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Search for "nanosheets" in Full Text gives 145 result(s) in Beilstein Journal of Nanotechnology.

ZnO and MXenes as electrode materials for supercapacitor devices

  • Ameen Uddin Ammar,
  • Ipek Deniz Yildirim,
  • Feray Bakan and
  • Emre Erdem

Beilstein J. Nanotechnol. 2021, 12, 49–57, doi:10.3762/bjnano.12.4

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  • multiple chemical processes. Because the number of active sites is increased, a faster ionic transport is observed. Also, a specific capacitance of 260 F·g−1 was measured [21]. Jiang et al. developed a layered Co(OH)2/Ti3C2Tx composite material via growing Co(OH)2 nanosheets onto Ti3C2Tx MXene. The total
  • specific capacitance of the resultant composites was twice as high as that of Co(OH)2 nanosheets [17]. Liu et al. synthesized a MXene/nickel sulfide (NiS) nanocomposite using a basic hydrothermal technique and measured a specific capacitance of 857.8 F·g−1. NiS has advantages such as good conductivity and
  • increased capacitance of 226 F·g−1 at 1 A·g-1 [22]. Xia et al. used a Ti3C2Tx MXene electrode decorated with nickel oxide (NiO) nanosheets. The electrode was synthesized via a hydrothermal method. The electrode used in a supercapacitor showed an excellent specific capacitance of 80 F·g−1 and an energy
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Published 13 Jan 2021

Self-standing heterostructured NiCx-NiFe-NC/biochar as a highly efficient cathode for lithium–oxygen batteries

  • Shengyu Jing,
  • Xu Gong,
  • Shan Ji,
  • Linhui Jia,
  • Bruno G. Pollet,
  • Sheng Yan and
  • Huagen Liang

Beilstein J. Nanotechnol. 2020, 11, 1809–1821, doi:10.3762/bjnano.11.163

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  • lithium–oxygen batteries. It significantly reduced the overpotential and exhibited high efficiency towards ORR and OER [27]. Mu et al. reported that 2D niobium carbide (NbC) nanosheets exhibited enhanced catalytic activity and durability towards ORR [28]. Although progress has been made in the development
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Published 02 Dec 2020

One-step synthesis of carbon-supported electrocatalysts

  • Sebastian Tigges,
  • Nicolas Wöhrl,
  • Ivan Radev,
  • Ulrich Hagemann,
  • Markus Heidelmann,
  • Thai Binh Nguyen,
  • Stanislav Gorelkov,
  • Stephan Schulz and
  • Axel Lorke

Beilstein J. Nanotechnol. 2020, 11, 1419–1431, doi:10.3762/bjnano.11.126

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  • the C-matrix and the Pt-NPs during the process. The carbon support consists of carbon nanowalls (CNWs), which are vertically aligned, multilayer graphene nanosheets [18][19]. The morphology of the CNWs, the amount of platinum loading as well as the size of the platinum NPs can be precisely adjusted
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Published 17 Sep 2020

Photothermally active nanoparticles as a promising tool for eliminating bacteria and biofilms

  • Mykola Borzenkov,
  • Piersandro Pallavicini,
  • Angelo Taglietti,
  • Laura D’Alfonso,
  • Maddalena Collini and
  • Giuseppe Chirico

Beilstein J. Nanotechnol. 2020, 11, 1134–1146, doi:10.3762/bjnano.11.98

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  • nanohole arrays with reduced graphene oxide nanosheets in a unique and flexible polyimide film for laser-gated pathogen inactivation. For the in vivo experiments, the patch was irradiated for 5 min with an LED array (940 nm, 10 W) and the patch surface temperature increased to 52 °C. These tests indicated
  • engineered to combat bacterial infections by integrating bacterial conjugation and NIR-triggered photothermal sterilization [97]. In a very recent publication, polyethylene glycol (PEG)-MoS2 nanosheets additionally functionalized with an antibody (anti-protein A lgG) and polydopamine were applied to induce
  • plasmonic MoO3−x nanosheets were designed to be a highly efficient NIR-driven antibacterial agent [100]. This approach enhanced the nanocube antibacterial activity towards E. coli and S. aureus upon NIR light irradiation due to the local temperature increase, release of silver ions and bacterial membrane
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Published 31 Jul 2020

