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.

Tailored multifunctional micellar brushes via crystallization-driven growth from a surface

Science ◽  
2019 ◽  
Vol 366 (6469) ◽  
pp. 1095-1098 ◽  
Author(s):  
Jiandong Cai ◽  
Chen Li ◽  
Na Kong ◽  
Yi Lu ◽  
Geyu Lin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Surface Functionalization ◽  
Two Dimensional ◽  
Graphene Oxide Nanosheets ◽  
Seeded Growth ◽  
Material Surfaces ◽  
Oil In Water ◽  
Two Dimensional Materials ◽  
Antibacterial Surface

The creation of nanostructures with precise chemistries on material surfaces is of importance in a wide variety of areas such as lithography, superhydrophobicity, and cell adhesion. We describe a platform for surface functionalization that involves the fabrication of cylindrical micellar brushes on a silicon wafer through seeded growth of crystallizable block copolymers at the termini of immobilized, surface-confined crystallite seeds. The density, length, and coronal chemistry of the micellar brushes can be precisely tuned, and post-growth decoration with nanoparticles enables applications in catalysis and antibacterial surface modification. The micellar brushes can also be grown on ultrathin two-dimensional materials such as graphene oxide nanosheets and further assembled into a membrane for the separation of oil-in-water emulsions and gold nanoparticles.

scholarly journals Optical Patterning of Two-Dimensional Materials

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15 ◽  
Author(s):  
Pavana Siddhartha Kollipara ◽  
Jingang Li ◽  
Yuebing Zheng
Keyword(s):  
Phase Transition ◽  
High Throughput ◽  
State Of The Art ◽  
2D Materials ◽  
Photonic Devices ◽  
Two Dimensional ◽  
Site Specific ◽  
On Demand ◽  
Two Dimensional Materials ◽  
Optical Patterning

Recent advances in the field of two-dimensional (2D) materials have led to new electronic and photonic devices enabled by their unique properties at atomic thickness. Structuring 2D materials into desired patterns on substrates is often an essential and foremost step for the optimum performance of the functional devices. In this regard, optical patterning of 2D materials has received enormous interest due to its advantages of high-throughput, site-specific, and on-demand fabrication. Recent years have witnessed scientific reports of a variety of optical techniques applicable to patterning 2D materials. In this minireview, we present the state-of-the-art optical patterning of 2D materials, including laser thinning, doping, phase transition, oxidation, and ablation. Several applications based on optically patterned 2D materials will be discussed as well. With further developments, optical patterning is expected to hold the key in pushing the frontiers of manufacturing and applications of 2D materials.

scholarly journals Graphene-based membranes: status and prospects

2016 ◽  
Vol 374 (2060) ◽  
pp. 20150024 ◽  
Author(s):  
Hee Wook Yoon ◽  
Young Hoon Cho ◽  
Ho Bum Park
Keyword(s):  
Graphene Oxide ◽  
Basal Plane ◽  
State Of The Art ◽  
Future Research ◽  
Two Dimensional ◽  
Research Directions ◽  
Graphene Layers ◽  
Future Research Directions ◽  
Simulation Results ◽  
Graphene Membranes

Recently, graphene-based membranes have been extensively studied, represented by two distinct research directions: (i) creating pores in graphene basal plane and (ii) engineering nanochannels in graphene layers. Most simulation results predict that porous graphene membranes can be much more selective and permeable than current existing membranes, also evidenced by some experimental results for gas separation and desalination. In addition, graphene oxide has been widely investigated in layered membranes with two-dimensional nanochannels, showing very intriguing separation properties. This review will cover state-of-the-art of graphene-based membranes, and also provide a material guideline on future research directions suitable for practical membrane applications.

Graphene oxide films, fibers, and membranes

2016 ◽  
Vol 5 (4) ◽  
Author(s):  
Rodolfo Cruz-Silva ◽  
Morinobu Endo ◽  
Mauricio Terrones
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
State Of The Art ◽  
Thermal Reduction ◽  
Two Dimensional ◽  
Processing Conditions ◽  
Electrically Conductive ◽  
Conductive Material ◽  
Energy Devices ◽  
Low Costs

AbstractGraphene oxide (GO) macroscopic films, fibers, and membranes have become important applications of this interesting two-dimensional material due to their specific properties and great potential as new high-performance materials. After chemical or thermal reduction, GO is transformed into an electrically conductive material termed reduced GO (RGO). These materials hold great potential because they can be prepared in large quantities at low costs, and consequently they are particularly suitable for applications in packaging, textiles, energy devices, and separation technologies. In the following years, the use of GO- and RGO-based films, fibers, and membranes is expected to grow; however, several challenges regarding its processing conditions must be resolved. In this review, we addressed some of the recent work regarding these important technologies and summarized the state of the art of GO films, fibers, and membranes.

