
Bo Jiang ◽  
Yonggang Yao ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Two Dimensional ◽  
Three Dimensional Printing ◽  
Two Dimensional Materials ◽  
Dimensional Printing

Electron Crystallographic Determination of the Structure of Bacteriorhodopsin

1990 ◽  
Vol 48 (1) ◽  
pp. 90-91
Author(s):  
R. Henderson ◽  
J.M. Baldwin ◽  
T.A. Ceska ◽  
E. Beckman ◽  
F. Zemlin ◽  
...  
Keyword(s):  
High Resolution ◽  
Proton Pump ◽  
Three Dimensional ◽  
Atomic Resolution ◽  
Two Dimensional ◽  
New Methods ◽  
Density Map ◽  
Diffraction Patterns

The light driven proton pump bacteriorhodopsin (bR) occurs naturally as two-dimensional crystals. A three-dimensional density map of the structure, at near atomic resolution, has been obtained by studying the crystals using electron cryo-microscopy to obtain diffraction patterns and high resolution micrographs (1).New methods have been developed for analysing micrographs from tilted specimens, incorporating the methods previously developed for untilted specimens that enable large areas to be analysed and corrected for distortions. Data from 72 images, from both tilted and untilted specimens, have been analysed to produce the phases of 2700 independent Fourier components of the structure. The amplitudes of these components have been accurately measured from 150 diffraction patterns. Together, these data represent about half of the full three-dimensional transform to 3.5 Å. The distribution of the data which is included in the map is shown in fig. 1. For specimen tilts up to around 20° the data is essentially complete. For higher tilts the data is more sparsely sampled, and is at present about half complete.

scholarly journals 3D continuum phonon model for group-IV 2D materials

2017 ◽  
Vol 8 ◽  
pp. 1345-1356 ◽  
Author(s):  
Morten Willatzen ◽  
Lok C Lew Yan Voon ◽  
Appala Naidu Gandi ◽  
Udo Schwingenschlögl
Keyword(s):  
Molybdenum Disulfide ◽  
Density Functional ◽  
Three Dimensional ◽  
Functional Results ◽  
Group Iv ◽  
Two Dimensional ◽  
Phonon Modes ◽  
Long Wavelength ◽  
Phonon Spectra ◽  
Two Dimensional Materials

A general three-dimensional continuum model of phonons in two-dimensional materials is developed. Our first-principles derivation includes full consideration of the lattice anisotropy and flexural modes perpendicular to the layers and can thus be applied to any two-dimensional material. In this paper, we use the model to not only compare the phonon spectra among the group-IV materials but also to study whether these phonons differ from those of a compound material such as molybdenum disulfide. The origin of quadratic modes is clarified. Mode coupling for both graphene and silicene is obtained, contrary to previous works. Our model allows us to predict the existence of confined optical phonon modes for the group-IV materials but not for molybdenum disulfide. A comparison of the long-wavelength modes to density-functional results is included.

High-yield exfoliation of three-dimensional graphite into two-dimensional graphene-like sheets

2010 ◽  
Vol 46 (34) ◽  
pp. 6320 ◽  
Author(s):  
Eun-Kyoung Choi ◽  
In-Yup Jeon ◽  
Seo-Yoon Bae ◽  
Hwa-Jung Lee ◽  
Hyeon Suk Shin ◽  
...  
Keyword(s):  
Three Dimensional ◽  
High Yield ◽  
Two Dimensional

Towards the ionic limit of two-dimensional materials: monolayer alkaline earth and transition metal halides

2014 ◽  
Vol 16 (38) ◽  
pp. 20763-20771 ◽  
Author(s):  
Shi-Hsin Lin ◽  
Jer-Lai Kuo
Keyword(s):  
Transition Metal ◽  
Alkaline Earth ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Metal Halides ◽  
Two Dimensional Materials ◽  
Ionic Limit

We theoretically explored new two-dimensional materials near the ionic instability (three-dimensional structures are favored), with covalent bonded systems (graphene) sitting at the opposite end of the spectrum.

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