npj 2D Materials and Applications最新文献_第9页

Hard ferromagnetism in van der Waals Fe3GaTe2 nanoflake down to monolayer 范德瓦尔斯 Fe3GaTe2 纳米薄片单层的硬铁磁性

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-03-18 DOI: 10.1038/s41699-024-00460-1

Mingjie Wang, Bin Lei, Kejia Zhu, Yazhou Deng, Mingliang Tian, Ziji Xiang, Tao Wu, Xianhui Chen

{"title":"Hard ferromagnetism in van der Waals Fe3GaTe2 nanoflake down to monolayer","authors":"Mingjie Wang, Bin Lei, Kejia Zhu, Yazhou Deng, Mingliang Tian, Ziji Xiang, Tao Wu, Xianhui Chen","doi":"10.1038/s41699-024-00460-1","DOIUrl":"10.1038/s41699-024-00460-1","url":null,"abstract":"Two-dimensional (2D) magnetic materials are of not only fundamental scientific interest but also promising candidates for numerous applications. However, so far only a few intrinsic magnets with long-ranged order down to the 2D limit have been experimentally established. Here, we report that the intrinsic 2D ferromagnetism can be realized in van der Waals (vdW) Fe3GaTe2 nanoflake down to monolayer. By measuring the Hall resistance and magnetoresistance, we demonstrate that the Fe3GaTe2 monolayer exhibits 2D hard ferromagnetism with record-high Cure temperature (Tc) of 240 K for the monolayer of known intrinsic ferromagnets. Both of square-shaped hysteresis loops with near-vertical jump in anomalous Hall effect (AHE) and the negative magnetoresistance (NMR) behavior with an applied out-of-plane magnetic field reveal robust perpendicular magnetic anisotropy (PMA) in Fe3GaTe2 nanoflakes down to the monolayer limit. Furthermore, we find the intrinsic mechanism that stems from the Berry curvature of electronic bands dominates AHE of nanoflakes in the low temperature range. Our results not only provide an excellent candidate material for next-generation spintronic applications, but also open up a platform for exploring physical mechanisms in 2D ferromagnetism.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-7"},"PeriodicalIF":9.7,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00460-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140167290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bio-inspired “Self-denoising” capability of 2D materials incorporated optoelectronic synaptic array 融入光电突触阵列的二维材料的生物启发 "自变型 "能力

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-03-14 DOI: 10.1038/s41699-024-00458-9

Molla Manjurul Islam, Md Sazzadur Rahman, Haley Heldmyer, Sang Sub Han, Yeonwoong Jung, Tania Roy

{"title":"Bio-inspired “Self-denoising” capability of 2D materials incorporated optoelectronic synaptic array","authors":"Molla Manjurul Islam, Md Sazzadur Rahman, Haley Heldmyer, Sang Sub Han, Yeonwoong Jung, Tania Roy","doi":"10.1038/s41699-024-00458-9","DOIUrl":"10.1038/s41699-024-00458-9","url":null,"abstract":"In in-sensor image preprocessing, the sensed image undergoes low level processing like denoising at the sensor end, similar to the retina of human eye. Optoelectronic synapse devices are potential contenders for this purpose, and subsequent applications in artificial neural networks (ANNs). The optoelectronic synapses can offer image pre-processing functionalities at the pixel itself—termed as in-pixel computing. Denoising is an important problem in image preprocessing and several approaches have been used to denoise the input images. While most of those approaches require external circuitry, others are efficient only when the noisy pixels have significantly lower intensity compared to the actual pattern pixels. In this work, we present the innate ability of an optoelectronic synapse array to perform denoising at the pixel itself once it is trained to memorize an image. The synapses consist of phototransistors with bilayer MoS2 channel and p-Si/PtTe2 buried gate electrode. Our 7 × 7 array shows excellent robustness to noise due to the interplay between long-term potentiation and short-term potentiation. This bio-inspired strategy enables denoising of noise with higher intensity than the memorized pattern, without the use of any external circuitry. Specifically, due to the ability of these synapses to respond distinctively to wavelengths from 300 nm in ultraviolet to 2 µm in infrared, the pixel array also denoises mixed-color interferences. The “self-denoising” capability of such an artificial visual array has the capacity to eliminate the need for raw data transmission and thus, reduce subsequent image processing steps for supervised learning.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-10"},"PeriodicalIF":9.7,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00458-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140123818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MoS2 decorated carbon fiber yarn hybrids for the development of freestanding flexible supercapacitors 用于开发独立式柔性超级电容器的 MoS2 装饰碳纤维纱混合物