Microwave-induced electric discharges on metal particles for the synthesis of inorganic nanomaterials under solvent-free conditions

  • Vijay Tripathi,
  • Harit Kumar,
  • Anubhav Agarwal and
  • Leela S. Panchakarla

Beilstein J. Nanotechnol. 2020, 11, 1019–1025, doi:10.3762/bjnano.11.86

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  • . We have also seen a partial rolling of graphene sheets into nanoscrolls (Figure 5a,b). The formation of ultrasmall nanoparticles of ZnO along with graphene was detected (see Figure S8 in Supporting Information File 1). In the case of GO exfoliation, we have observed the formation of nanosheets of
  • reduced graphite oxide (Figure 5c). These nanosheets still keep hexagonal structure under microwave irradiation as can be seen from the selected area electron diffraction pattern in Figure 5d. Conclusion We have shown that microwave-induced electric discharges on rough metallic surfaces can be effectively
  • -C3N4 (50 mg) is placed in a Teflon beaker and irradiated with microwaves. The products are collected from the lid of the reaction vessel. The above experiments are performed in air. Preparation of few-layer graphene and graphite oxide nanosheets In a typical experiment, 50 mg of acid-treated Zn metal
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Published 13 Jul 2020

Light–matter interactions in two-dimensional layered WSe2 for gauging evolution of phonon dynamics

  • Avra S. Bandyopadhyay,
  • Chandan Biswas and
  • Anupama B. Kaul

Beilstein J. Nanotechnol. 2020, 11, 782–797, doi:10.3762/bjnano.11.63

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  • work reported τ over a range T = 4.4–300 K in naturally abundant and isotopically pure WSe2 grown by the chemical vapor deposition (CVD) method [29]. In one of our recent works, exciton dynamics and phonon lifetimes in CVD-grown and mechanically exfoliated 1L WSe2 nanosheets were analyzed and τ
  • increasing temperature, which is directly related to the phonon damping mechanisms. Finally, we propose a mechanical model to help explain the effect of damping or the rate of decrease of τ as a function of T for quantum-confined 1L, as well as ML and bulk WSe2. Experimental WSe2 nanosheets, including all 1L
  • nanosheets were viewed, and the data were collected using a 10× objective (NA = 0.25) of the Raman microscope with working distance 10.6 mm. Due to the instrument limitation, the 10× objective lens could only be used for the temperature-dependent measurement and hence the 10× objective lens was used to
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Published 12 May 2020

Exfoliation in a low boiling point solvent and electrochemical applications of MoO3

  • Matangi Sricharan,
  • Bikesh Gupta,
  • Sreejesh Moolayadukkam and
  • H. S. S. Ramakrishna Matte

Beilstein J. Nanotechnol. 2020, 11, 662–670, doi:10.3762/bjnano.11.52

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  • of the dispersion is about 0.57 mg·mL−1 with a yield of 5.7%, which are the highest values reported to date. These high values of concentration and yield can be attributed to a favorable matching of energies involved in exfoliation and stabilization of MoO3 nanosheets in 2-butanone. Interestingly
  • , the MoO3 dispersion in 2-butanone retains its intrinsic nature even after exposure to sunlight for 24 h. The composites of MoO3 nanosheets were used as an electrode material for supercapacitors and showed a high specific capacitance of 201 F·g−1 in a three-electrode configuration at a scan rate of 50
  • favorable matching of the exfoliation and stabilization energies between the solvent and the MoO3 nanosheets. It has been theoretically reported that apart from the matching of HSP values, factors such as the structure of the solvent, its bulkiness and its re-orientation on the exfoliated nanosheets are
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Published 17 Apr 2020

Multilayer capsules made of weak polyelectrolytes: a review on the preparation, functionalization and applications in drug delivery

