scholarly journals Enhancement of microwave absorption bandwidth of MXene nanocomposites through macroscopic design

2020 ◽  
Vol 7 (8) ◽  
pp. 200456 ◽  
Author(s):  
Pritom J. Bora ◽  
T. R. Suresh Kumar ◽  
Daniel Q. Tan
Keyword(s):  
Microwave Absorption ◽  
Polymer Nanocomposites ◽  
Reflection Loss ◽  
The Other ◽  
Two Dimensional ◽  
Absorption Bandwidth ◽  
Hybrid Matrix ◽  
New Family ◽  
Two Dimensional Materials ◽  
First Time

MXene, the new family of two-dimensional materials having numerous nanoscale layers, is being considered as a novel microwave absorption material. However, MXene/functionalized MXene-loaded polymer nanocomposites exhibit narrow reflection loss (RL) bandwidth (RL less than or equal to −10 dB). In order to enhance the microwave absorption bandwidth of MXene hybrid-matrix materials, for the first time, macroscopic design approach is carried out for TiO 2 -Ti 3 C 2 T x MXene and Fe 3 O 4 @TiO 2 -Ti 3 C 2 T x MXene hybrids through simulation. The simulated results indicate that use of pyramidal meta structure of MXene can significantly tune the RL bandwidth. For optimized MXene hybrid-matrix materials pyramid pattern, the bandwidth enhances to 3–18 GHz. Experimental RL value well matched with the simulated RL. On the other hand, the optimized Fe 3 O 4 @TiO 2 -Ti 3 C 2 T x hybrid exhibits two specific absorption bandwidths (minimum RL value - −47 dB). Compared with other two-dimensional nanocomposites such as graphene or Fe 3 O 4 -graphene, MXene hybrid-matrix materials show better microwave absorption bandwidth in macroscopic pattern.

Temperature dependence of the electromagnetic and microwave absorption properties of polyimide/Ti3SiC2 composites in the X band

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86656-86664 ◽  
Author(s):  
Hongyu Wang ◽  
Dongmei Zhu ◽  
Wancheng Zhou ◽  
Fa Luo
Keyword(s):  
Temperature Dependence ◽  
Microwave Absorption ◽  
Reflection Loss ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Absorption Bandwidth ◽  
X Band ◽  
Maximum Reflection Loss

The maximum reflection loss value of polyimide/Ti3SiC2 composites is up to −48.6 dB at 8.5 GHz with a thickness of 2.9 mm and the absorption bandwidth below −10 dB is 3.8 GHz.

New species of marine algae from California

1968 ◽  
Vol 46 (10) ◽  
pp. 1235-1251 ◽  
Author(s):  
George J. Hollenberg ◽  
Isabella A. Abbott
Keyword(s):  
New Species ◽  
New Taxa ◽  
Red Algae ◽  
Marine Algae ◽  
The Other ◽  
New Family ◽  
New Varieties ◽  
First Time

Eleven new taxa are described from California; two species, in addition, have new varieties added to them; and two species are given new circumscriptions to include a number of entities previously known under other names. New species are described in Percursaria (Chlorophyta), in Feldmannia (Phaeophyta), and in eight genera (Membranella, Porphyra, Rhododiscus, Peyssonelia, Prionitis, Blinksia, Besa and Rhodoglossum) of Rhodophyta. Two monotypic genera of Rhodophyta are described for the first time. One, Membranella nitens, is added to the Bangiales, and the other, Blinksia californica, is the type for a new family, the Blinksiaceae (Gigartinales). Half of the species of red algae are crustose non-corallinaceous species.

25th Anniversary Article: MXenes: A New Family of Two-Dimensional Materials

2013 ◽  
Vol 26 (7) ◽  
pp. 992-1005 ◽  
Author(s):  
Michael Naguib ◽  
Vadym N. Mochalin ◽  
Michel W. Barsoum ◽  
Yury Gogotsi
Keyword(s):  
Two Dimensional ◽  
25Th Anniversary ◽  
New Family ◽  
Two Dimensional Materials

Two-dimensional materials and one-dimensional carbon nanotube composites for microwave absorption

2017 ◽  
Vol 29 (2) ◽  
pp. 025704 ◽  
Author(s):  
Congpu Mu ◽  
Jiefang Song ◽  
Bochong Wang ◽  
Can Zhang ◽  
Jianyong Xiang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Microwave Absorption ◽  
Two Dimensional ◽  
One Dimensional ◽  
Two Dimensional Materials ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