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-03-12 DOI: 10.1038/s41699-024-00448-x

José Tiago Carvalho, Afonso Correia, Neusmar J. A. Cordeiro, João Coelho, Sidney A. Lourenço, Elvira Fortunato, Rodrigo Martins, Luís Pereira

{"title":"MoS2 decorated carbon fiber yarn hybrids for the development of freestanding flexible supercapacitors","authors":"José Tiago Carvalho, Afonso Correia, Neusmar J. A. Cordeiro, João Coelho, Sidney A. Lourenço, Elvira Fortunato, Rodrigo Martins, Luís Pereira","doi":"10.1038/s41699-024-00448-x","DOIUrl":"10.1038/s41699-024-00448-x","url":null,"abstract":"Academic and industrial efforts have focused on developing energy storage devices for wearable and portable electronics using low-cost, scalable, and sustainable materials and approaches. In this work, commercially available stretch-broken carbon fiber yarns (SBCFYs) were hybridized with mixed phases of 1 T and 2H MoS2 nanosheets via conventional and microwave-assisted heating (CAH, MAH) without the use of binders to fabricate symmetric freestanding 1D fiber-shaped supercapacitors (FSCs). Electrochemical characterization performed in a three-electrode configuration showed promising results with specific capacitance values of 184.41 and 180.02 F·g−1, at 1 mV·s−1 for CAH and MAH, respectively. Furthermore, after performing 3000 CV cycles at 100 mV·s−1, the capacitance retention was 79.5% and 95.7%, respectively. Using these results as a reference, symmetric 1D FSCs were fabricated by pairing hybridized SBCFYs with MoS2 by MAH. The devices exhibited specific capacitances of approximately 58.60 ± 3.06 F·g−1 at 1 mV·s−1 and 54.81 ± 7.34 F·g−1 at 0.2 A·g−1 with the highest power density achieved being 15.17 W·g−1 and energy density of 5.06×10–4 Wh·g−1. In addition, five 1D FSCs were hand-stitched and connected in series onto a cotton fabric. These supercapacitors could power a temperature and humidity sensor for up to six minutes, demonstrating the practicality and versatility of the prepared 1D FSCs for powering future electronic systems.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-9"},"PeriodicalIF":9.7,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00448-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave graphitic nitrogen/boron ultradoping of graphene 微波石墨氮/硼超掺杂石墨烯

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-03-08 DOI: 10.1038/s41699-024-00457-w

Rebti Bhushan, Arkamita Bandyopadhyay, Sangeeth Kallatt, Awalendra K. Thakur, Swapan K. Pati, Prashant Kumar