  • Varsha Sharma and
  • Anandhakumar Sundaramurthy

Beilstein J. Nanotechnol. 2020, 11, 508–532, doi:10.3762/bjnano.11.41

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  • CNTs ruptured upon laser light irradiation [115]. The introduction of graphene oxide (GO) nanosheets with PDDA as multilayers caused the migration and rearrangement of chains compared to PDDA/PAA multilayers [116]. The PDDA/GO multilayers showed improved resistance to damage and maintained a defect
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Published 27 Mar 2020

Electrochemically derived functionalized graphene for bulk production of hydrogen peroxide

  • Munaiah Yeddala,
  • Pallavi Thakur,
  • Anugraha A and
  • Tharangattu N. Narayanan

Beilstein J. Nanotechnol. 2020, 11, 432–442, doi:10.3762/bjnano.11.34

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  • Supporting Information File 1) and scanning electron microscopy (SEM) images indicate the formation of randomly oriented exfoliated graphene nanosheets [43]. However, the TEM images show that the thickness of the graphene increases from G-M1 to G-M4, where the G-M4 is found to block the electron beam despite
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Published 09 Mar 2020

Molecular architectonics of DNA for functional nanoarchitectures

  • Debasis Ghosh,
  • Lakshmi P. Datta and
  • Thimmaiah Govindaraju

Beilstein J. Nanotechnol. 2020, 11, 124–140, doi:10.3762/bjnano.11.11

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  • a mutually templated assembly with oligothymidine (dTn, n = 6, 10, 20, Figure 5a). The BNAn–dTn coassembly led to the formation of 2D nanosheets of variable dimensions depending on the dTn chain length (Figure 5b). Oligothymidine (dTn) mutually templated with BNA was used for the first time to
  • excellent transport properties of individual BNAn–dTn nanoarchitectures (nanosheets), which also provided highly sensitive detection of mercury. The displacement of BNA in BNAn–dTn by Hg(II) resulted in a change of morphology of the nanoarchitectures from nanosheets to 1D tapes. This unique strategy
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Published 09 Jan 2020

Simple synthesis of nanosheets of rGO and nitrogenated rGO

  • Pallellappa Chithaiah,
  • Madhan Mohan Raju,
  • Giridhar U. Kulkarni and
  • C. N. R. Rao

Beilstein J. Nanotechnol. 2020, 11, 68–75, doi:10.3762/bjnano.11.7

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  • , 560064, India 10.3762/bjnano.11.7 Abstract A green and facile approach has been developed for the large-scale synthesis of nanosheets of reduced graphene oxide (rGO) and nitrogenated reduced graphene oxide (N-rGO). This has been achieved by direct thermal decomposition of sucrose and glycine at 475 °C
  • hydrogen treated (H-rGO) samples. Keywords: nanosheets; nitrogenated reduced graphene oxide (N-rGO); reduced graphene oxide (rGO); supercapacitors; thermal decomposition; Introduction Graphene, the one atom thick two-dimensional material of sp2-hybridized carbon atoms has attracted much attention after
  • . Therefore, searching for a new synthetic approach to obtain pure phases of rGO is a highly desirable and great challenge for materials chemists. Herein, we report for the first time a generic and rapid method for the synthesis of rGO nanosheets by direct thermal decomposition of sugar, without the use of
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Published 07 Jan 2020

Advanced hybrid nanomaterials

  • Andreas Taubert,
  • Fabrice Leroux,
  • Pierre Rabu and
  • Verónica de Zea Bermudez

Beilstein J. Nanotechnol. 2019, 10, 2563–2567, doi:10.3762/bjnano.10.247

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  • hydrophobicity and lipophilicity. Exfoliated nanosheets of layered calcium phenylphosphonate assisted by solvent were used in “Layered calcium phenylphosphonate: a hybrid material for a new generation of nanofillers” to promote the mechanical properties and improve the barrier effect for applications such as
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Published 20 Dec 2019

