ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 6
·2108194
·
IF 18.808
Huibin Zhang,Junye Cheng,Honghan Wang,Zehao Huang,Qingbin Zheng,Guangping Zheng,Deqing Zhang,Renchao Che,Maosheng Cao
VB-Group transition metal disulfides (TMDs) are considered excellent materials for electromagnetic wave (EMW) absorption because of their good conductivity and abundant active sites located at their edges and substrates, as compared with VIB-Group TMDs. Herein, for the first time, EMW absorbers based on VB-Group NbS 2 nanosheets by using a facile one-step solvothermal method are successfully prepared. The minimum reflection loss (RL min ) can reach up to 43.85 dB with an effective absorption bandwidth of 6.48 GHz (11.52–18.00 GHz). The remarkable EMW absorption performance can also be reflected in the tunable frequency bands (C-, X-, and Ku-bands), which is achieved by adjusting the contents of materials. Furthermore, the influence of the content of 2H-phase and 1T-phase in NbS 2 on the EMW absorption performance is systematically investigated. The hierarchical hollow-sphere structure of NbS 2 promotes dielectric loss and the multiple reflection and absorption of EMW, and enhances the impedance matching and synergistic attenuation ability. This work demonstrates that the bottleneck of effective absorbing frequency band of single-component dielectric EMW absorbing materials could be broken through, and paves a novel path towards developing broadband absorbing materials in EMW absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Li Wenhui,Wei Xijun,Dong Hongmei,Ou Yingqing,Xiao Shenghuan,Yang Yang,Xiao Peng,Zhang Yunhuai
Layered NbS2, a member of group-V transition metal dichalcogenides, was synthesized via a colloidal synthesis method and employed as a negative material for a supercapacitor. The morphologies of NbS2 can be tuned from ultrathin nanosheets to hierarchical structures through dynamics controls based on growth mechanisms. Electrochemical energy storage measurements present that the ultrathin NbS2 electrode exhibits the highest rate capability due to having the largest electrochemical surface area and its efficient ion diffusion. Meanwhile, the hierarchical NbS2 shows the highest specific capacitance at low current densities for small charge transfer resistance, displays 221.4 F g−1 at 1 A g−1 and 117.1 F g−1 at 10 A g−1, and cycling stability with 78.9% of the initial specific capacitance after 10,000 cycles. The aggregate or stacking of nanosheets can be suppressed effectively by constructing hierarchical structure NbS2 nanosheets.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Dongqian Xu,Xiaojun He,Enoch Obeng,Zhangyan Ye,Jianliang Shen,Xi Ding
Antibiotic resistance and bacteria-related infections pose a threat to lives around the globe, which calls for urgent development of advanced therapy to curb this menace. Although photothermal therapy (PTT) is promising, most photothermal agents lack good photothermal conversion performance which restrains their application. Transition metal dichalcogenides (TMDs) nanosheets can exhibit many advantages in antibacterial applications due to their unique two-dimensional structure with larger specific surface area and higher near-infrared (NIR) absorption. Here, we prepared two-dimensional NbS 2 nanosheets (NbS 2 NSs) with good biological stability and high biocompatibility through a high-temperature reduction reaction. NbS 2 NSs exhibited excellent and stable photothermal properties, which were capable of killing Pseudomonas aeruginosa ( P. aeruginosa ) and Staphylococcus aureus ( S. aureus ) under 5 min of 808 nm laser irradiation. In addition, the morphological characterization of bacteria showed bacterial cell membrane destruction. Furthermore, NbS 2 NSs under NIR irradiation inhibited the formation of biofilms and quickly eradicated S. aureus from an infected wound to promote wound healing through a hyperthermia effect. Overall, this work provides an attractive strategy for synthesizing and applying two-dimensional NbS 2 NSs with significant implications for bacterial eradication and future biomedical applications.
研究领域:
医学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2023
·Vol. 5
·期 3
·830-839
·
IF 4.7
Yazhou Huang,Yunfei Zhang,Junyan Lv,Yinfeng Shao,Dongfang Yang,Yuan Cong
The sensitive detection of cardiac troponin I (cTnI) is of great significance for the early diagnosis of acute myocardial infarction (AMI). Herein, in order to fabricate an electrochemical biosensor for ultrasensitive cTnI detection, atomic layer deposition (ALD) was employed to directly deposit NbS2 nanoflakes (NFs) on carbon fiber paper (CFP). Due to the self-limiting reaction of ALD, NbS2NFs were deposited uniformly and accurately on the surface of carbon fibers by controlling the number of ALD cycles, which ensured ultrasensitive detection. Precise regulation of the nanoscale morphology and electrochemical performance of NbS2 nanoflakes via ALD cycles was observed in depth. Owing to the high surface area and conductivity, an anodic/cathodic current of ∼3.01 mA of NbS2NFs/CFP can be obtained. Subsequently, an electrochemical biosensor based on the excellent performance of NbS2NFs/CFP was fabricated. The ultrasensitive detection of cTnI in a linear range of 1 fM to 0.1 nM with a detection limit of 0.32 fM was achieved.
研究领域:
材料科学
·
生物化学
·
电化学
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）