scholarly journals Iron-rich talc as air-stable platform for magnetic two-dimensional materials

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Aleksandar Matković ◽  
Lukas Ludescher ◽  
Oleg E. Peil ◽  
Apoorva Sharma ◽  
Kevin-P. Gradwohl ◽  
...  
Keyword(s):  
Quantum Interference ◽  
Magnetic Ordering ◽  
High Spin State ◽  
Ferromagnetic Behavior ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
Force Microscopy ◽  
Two Dimensional Materials ◽  
Future Technologies ◽  
End Members

AbstractIntrinsically magnetic layered materials – especially monolayers – suffer from the lack of ambient stability and mostly exhibit magnetic ordering only at cryogenic temperatures. These restrains impose a great challenge for the integration of two-dimensional magnetic materials into future technologies. We propose to overcome this by exploiting phyllosilicates, such as iron-rich talc. Via combined magnetic force microscopy in applied external magnetic fields, superconducting quantum interference device magnetometry, first-principle calculations, and structural analysis, we demonstrate that incorporated iron ions in talc are in a very robust high spin state, resulting in a weak ferromagnetic behavior at room temperature. Iron-rich talc can be thinned down to a monolayer, remaining fully stable under ambient conditions, and retaining magnetic properties even in monolayers. Finally, we propose iron-rich end members of the phyllosilicates as very promising platforms for air-stable magnetic monolayers.

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.

Corrigendum to “Atomic force microscopy for two-dimensional materials: A tutorial review” [Opt. Commun. 406 (2018) 3–17]

2018 ◽  
Vol 421 ◽  
pp. 134
Author(s):  
Hang Zhang ◽  
Junxiang Huang ◽  
Yongwei Wang ◽  
Rui Liu ◽  
Xiulan Huai ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Atomic Force ◽  
Two Dimensional Materials

scholarly journals The tesseract in two dimensional materials, a DFT approach

RSC Advances ◽  
2020 ◽  
Vol 10 (15) ◽  
pp. 8618-8627 ◽  
Author(s):  
Long Zhou ◽  
Guanglong Zhang ◽  
Fangyuan Xiu ◽  
Shuwei Xia ◽  
Liangmin Yu
Keyword(s):  
Natural Gas ◽  
Molecular Sieve ◽  
High Selectivity ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
2D Material ◽  
Two Dimensional Materials

The tesseract contained 2D material, C24Se12, is an effective molecular sieve with high selectivity to recover helium from natural gas under ambient conditions.

scholarly journals Clay nanolayer encapsulation, evolving from origins of life to future technologies

2020 ◽  
Vol 229 (17-18) ◽  
pp. 2863-2879
Author(s):  
Jon Otto Fossum
Keyword(s):  
Graphene Oxide ◽  
Interlayer Space ◽  
State Of The Art ◽  
Origins Of Life ◽  
Two Dimensional ◽  
Naturally Occurring ◽  
Two Dimensional Materials ◽  
Natural Formation ◽  
Future Technologies ◽  
Life On Earth

AbstractClays are the siblings of graphite and graphene/graphene-oxide. There are two basic ways of using clays for encapsulation of sub-micron entities such as molecules, droplets, or nanoparticles, which is either by encapsulation in the interlayer space of clay nanolayered stacked particles (“the graphite way”), or by using exfoliated clay nanolayers to wrap entities in packages (“the graphene way”). Clays maybe the prerequisites for life on earth and can also be linked to the natural formation of other two-dimensional materials such as naturally occurring graphite and its allotropes. Here we discuss state-of-the-art in the area of clay-based encapsulation and point to some future scientific directions and technological possibilities that could emerge from research in this area.

scholarly journals A benzoxazine surfactant exchange for atomic force microscopy characterization of two dimensional materials exfoliated in aqueous surfactant solutions

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3222-3228 ◽  
Author(s):  
Tao Wang ◽  
Matthew D. J. Quinn ◽  
Shannon M. Notley
Keyword(s):  
Atomic Force Microscopy ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Atomic Force ◽  
Surfactant Solutions ◽  
Two Dimensional Materials ◽  
Liquid Phase Exfoliation ◽  
Microscopy Characterization ◽  
Atomic Force Microscopy Characterization

Surfactant exchange was utilized to successfully deposit 2D flakes from liquid phase exfoliation for AFM characterization.

scholarly journals Tuning the Magnetic Properties of Two-Dimensional MXenes by Chemical Etching

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 694
Author(s):  
Kemryn Allen-Perry ◽  
Weston Straka ◽  
Danielle Keith ◽  
Shubo Han ◽  
Lewis Reynolds ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Quantum Interference ◽  
Chemical Etching ◽  
Magnetic Measurements ◽  
Magnetic Transition ◽  
Structural Diversity ◽  
Two Dimensional ◽  
Transition Elements ◽  
Spintronic Devices ◽  
Two Dimensional Materials

Two-dimensional materials based on transition metal carbides have been intensively studied due to their unique properties including metallic conductivity, hydrophilicity and structural diversity and have shown a great potential in several applications, for example, energy storage, sensing and optoelectronics. While MXenes based on magnetic transition elements show interesting magnetic properties, not much is known about the magnetic properties of titanium-based MXenes. Here, we measured the magnetic properties of Ti3C2Tx MXenes synthesized by different chemical etching conditions such as etching temperature and time. Our magnetic measurements were performed in a superconducting quantum interference device (SQUID) vibrating sample. These data suggest that there is a paramagnetic-antiferromagnetic (PM-AFM) phase transition and the transition temperature depends on the synthesis procedure of MXenes. Our observation indicates that the magnetic properties of these MXenes can be tuned by the extent of chemical etching, which can be beneficial for the design of MXenes-based spintronic devices.

scholarly journals Long range intrinsic ferromagnetism in two dimensional materials and dissipationless future technologies

2018 ◽  
Vol 5 (4) ◽  
pp. 041105 ◽  
Author(s):  
Babar Shabbir ◽  
Muhammad Nadeem ◽  
Zhigao Dai ◽  
Michael S. Fuhrer ◽  
Qi-Kun Xue ◽  
...  
Keyword(s):  
Long Range ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
Intrinsic Ferromagnetism ◽  
Future Technologies

Building two-dimensional materials one row at a time: Avoiding the nucleation barrier

Science ◽  
2018 ◽  
Vol 362 (6419) ◽  
pp. 1135-1139 ◽  
Author(s):  
Jiajun Chen ◽  
Enbo Zhu ◽  
Juan Liu ◽  
Shuai Zhang ◽  
Zhaoyang Lin ◽  
...  
Keyword(s):  
Nucleation Theory ◽  
Classical Nucleation Theory ◽  
Free Energy Barrier ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Nucleation Barrier ◽  
Atomic Force ◽  
Wide Range ◽  
Two Dimensional Materials ◽  
Dynamics Simulations

Assembly of two-dimensional (2D) molecular arrays on surfaces produces a wide range of architectural motifs exhibiting unique properties, but little attention has been given to the mechanism by which they nucleate. Using peptides selected for their binding affinity to molybdenum disulfide, we investigated nucleation of 2D arrays by molecularly resolved in situ atomic force microscopy and compared our results to molecular dynamics simulations. The arrays assembled one row at a time, and the nuclei were ordered from the earliest stages and formed without a free energy barrier or a critical size. The results verify long-standing but unproven predictions of classical nucleation theory in one dimension while revealing key interactions underlying 2D assembly.

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