ChemInform Abstract: 25th Anniversary Article: MXenes: A New Family of Two-Dimensional Materials

ChemInform ◽  
2014 ◽  
Vol 45 (17) ◽  
pp. no-no ◽  
Author(s):  
Michael Naguib ◽  
Vadym N. Mochalin ◽  
Michel W. Barsoum ◽  
Yury Gogotsi
Keyword(s):  
Two Dimensional ◽  
25Th Anniversary ◽  
New Family ◽  
Two Dimensional Materials

scholarly journals Structural, microstructural, magnetic and electromagnetic absorption properties of spiraled multiwalled carbon nanotubes/barium hexaferrite (MWCNTs/BaFe12O19) hybrid

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nurshahiera Rosdi ◽  
Raba’ah Syahidah Azis ◽  
Ismayadi Ismail ◽  
Nurhidayaty Mokhtar ◽  
Muhammad Misbah Muhammad Zulkimi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Multiwalled Carbon Nanotubes ◽  
Reflection Loss ◽  
Barium Hexaferrite ◽  
High Energy ◽  
Absorption Properties ◽  
Multiwalled Carbon ◽  
Absorption Bandwidth ◽  
Minimum Reflection Loss

AbstractMicrowave absorption properties were systematically studied for synthesised barium hexaferrite (BaFe12O19) nanoparticles and spiraled multiwalled carbon nanotubes (MWCNTs) hybrid. BaFe12O19 nanoparticles were synthesised by a high energy ball milling (HEBM) followed by sintering at 1400 °C and structural, electromagnetic and microwave characteristics have been scrutinized thoroughly. The sintered powders were then used as a catalyst to synthesise spiraled MWCNTs/BaFe12O19 hybrid via the chemical vapour deposition (CVD) process. The materials were then incorporated into epoxy resin to fabricate single-layer composite structures with a thickness of 2 mm. The composite of BaFe12O19 nanoparticles showed a minimum reflection loss is − 3.58 dB and no has an absorption bandwidth while the spiraled MWCNTs/BaFe12O19 hybrid showed the highest microwave absorption of more than 99.9%, with a minimum reflection loss of − 43.99 dB and an absorption bandwidth of 2.56 GHz. This indicates that spiraled MWCNTs/BaFe12O19 hybrid is a potential microwave absorber for microwave applications in X and Ku bands.

scholarly journals MXene: Evolutions in Chemical Synthesis and Recent Advances in Applications

Surfaces ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 1-36
Author(s):  
Sayani Biswas ◽  
Prashant S. Alegaonkar
Keyword(s):  
Chemical Synthesis ◽  
Material Science ◽  
Synthesis Methods ◽  
Two Dimensional ◽  
Review Of The Literature ◽  
New Family ◽  
New Synthesis ◽  
Two Dimensional Materials ◽  
Good Characterization

Two-dimensional materials have secured a novel area of research in material science after the emergence of graphene. Now, a new family of 2D material-MXene is gradually growing and making itsmark in this field of study. MXenes since 2011 have been synthesized and experimented on in several ways.The HF treatment although successful poses some serious problems that gradually propelled the ideas of new synthesis methods. This review of the literature covers the major breakthroughs of MXene from the year of its discovery to recent endeavors, highlighting how the synthesis mechanisms have been developed over the years and also the importance of good characterization of data. Results and properties of this class of materials arealso briefly discussed alongwith recent advance in applications.

Hollow porous Fe2O3 microspheres wrapped by reduced graphene oxides with high-performance microwave absorption

2019 ◽  
Vol 7 (36) ◽  
pp. 11167-11176 ◽  
Author(s):  
Lei Wang ◽  
Jie Zhang ◽  
Min Wang ◽  
Renchao Che
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
High Performance ◽  
Graphene Oxides ◽  
Absorption Bandwidth ◽  
Effective Absorption ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides

Hollow porous Fe2O3 microspheres wrapped by thin RGO sheets exhibited high-performance microwave absorption with a reflection loss value of −48.1 dB and an effective absorption bandwidth cover of 5.28 GHz.

Sign in / Sign up

Export Citation Format

Share Document