Synthesis and acetone sensing properties of ZnFe2O4/rGO gas sensors

  • Kaidi Wu,
  • Yifan Luo,
  • Ying Li and
  • Chao Zhang

Beilstein J. Nanotechnol. 2019, 10, 2516–2526, doi:10.3762/bjnano.10.242

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  • ZnFe2O4. In addition, the results of field-emission scanning electron microscopy and (high-resolution) transmission electron microscopy indicated that the synthesized samples had the structure of hollow spheres distributed uniformly onto rGO nanosheets. The diameters of the spheres were determined as
  • nanosheets. Furthermore, as shown in Figure 3, there is almost no change in the diameter of the ZnFe2O4/rGO composites when the rGO content is increased from 0 to 1 wt %. However, Figure 3d, Figure 3f, Figure 3h and Figure 3j show that when the rGO content exceeds 0.25 wt %, there are more ZnFe2O4 spheres
  • which are composed of small nanoparticles instead of nanosheets. This deformation of the self-assembled structure of the nanosheets may be ascribed to the introduction of more water to the organic solvent when increasing the volume of the aqueous GO dispersion [37][38] or to the low mass fraction of rGO
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Published 16 Dec 2019

Design and facile synthesis of defect-rich C-MoS2/rGO nanosheets for enhanced lithium–sulfur battery performance

  • Chengxiang Tian,
  • Juwei Wu,
  • Zheng Ma,
  • Bo Li,
  • Pengcheng Li,
  • Xiaotao Zu and
  • Xia Xiang

Beilstein J. Nanotechnol. 2019, 10, 2251–2260, doi:10.3762/bjnano.10.217

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  • composite with both large surface area and high porosity for the use as advanced electrode material in lithium–sulfur batteries. Double modified defect-rich MoS2 nanosheets are successfully prepared by introducing reduced graphene oxide (rGO) and amorphous carbon. The conductibility of the cathodes can be
  • specific capacity of 572 mAh·g−1 at 0.2C after 550 cycles, and 551 mAh·g−1 even at 2C, much better than that of MoS2-S nanosheets (249 mAh·g−1 and 149 mAh·g−1) and C-MoS2/rGO-S composites (334 mAh·g−1 and 382 mAh·g−1). Our intended electrode design protocol and annealing process may pave the way for the
  • materials, can provide good performance at low cost [18][19][20]. In particular, MoS2 has attracted the most attention owing to the high electrochemical activity associated with the sulfur deficiencies [5]. It has been reported that MoS2 nanosheets show great performance in the hydrodesulphurization process
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Published 14 Nov 2019

A novel all-fiber-based LiFePO4/Li4Ti5O12 battery with self-standing nanofiber membrane electrodes

  • Li-li Chen,
  • Hua Yang,
  • Mao-xiang Jing,
  • Chong Han,
  • Fei Chen,
  • Xin-yu Hu,
  • Wei-yong Yuan,
  • Shan-shan Yao and
  • Xiang-qian Shen

Beilstein J. Nanotechnol. 2019, 10, 2229–2237, doi:10.3762/bjnano.10.215

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  • . Nanostructures of various shapes such as nanofibers [27][28], nanoparticles [29], nanotubes [30], nanowires [31], and nanosheets [32] can greatly shorten the conduction path of Li+, thus improving the Li+ conductivity. In addition, coating or blending with conductive carbon can significantly increase the
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Published 13 Nov 2019

Ultrathin Ni1−xCoxS2 nanoflakes as high energy density electrode materials for asymmetric supercapacitors

  • Xiaoxiang Wang,
  • Teng Wang,
  • Rusen Zhou,
  • Lijuan Fan,
  • Shengli Zhang,
  • Feng Yu,
  • Tuquabo Tesfamichael,
  • Liwei Su and
  • Hongxia Wang

Beilstein J. Nanotechnol. 2019, 10, 2207–2216, doi:10.3762/bjnano.10.213

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  • is composed of interconnected nanoflakes (Figure 1b) with plenty of linked and wrinkled nanosheets (Figure 1c) can be observed. The TEM images of the Ni1−xCoxS2 nanosheets (Figure 1d–g) show a highly folded and contorted morphology, indicative of the ultrathin nature of these nanoflakes. The
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Published 11 Nov 2019

