Nanomaterials
·
2024
·Vol. 15
·期 1
·52
·
IF 4.4
Hao Yan,Bingxue Li,Junjie Pan,Xuan Fang,Yongji Yu,Dengkui Wang,Dan Fang,Yanyan Zhan,Xiaohua Wang,Jinhua Li,Xiaohui Ma,Guangyong Jin
As an emerging two-dimensional (2D) Group-VA material, bismuth selenide (Bi2Se3) exhibits favorable electrical and optical properties. Here, three distinct morphologies of Bi2Se3were obtained from bulk Bi2Se3through electrochemical intercalation exfoliation. And the morphologies of these nanostructures can be tuned by adjusting solvent polarity during exfoliation. Then, the nonlinear optical and absorption characteristics of the Bi2Se3samples with different morphologies were investigated using open-aperture Z-scan technology. The results reveal that the particle structure of Bi2Se3exhibits stronger reverse saturable absorption (RSA) than the sheet-like structure. This is attributed to the higher degree of oxidation and greater number of localized defect states in the particle structure than in the sheet-like structure. Electrons in these defect states can be excited to higher energy levels, thereby triggering excited-state and two-photon absorption, which strengthen RSA. Finally, with increasing the RSA, the optical limiting threshold of 2D Bi2Se3can also be increased. This work expands the potential applications of 2D Bi2Se3materials in the field of broadband nonlinear photonics.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Hao Zhou,Lin Che,Zhaoming Guo,Minghuo Wu,Wenqing Li,Weiping Xu,Lifen Liu
Bismuth selenide (Bi2Se3) attracts a lot of attention nowadays due to its unique electronic and thermoelectric properties. In this study, fabrication of Bi2Se3 nanosheets by selenite-reducing bacterium (SeRB) was first reported. Morphology, size, and location of the biogenic Bi2Se3 are bacteria-dependent. It is difficult to separate Bi2Se3 generated by Bacillus cereus CC-1 (Bi2Se3-C) from the biomass because of strong interaction with the cell membrane. However, Bi2Se3 produced by Lysinibacillus sp. ZYM-1 (Bi2Se3-Z), is highly dispersed in extracellular space with high stability. Further characterization by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) on Bi2Se3-Z indicates that the product is a rhombohedral-phase, ultrathin nanosheet-like structure with an average size of ∼100 nm. Subsequently, the photothermal performance of Bi2Se3-Z with the irradiation of 808 nm near-infrared (NIR) laser was determined. When the Bi2Se3-Z concentration was 26 mg L–1, and irradiation power was 2 W, the photothermal conversion efficiency was calculated as 30.7%. At the same condition, 100% of the MCF7 and A549 cancer cells were killed within 10 min of irradiation in vitro. Moreover, using 1% (v/v) PVP as surfactant, a novel nanodumbbell structure of Bi2Se3 was obtained. Overall, this bacteria-driven Bi2Se3 fabrication paves a new way for biocompatible photothermal nanomaterials.
研究领域:
材料科学
·
纳米技术
·
癌症治疗
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 14
·2056
·
IF 5.3
Jiayi Chen,Guodong Wu,Yamei Ding,Qichao Chen,Wenya Gao,Tuo Zhang,Xu Jing,Huiwen Lin,Feng Xue,Li Tao
The topological insulator 2D Bi2Se3is promising for electronic devices due to its unique electronic properties; however, it is challenging to prepare antioxidative nanosheets since Bi2Se3is prone to oxidation. Surface passivation using ligand agents after Bi2Se3exfoliation works well to protect the surface, but the process is time-consuming and technically challenging; a passivation agent that is stable under a highly biased potential is significant for in situ passivation of the Bi2Se3surface. In this work, the roles of halide anions (Cl−, Br−, and I−) in respect of the chemical properties of synthetic Bi2Se3nanosheets during electrochemical intercalated exfoliation were investigated to determine the antioxidation capacity. It was found that Bi2Se3nanosheets prepared in a solution of tetrabutylammonium chloride (TBA+and Cl−) have the best oxidation resistance via the surface bonding of Bi with Cl, which promotes obtaining better device stability. This work paves an avenue for adjusting the components of the electrolyte to further promote the stability of 2D Bi2Se3-nanosheet-based electronic devices.