{"title":"Microwave graphitic nitrogen/boron ultradoping of graphene","authors":"Rebti Bhushan, Arkamita Bandyopadhyay, Sangeeth Kallatt, Awalendra K. Thakur, Swapan K. Pati, Prashant Kumar","doi":"10.1038/s41699-024-00457-w","DOIUrl":"10.1038/s41699-024-00457-w","url":null,"abstract":"Insufficient carrier concentration and lack of room temperature ferromagnetism in pristine graphene limit its dream applications in electronic and spintronic chips. While theoretical calculations have revealed that graphitic ultradoping can turn graphene into semiconducting and room temperature ferromagnetic, the exotic set of thermodynamic conditions needed for doping result in defects and functionalities in graphene which end up giving significant electronic scattering. We report our discovery of microwave ultradoping of graphene with N > 30%, B ~ 19%, and co-doping to form BCN phases (B5C73N22, B8C76N16, and B10C77N13). An unprecedented level of graphitic doping ~95% enhances carrier concentration up to ~9.2 × 1012 cm−2, keeping high electronic mobility ~9688 cm2 V−1s−1 intact, demonstrated by field effect transistor measurements. Room temperature ferromagnetic character with magnetization ~4.18 emug−1 is reported and is consistent with our DFT band structure calculations. This breakthrough research on tunable graphitic ultradoping of 2D materials opens new avenues for emerging multi-functional technological applications.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-11"},"PeriodicalIF":9.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00457-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140066618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly sensitive and reversible MXene-based micro quartz tuning fork gas sensors with tunable selectivity 具有可调选择性的高灵敏度和可逆的基于 MXene 的微型石英音叉气体传感器

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-03-06 DOI: 10.1038/s41699-024-00452-1

Wei Ding, Jingjing Yu, Francis Tsow, Laxmi Raj Jaishi, Buddhi Sagar Lamsal, Rick Kittelson, Sarwar Ahmed, Parashu Kharel, Yue Zhou, Xiaojun Xian

{"title":"Highly sensitive and reversible MXene-based micro quartz tuning fork gas sensors with tunable selectivity","authors":"Wei Ding, Jingjing Yu, Francis Tsow, Laxmi Raj Jaishi, Buddhi Sagar Lamsal, Rick Kittelson, Sarwar Ahmed, Parashu Kharel, Yue Zhou, Xiaojun Xian","doi":"10.1038/s41699-024-00452-1","DOIUrl":"10.1038/s41699-024-00452-1","url":null,"abstract":"Due to their distinctive morphology, significant surface-to-volume ratio, and metal-like electrical conductivity, MXenes have emerged as highly promising gas-sensing materials. Traditional MXene-based gas sensors predominantly rely on the electrical conductivity of MXenes for signal transduction. However, it is crucial to explore alternative signal transduction mechanisms to fully unlock the potential of MXenes in gas sensing applications. In this study, we have successfully showcased the development of a mass-transduction-based MXene gas sensor, utilizing MXenes as the adaptable receptor and MQTF as the transducer. The interaction between the gas analyte and MXenes induces a change in mass, resulting in a resonant frequency shift of the MQTF. This signal transduction mechanism eliminates the dependency on the electrical conductivity of MXenes, offering a broader range of possibilities for chemical modification of MXenes without concerns about compromising their conductivity. By engineering Ti3C2Tx surfaces, we have demonstrated high sensitivity and selectivity tuning of MXene-MQTF gas sensors for detecting CO, SO2, and NH3. This antisymmetric mass-transduction-based (low-cost, stable, sensitive, and practical tuning fork-based) MXene gas sensor demonstrated exceptional sensing performance, customizable selectivity, and high cost-effectiveness. This study paves the way for designing high-performance MXene-based chemical sensors and expands the scope of potential applications in air quality monitoring, wearable devices, the Internet of Things (IoT), and robotics.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-10"},"PeriodicalIF":9.7,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00452-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140045173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advance in additive manufacturing of 2D materials at the atomic and close-to-atomic scale 在原子和近原子尺度上推进二维材料的增材制造

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-03-06 DOI: 10.1038/s41699-024-00456-x