Ni(II) dithiolate anion composites with two-dimensional materials for electrochemical oxygen evolution reactions (OER)

2021 ◽  
Author(s):  
Ayushi Singh ◽  
Amita Singh ◽  
Gabriele Kociok-Köhn ◽  
Kieran C Molloy ◽  
Ashish Kumar Singh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxygen Evolution ◽  
Carbon Nitride ◽  
Graphitic Carbon Nitride ◽  
Anionic Complex ◽  
Two Dimensional ◽  
Reduced Graphene ◽  
Two Dimensional Materials ◽  
Electrochemical Oxygen

In this report, the composites of anionic complex [NEt4][Ni(S2C2Ph2)2] with two-dimensional materials such as graphene oxide (GO), reduced graphene oxide (rGO) or graphitic carbon nitride (g-C3N4) have been prepared by...

scholarly journals Heavy metals removal by EDTA-functionalized chitosan graphene oxide nanocomposites

RSC Advances ◽  
2017 ◽  
Vol 7 (16) ◽  
pp. 9764-9771 ◽  
Author(s):  
Asif Shahzad ◽  
Waheed Miran ◽  
Kashif Rasool ◽  
Mohsin Nawaz ◽  
Jiseon Jang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Graphene Oxide ◽  
Two Dimensional ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Two Dimensional Materials

Graphene-based two-dimensional materials have been explored in a variety of applications, including the treatment of heavy-metal-rich water/wastewater.

scholarly journals Engineering Sub-Nanometer Channels in Two-Dimensional Materials for Membrane Gas Separation

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 100 ◽  
Author(s):  
Liang Huang ◽  
Haiqing Lin
Keyword(s):  
Graphene Oxide ◽  
Molybdenum Disulfide ◽  
Gas Separation ◽  
2D Materials ◽  
Two Dimensional ◽  
Membrane Gas Separation ◽  
Mixed Matrix ◽  
Molecular Separation ◽  
Two Dimensional Materials ◽  
2D Nanosheets

Sub-nanochannels constructed by stacking two-dimensional (2D) nanosheets in parallel provide a unique molecular separation pathway with excellent size-sieving ability for membrane gas separation. Herein we review the progress in engineering these 2D channels for efficient gas separation including graphene, graphene oxide (GO), molybdenum disulfide (MoS2), and MXene. Mixed matrix materials containing these 2D materials in polymers are also reviewed and compared with conventional polymers for gas separation.

Anisotropic Thermal Transport in Spray-Coated Single-Phase Two-Dimensional Materials: Synthetic Clay Versus Graphene Oxide

2020 ◽  
Vol 12 (16) ◽  
pp. 18785-18791 ◽  
Author(s):  
Alexandra Philipp ◽  
Patrick Hummel ◽  
Theresa Schilling ◽  
Patrick Feicht ◽  
Sabine Rosenfeldt ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Thermal Transport ◽  
Single Phase ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
Synthetic Clay

scholarly journals Infrared Polaritonic Biosensors Based on Two-Dimensional Materials

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4651
Author(s):  
Guangyu Du ◽  
Xiaozhi Bao ◽  
Shenghuang Lin ◽  
Huan Pang ◽  
Shivananju Bannur Nanjunda ◽  
...  
Keyword(s):  
Single Molecule ◽  
State Of The Art ◽  
2D Materials ◽  
Two Dimensional ◽  
Label Free ◽  
Low Loss ◽  
Healthcare Applications ◽  
Light Confinement ◽  
Two Dimensional Materials ◽  
Medical And Healthcare

In recent years, polaritons in two-dimensional (2D) materials have gained intensive research interests and significant progress due to their extraordinary properties of light-confinement, tunable carrier concentrations by gating and low loss absorption that leads to long polariton lifetimes. With additional advantages of biocompatibility, label-free, chemical identification of biomolecules through their vibrational fingerprints, graphene and related 2D materials can be adapted as excellent platforms for future polaritonic biosensor applications. Extreme spatial light confinement in 2D materials based polaritons supports atto-molar concentration or single molecule detection. In this article, we will review the state-of-the-art infrared polaritonic-based biosensors. We first discuss the concept of polaritons, then the biosensing properties of polaritons on various 2D materials, then lastly the impending applications and future opportunities of infrared polaritonic biosensors for medical and healthcare applications.

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