Improvement of the thermoelectric properties of a MoO3 monolayer through oxygen vacancies

  • Wenwen Zheng,
  • Wei Cao,
  • Ziyu Wang,
  • Huixiong Deng,
  • Jing Shi and
  • Rui Xiong

Beilstein J. Nanotechnol. 2019, 10, 2031–2038, doi:10.3762/bjnano.10.199

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  • materials show a better thermoelectric performance than bulk materials [14]. Few-layer MoO3 nanosheets have already been experimentally synthesized by exfoliation similar to graphene [12][13][15][16]. Theoretical research has proved that few-layer MoO3 possesses a markedly high carrier mobility above 3000
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Published 25 Oct 2019

Review of advanced sensor devices employing nanoarchitectonics concepts

  • Katsuhiko Ariga,
  • Tatsuyuki Makita,
  • Masato Ito,
  • Taizo Mori,
  • Shun Watanabe and
  • Jun Takeya

Beilstein J. Nanotechnol. 2019, 10, 2014–2030, doi:10.3762/bjnano.10.198

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  • composite of Co3O4 nanoparticles in black phosphorous thin films [86]. The composite structures were engineered by functionalization of black phosphorous nanosheets with branched polyethylenimine to which Co3O4 nanoparticles were included with a hydrothermal process. The sensor composite structures showed
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Published 16 Oct 2019

First principles modeling of pure black phosphorus devices under pressure

  • Ximing Rong,
  • Zhizhou Yu,
  • Zewen Wu,
  • Junjun Li,
  • Bin Wang and
  • Yin Wang

Beilstein J. Nanotechnol. 2019, 10, 1943–1951, doi:10.3762/bjnano.10.190

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  • transition under axial strain [5][32]. The sensitivity to and the resilience against strain make BP an ideal material for strain-sensing electronics and flexible electronic devices. Xiao et al. fabricated few-layer BP nanosheets by chemical vapor transport [25], and observed a phase transition from an
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Published 24 Sep 2019

Biocatalytic oligomerization-induced self-assembly of crystalline cellulose oligomers into nanoribbon networks assisted by organic solvents

  • Yuuki Hata,
  • Yuka Fukaya,
  • Toshiki Sawada,
  • Masahito Nishiura and
  • Takeshi Serizawa

Beilstein J. Nanotechnol. 2019, 10, 1778–1788, doi:10.3762/bjnano.10.173

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  • solution. The addition of appropriate organic solvents to the oligomerization system was found to result in well-grown nanoribbon networks. The organic solvents appeared to prevent irregular aggregation and subsequent precipitation of the nanosheets via solvation for further growth into the well-grown
  • ], distorted nanosheets with a bilayer structure [35], helical nanorods with a bilayer structure [35], and network structures composed of nanoribbon-shaped lamellar crystals [33][42][43][44][45][46] have been successfully constructed by changing the enzymatic reactions, tuning the self-assembly kinetics
  • oligomerization-induced self-assembly assisted by organic solvents, which are widely used typical small molecules. The CDP-catalyzed oligomerization from ᴅ-glucose primers, which is known to produce rectangular nanosheets as precipitates in aqueous solution (Figure 1) [30][31], was used in this study. The
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Published 26 Aug 2019

Remarkable electronic and optical anisotropy of layered 1T’-WTe2 2D materials

  • Qiankun Zhang,
  • Rongjie Zhang,
  • Jiancui Chen,
  • Wanfu Shen,
  • Chunhua An,
  • Xiaodong Hu,
  • Mingli Dong,
  • Jing Liu and
  • Lianqing Zhu