Yixin Chen, Fengzhou Fang, Nan Zhang

{"title":"Advance in additive manufacturing of 2D materials at the atomic and close-to-atomic scale","authors":"Yixin Chen, Fengzhou Fang, Nan Zhang","doi":"10.1038/s41699-024-00456-x","DOIUrl":"10.1038/s41699-024-00456-x","url":null,"abstract":"Atomic and close-to-atomic scale manufacturing (ACSM) has emerged as promising technologies in the manufacturing paradigm. Among various materials, 2D materials have garnered significant attention for ACSM due to their atomic-scale characteristics and physical properties. While chemical vapor deposition (CVD) can be employed to produce high-quality 2D materials, achieving patterning often relies on photolithography techniques, which limit scalability and introduce impurities. To address these challenges, this article serves as a review by focusing on exploring atomic-scale additive manufacturing methods for 2D materials. Several potential techniques are reviewed, including site-selective CVD, area-selective atomic layer deposition, electrodeposition, laser-assisted synthesis, print methods, and atomic layer-aligned stacking. The applications of atomic-scale additive manufacturing in various fields, such as electronics, biosensing, and nanoelectromechanical systems, are discussed. Finally, the future prospects of atomic-scale additive manufacturing for 2D materials based on existing research are delved into.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-23"},"PeriodicalIF":9.7,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00456-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140044839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exceptionally strong coupling of defect emission in hexagonal boron nitride to stacking sequences 六方氮化硼中缺陷发射与堆叠序列的超强耦合

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-03-02 DOI: 10.1038/s41699-024-00455-y

Song Li, Anton Pershin, Pei Li, Adam Gali

{"title":"Exceptionally strong coupling of defect emission in hexagonal boron nitride to stacking sequences","authors":"Song Li, Anton Pershin, Pei Li, Adam Gali","doi":"10.1038/s41699-024-00455-y","DOIUrl":"10.1038/s41699-024-00455-y","url":null,"abstract":"Van der Waals structures present a unique opportunity for tailoring material interfaces and integrating photonic functionalities. By precisely manipulating the twist angle and stacking sequences, it is possible to elegantly tune and functionalize the electronic and optical properties of layered van der Waals structures. Among these materials, two-dimensional hexagonal boron nitride (hBN) stands out for its remarkable optical properties and wide band gap, making it a promising host for solid state single photon emitters at room temperature. Previous investigations have demonstrated the observation of bright single photon emission in hBN across a wide range of wavelengths. In this study, we unveil an application of van der Waals technology in modulating their spectral shapes and brightness by carefully controlling the stacking sequences and polytypes. Our theoretical analysis reveals remarkably large variations in the Huang-Rhys factors–an indicator of the interaction between a defect and its surrounding lattice–reaching up to a factor of 3.3 for the same defect in different stacking sequences. We provide insights into the underlying mechanism behind these variations, shedding light on the design principles necessary to achieve rational and precise control of defect emission. This work paves the way for enhancing defect identification and facilitating the engineering of highly efficient single photon sources and qubits using van der Waals materials.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-8"},"PeriodicalIF":9.7,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00455-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140016465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Charge transfer mechanism for realization of double negative differential transconductance 实现双负差转导的电荷转移机制

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-02-29 DOI: 10.1038/s41699-024-00454-z

Kyu Hyun Han, Seung-Hwan Kim, Seung-Geun Kim, Jong-Hyun Kim, Sungjoo Song, Hyun-Yong Yu

{"title":"Charge transfer mechanism for realization of double negative differential transconductance","authors":"Kyu Hyun Han, Seung-Hwan Kim, Seung-Geun Kim, Jong-Hyun Kim, Sungjoo Song, Hyun-Yong Yu","doi":"10.1038/s41699-024-00454-z","DOIUrl":"10.1038/s41699-024-00454-z","url":null,"abstract":"With development of information age, multi-valued logic (MVL) technology utilizing negative differential transconductance (NDT) phenomenon has drawn attention as next-generation computing technology that can replace binary logic. However, because conventional NDT devices primarily use ternary logic, multiple-peak NDT device is required for higher-radix MVL that can process more datasets. Here, van der Waals double-peak anti-ambipolar transistor (AAT) as NDT device was developed by utilizing peak voltage (Vpeak) modulation of NDT peak. For realization of quaternary logic, Vpeak modulation technology was developed through charge transfer mechanism from channel, thereby shifting NDT peak and increasing peak-to-valley current ratio (PVCR). Furthermore, Double-peak AAT was implemented through parallel configuration of two AATs with different Vpeak values. Finally, quaternary inverter with four widely stable logic states was implemented by utilizing the developed double-peak AAT with two distinct NDT peaks and high PVCR. This double-peak AAT is expected to contribute to the development of next-generation MVL technology capable of processing datasets.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-9"},"PeriodicalIF":9.7,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00454-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140000820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electric field tunable bandgap in twisted double trilayer graphene 扭曲双三层石墨烯中的电场可调带隙