研究领域:
材料科学
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纳米技术
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电化学
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 9
·1-10
·
IF 2.127
Li Dong,Fang Minjie,Jiang Chunli,Lin Hechun,Luo Chunhua,Qi Ruijuan,Huang Rong,Peng Hui
Bismuth selenide (Bi 2 Se 3 ) has attracted great attention as one of typical topological insulator materials. In this work, size-controllable Bi 2 Se 3 nanoflowers (NFs) composed of numerous thin nanosheets are successfully synthesized by a hot-solution injection method under mild conditions. The structure and morphology of the obtained Bi 2 Se 3 NFs are characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopic (EDS), and selected area electron diffraction (SAED) techniques. The reaction temperature, time, and surfactant ratio (oleylamine/oleic acid) affect the phase purity and morphology of Bi 2 Se 3 samples. Based on the experimental results, the formation mechanism of Bi 2 Se 3 nanoflowers is proposed. Meanwhile, the photocatalytic behavior of the as-prepared Bi 2 Se 3 nanoflowers in the presence of H 2 O 2 is explored and it is found that the degrading rate of RhB can reach 93% after 2 h visible light irradiation.
研究领域:
材料科学
·
纳米技术
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2017
·Vol. 7
·期 9
·257
·
IF 1.566
Rui Liu,Xing Tan,Guangkun Ren,Yaochun Liu,Zhifang Zhou,Chan Liu,Yuanhua Lin,Cewen Nan
Polycrystalline Bi2Se3−xTex(x = 0~1.5) samples were prepared by self-propagating high-temperature synthesis (SHS) combined with spark plasma sintering (SPS) and their thermoelectric properties were investigated. The SHS-SPS process can shorten the time with few energy consumptions, and obtain almost pure Bi2Se3-based phases. Consequently, the Se vacancies and anti-site defects contribute to the converged carrier concentration of ~2 × 1019cm−3while the increased carrier effective mass enhances the Seebeck coefficient to more than −158 μV K−1over the entire temperature range. The lattice thermal conductivity is suppressed from 1.07 Wm−1K−1for the pristine specimen to ~0.6 Wm−1K−1for Te-substitution samples at 300 K because of point defects caused by the difference of mass and size between Te and Se atoms. Coupled with the enhanced power factor and reduced lattice thermal conductivity, a highZTof 0.67 can be obtained at 473 K for the Bi2Se1.5Te1.5sample. Our results reveal that Te-substitution based on the SHS-SPS method is highly-efficient and can improve the thermoelectric properties of Bi2Se3-based materials largely.
研究领域:
材料科学
·
凝聚态物理
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无机非金属材料
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能源材料
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热电转换
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Yanbang Lian,Congcong Wang,Yu Meng,Junqiang Dong,Jianbin Zhang,Gongxun Bai,Jianbo Gao
Rational design and preparation of multifunctional low dimensional nanomaterials are of great importance for in vivo imaging and safety therapy. Meanwhile, nanomaterials with good bio-compatible and effectively photothermal conversion are still demanded to be fabricated in biomedicine. In this work, we have developed two-dimensional bismuth selenide nanosheets as the imaging and photothermal nanoagents. Through doping engineering, the near infrared photothermal conversion of Nd doped nanosheets was boosted by 52 %, which is higher than many previous works. Besides, the prepared nanomaterials can realize infrared and in vivo computed X-ray tomography bioimaging, due to the rich optical-magnetic properties of Nd atoms. The in vitro and vivo experiments with mice display that the Nd doped nanosheets have low toxicity and high biocompatibility. More importantly, the nanomaterials can efficiently achieve photothermal tumor ablation. It is suggested that designed and developed nanosheets have promising applications for biomedicine.
研究领域:
纳米技术
·
生物医学工程
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材料科学
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癌症治疗
·
成像技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Yanbang Lian,Congcong Wang,Yu Meng,Junqiang Dong,Jianbin Zhang,Shiqing Xu,Gongxun Bai,Jianbo Gao
Photothermal therapy has been regarded as one of promising ways for tumor treatment. However, nanoagents with highly efficient thermal conversion and good bio-compatibility are still needed to be developed in biomedicine. In this work, we prepared two-dimensional heterostructures with bismuth selenide and tungsten selenide nanosheets as photothermal nanoagents. Near-infrared photothermal conversion of selenide heterostructure nanosheets can reach up to 40.75% under 808 nm excitation. It is known that selenium is a critical element to human health. More importantly, our experiments with mice show that the heterostructure nanosheets have low toxicity and high biocompatibility both in vitro and in vivo. The nanoagents based on heterostructures can effectively realize photothermal tumor ablation. It is suggested that the developed selenide nanosheets have great potential application in cancer therapy.