Beilstein J. Nanotechnol. 2019, 10, 1745–1753, doi:10.3762/bjnano.10.170

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  • parameters to be a ≈ 3.49 Å and b ≈ 6.32 Å, respectively, which are in excellent agreement with a previous report [28]. In order to gain further information on the crystal structure, Raman spectroscopy was performed on 1T’-WTe2 nanosheets, as shown Figure 1d. All of the peak positions are consistent with
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Published 20 Aug 2019

TiO2/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries

  • Ning Liu,
  • Lu Wang,
  • Taizhe Tan,
  • Yan Zhao and
  • Yongguang Zhang

Beilstein J. Nanotechnol. 2019, 10, 1726–1736, doi:10.3762/bjnano.10.168

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  • nanoporous TiO2 has been completely wrapped by wrinkled GO nanosheets (Figure 3d and 3e). As displayed in the high-resolution TEM (HRTEM) images (Figure 3f and 3g), the TiO2/GO composite reveals no clear lattice fringe for TiO2, indicating poor crystallinity. It is clear that the GO sheets have a flake-like
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Published 19 Aug 2019

Graphynes: an alternative lightweight solution for shock protection

  • Kang Xia,
  • Haifei Zhan,
  • Aimin Ji,
  • Jianli Shao,
  • Yuantong Gu and
  • Zhiyong Li

Beilstein J. Nanotechnol. 2019, 10, 1588–1595, doi:10.3762/bjnano.10.154

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  • monolayer GY nanosheets of different morphologies, including α-GY, β-GY, γ-GY and 6612-GY, under supersonic-velocity impacts (from 1 to 6 km/s) based on in silico studies. Generally, cracks initiate at the geometry center and the nanosheet experiences significant out-of-plane deformation before the
  • propagation of cracks. Tracking the atomic von Mises stress distribution, it is found that its cumulative density function has a strong correlation with the magnitude of the Young’s modulus of the GYs. For nanosheets with a higher Young’s modulus, it tends to transfer momentum at a faster rate. Thus, a better
  • energy dissipation or delocalization is expected during impact. This study provides a fundamental understanding of the deformation and penetration mechanisms of monolayer GY nanosheets under impact, which is crucial in order to facilitate their emerging applications for impact protection. Keywords
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Published 31 Jul 2019

Materials nanoarchitectonics at two-dimensional liquid interfaces

  • Katsuhiko Ariga,
  • Michio Matsumoto,
  • Taizo Mori and
  • Lok Kumar Shrestha

Beilstein J. Nanotechnol. 2019, 10, 1559–1587, doi:10.3762/bjnano.10.153

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  • –Blodgett method, liquid–liquid interfacial precipitation, instructed assembly, and layer-by-layer assembly to give low-dimensional materials including nanowires, nanowhiskers, nanosheets, cubic objects, molecular patterns, supramolecular polymers, metal-organic frameworks and covalent organic frameworks
  • perturbations such as microwave and plasma irradiation [45][46][47][48][49][50][51]. Carbon nanotubes, representative one-dimensional objects, were produced using catalysts as well [52][53][54][55]. Recently, two-dimensional materials such as graphene and MoS2 nanosheets attracted the interests of researchers
  • because of their superior electric/electrochemical properties that make them suitable for energy and electrochemical applications [56][57][58][59][60]. The works include the use of two-dimensional metal oxide nanosheets for artificial photosynthesis systems, i.e., photocatalytic water splitting and
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Published 30 Jul 2019

Direct observation of oxygen-vacancy formation and structural changes in Bi2WO6 nanoflakes induced by electron irradiation

  • Hong-long Shi,
  • Bin Zou,
  • Zi-an Li,
  • Min-ting Luo and
  • Wen-zhong Wang

Beilstein J. Nanotechnol. 2019, 10, 1434–1442, doi:10.3762/bjnano.10.141

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  • of high-resolution TEM (HRTEM) imaging and electron diffraction experiments was performed to investigate the electron-induced defects in the Bi2WO6 nanoflakes. Our results reveal that Bi2WO6 nanoflakes can be decomposed into Bi precipitates and WO3 nanosheets after the generation of oxygen vacancies
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Published 18 Jul 2019
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