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-02-27 DOI: 10.1038/s41699-024-00449-w

Mickael L. Perrin, Anooja Jayaraj, Bhaskar Ghawri, Kenji Watanabe, Takashi Taniguchi, Daniele Passerone, Michel Calame, Jian Zhang

{"title":"Electric field tunable bandgap in twisted double trilayer graphene","authors":"Mickael L. Perrin, Anooja Jayaraj, Bhaskar Ghawri, Kenji Watanabe, Takashi Taniguchi, Daniele Passerone, Michel Calame, Jian Zhang","doi":"10.1038/s41699-024-00449-w","DOIUrl":"10.1038/s41699-024-00449-w","url":null,"abstract":"Twisted van der Waals heterostructures have recently emerged as a versatile platform for engineering interaction-driven, topological phenomena with a high degree of control and tunability. Since the initial discovery of correlated phases in twisted bilayer graphene, a wide range of moiré materials have emerged with fascinating electronic properties. While the field of twistronics has rapidly evolved and now includes a range of multi-layered systems, moiré systems comprised of double trilayer graphene remain elusive. Here, we report electrical transport measurements combined with tight-binding calculations in twisted double trilayer graphene (TDTLG). We demonstrate that small-angle TDTLG (~1.7−2.0∘) exhibits an intrinsic bandgap at the charge neutrality point. Moreover, by tuning the displacement field, we observe a continuous insulator-semimetal-insulator transition at the CNP, which is also captured by tight-binding calculations. These results establish TDTLG systems as a highly tunable platform for further exploration of magneto-transport and optoelectronic properties.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-8"},"PeriodicalIF":9.7,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00449-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139987485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Foam with direction: unraveling the anisotropic radiation shielding properties of 2D boron nitride nanoplatelet foams 有方向的泡沫：揭示二维氮化硼纳米片泡沫的各向异性辐射屏蔽特性

IF 9.7 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-02-26 DOI: 10.1038/s41699-024-00451-2

Kazue Orikasa, Cheol Park, Sang-Hyon Chu, Calista Lum, Tony Thomas, Tyler Dolmetsch, Luiza Benedetti, Arvind Agarwal

{"title":"Foam with direction: unraveling the anisotropic radiation shielding properties of 2D boron nitride nanoplatelet foams","authors":"Kazue Orikasa, Cheol Park, Sang-Hyon Chu, Calista Lum, Tony Thomas, Tyler Dolmetsch, Luiza Benedetti, Arvind Agarwal","doi":"10.1038/s41699-024-00451-2","DOIUrl":"10.1038/s41699-024-00451-2","url":null,"abstract":"Neutron radiation exposure is one of the main challenges faced during space missions. There is a critical need for advanced lightweight radiation shielding materials. Two-dimensional (2D) boron nitride nanoplatelets (BNNP) are excellent candidates for polymer matrix nanofillers due to their superior neutron shielding and thermal and mechanical properties. Furthermore, the 2D material anisotropic behavior unlocks the potential for composite property tailoring. This study fabricated ultra-lightweight lamellar BNNP foams (density 0.05 g cm–3 and 97.5% porous) via freeze-drying processing. The neutron shielding effectiveness or mass absorption coefficient of the BNNP foams with walls perpendicular to the direction of the radiation source was 14.47 cm2 g–1, while that of the foam with parallel configuration was only 8.51 cm2 g–1. The orientation-dependent neutron radiation shielding properties were modeled using the Beer-Lambert law for porous composite materials. The BNNP foam in this study has the potential to benefit advanced tailorable radiation shielding technologies for future aerospace missions.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-9"},"PeriodicalIF":9.7,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00451-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139976627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0