研究领域:
纳米技术
·
生物医学工程
·
材料科学
·
癌症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2016
·
IF 13.334
Zhenglin Li,Jing Liu,Ying Hu,Kenneth A. Howard,Zhuo Li,Xuelei Fan,Manli Chang,Ye Sun,Flemming Besenbacher,Chunying Chen,Miao Yu
Elaborately designed biocompatible nanoplatforms simultaneously having diverse therapeutic and imaging functions are highly desired for biomedical applications. Herein, a Bi2Se3 nanoagent with a special morphology as a nanoscale spherical sponge (NSS) has been fabricated and investigated in vitro and in vivo. The highly porous NSS exhibits strong, steady, and broad-band absorbance in the near-infrared range as well as high efficiency and stability of photothermal conversion, resulting in high antitumor efficacy for photothermal therapy (PTT). Together with a high X-ray attenuation coefficient (218% that of the clinically used iopromide), the NSS shows excellent performance on triple-modal high-contrast imaging, including X-ray-computed tomography, multispectral optoacoustic tomography, and infrared thermal imaging. Furthermore, the high surface area and porous structure impart the NSS a competent drug loading capability as high as 600% of that on Bi2Se3 nanoplates, showing a bimodal pH/photothermal sensitive drug release and pronounced synergetic effects of thermo-chemotherapy with a tumor inhibition ratio even higher than that of PTT alone (∼94.4% vs ∼66.0%). Meanwhile, the NSS is highly biocompatible with rather low in vitro/in vivo toxicity and high stability, at variance with easily oxidized Bi2Se3 nanoagents reported previously. Such biocompatible single-component theranostic nanoagents produced by a facile synthesis and highly integrated multimodal imaging and multiple therapeutic functions may have substantial potentials for clinical antitumor applications. This highly porous nanostructure with a large fraction of void space may allow versatile use of the NSS, for example, in catalysis, gas sensing, and energy storage, in addition to accommodating drugs and other biomolecules.
研究领域:
纳米技术
·
癌症治疗
·
生物医学工程
·
材料科学
·
药学
·
医学成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Zhaoming Guo,Ye Liu,Hao Zhou,Kun Zheng,Dong Wang,Mingli Jia,Pengcheng Xu,Kun Ma,Changhao Cui,Li Wang
CD47 , a transmembrane protein overexpressed in most tumors, limits macrophage phagocytosis by interacting with macrophage signal-regulated protein α (SIRPα). In this study, we have developed CD47-targeted bismuth selenide nanoparticles (Ab-PEG-Bi 2 Se 3 ) that increase phagocytosis of cancer cells by macrophages to actualize improved photothermal therapy (PTT). The functionalized nanoparticles were constructed by conjugating anti-CD47 antibody (Ab) to PEGylated bismuth selenide nanoparticles (PEG-Bi 2 Se 3 ). The anti-CD47 antibody modified on the nanoparticles enhanced the phagocytic activity of macrophages toward tumor cells by specifically blocking the crosstalk between CD47 and SIRPα. Meanwhile, Ab-PEG-Bi 2 Se 3 showed excellent photothermal performance including strong near infrared (NIR) absorbance, high photothermal conversion efficiency and photostability, and exhibited outstanding in vitro PTT effect under NIR laser irradiation. In vivo therapeutic experiments revealed that this CD47-targeted PTT nanoagent, with the assistance of enhanced macrophage phagocytosis, achieved the goal of tumor eradication. Besides, toxicity studies confirmed that Ab-PEG-Bi 2 Se 3 had good biocompatibility. In conclusion, Ab-PEG-Bi 2 Se 3 may serve as an efficient PTT platform in combination with macrophage-mediated immunotherapy to improve antitumor efficacy.
研究领域:
肿瘤学
·
纳米技术
·
免疫疗法
·
生物医学工程
✓ 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）