ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Qiangqiang Chen,Qiji Ma,Ziyu Hu,Junying Zhang,Chengyou Lin,Jin Ge,Song Bi,Zhi-Ling Hou
The development of low-frequency microwave absorbers is facing a critical challenge that conventional impedance-matching strategies based on λ/4 resonance principles necessitate prohibitively thick of materials, particularly for frequencies below 3 GHz. To address this conflict issue, Mg 2+ -substituted topological insulator Bi 2 Te 3 nanosheets are synthesized, leveraging carrier transport modulation to enable low-frequency absorption. Experimental and theoretical results reveal that Mg 2+ doping systematically regulates carrier types and concentrations in both surface states and bulk states, thereby tailoring the dielectric response. Remarkably, the doped nanosheets achieve an ultrahigh relative permittivity of up to 100 at 2 GHz while maintaining a low loss tangent ( tanδ ɛ < 0.4), overcoming the inherent permittivity-loss trade-off in traditional microwave absorbers. This anomalous behavior is attributed to changes in electrical transport caused by Mg doping, affecting both the surface and bulk states. A breakthrough electrical thickness (d/λ) of 0.029 is achieved in the doped material for 99% microwave absorption at 2.6 GHz, representing the thinnest S band absorber based on natural materials reported to date. This work establishes a carrier engineering paradigm to address the longstanding oversize thickness challenge in low-frequency microwave absorption technologies.
研究领域:
材料科学
·
凝聚态物理
·
微波技术
·
纳米材料
·
电磁吸收
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产品关联
DOI
高影响因子
Biomaterials Science
·
2020
·Vol. 8
·期 21
·5874-5887
·
IF 6.183
Zhihao Zhou,Wei Zhang,Lei Zhang,Yang Cao,Zhigang Xu,Yuejun Kang,Peng Xue
Two-dimensional Bi2Te3 nanosheets (NSs) have recently been validated as a new type of photothermal agent to provide an alternative option for tumor ablation via light-induced hyperthermia. However, the surface of Bi2Te3 NSs lacks active radicals for the conjugation of functional molecules, which undoubtedly impedes their versatile utilization in medical areas. Here, the surface activation of Bi2Te3 NSs was accomplished via the in situ growth of an SiO2 nanoshell assisted by tetraethyl orthosilicate (TEOS). Upon the co-condensation of (3-aminopropyl)triethoxysilane (ATPES), terminal amino groups (–NH2) were generated on the surface of the Bi2Te3@SiO2 NSs, which were further covalently coupled with the photosensitizer chlorin e6 (Ce6) through a standard amide reaction. The resultant Bi2Te3@SiO2/Ce6 (BSC) NSs displayed admirable photothermal properties, a high Ce6 loading capacity, and good biocompatibility. Upon dual-wavelength laser irradiation, an excellent tumor suppression effect arising from thermal ablation and reactive oxygen species (ROS)-induced apoptosis was verified both in cell experiments and in animal studies. In addition, synchronous fluorescence/photoacoustic/infrared (FL/PA/IR) tri-modal imaging could provide useful information for both tumor diagnosis and prognosis. Overall, this facile strategy for the activation of Bi2Te3 is regarded to be universal for the development of more versatile Bi2Te3-based nanoplatforms, which should favor the rapid diagnosis and effective treatment of fatal diseases.
研究领域:
纳米医学
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癌症治疗
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Pengfei Xu,Kangpeng Jin,Yuan Yu,Ming Huang,Zhenhua Yan,Xiang Li,Xiao Gao,Liangwei Fu,Biao Xu
The untapped potential of sub-nanometric materials (SNMs) in constructing high-performance thermoelectrics (TE) presents a promising yet unexplored avenue. This study investigates the utilization of supertetrahedral CdS clusters, representing SNMs, in conjunction with state-of-the-art Bi 2 Te 3 -based systems. The CdS cluster with size-dependent electronic structure enables selective interface scattering of carriers, while its 1 nm size and size-dependent phonon density of states (DOS) contribute to significant interfacial thermal resistance. Furthermore, interfacial dislocations and significant grain refinement induced by the incorporation of the CdS cluster boost the mechanical properties. Consequently, a remarkable peak figure of merit ( ZT ) value of 1.47 at 350 K and a record-high Vickers hardness of 1.08 GPa is achieved in the Bi 0.5 Sb 1.5 Te 3 /0.1 wt% CdS cluster composite. The robust TE module achieves an excellent conversion efficiency of about 6.1% under a ΔT of 241 K. This work opens up exciting possibilities for utilizing 1 nm clusters in thermoelectrics and even inspires other fields involving size-dependent electrical and thermal transport behaviors.
研究领域:
材料科学
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热电学
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纳米技术
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固体物理
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DOI
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 35
·7271-7277
·
IF 6.331
Ying Zhao,Yang Liu,Qishun Wang,Jianhua Liu,Songtao Zhang,Tianqi Zhang,Daguang Wang,Yinghui Wang,Longhai Jin,Hongjie Zhang
Photothermal therapy (PTT) stimulated by light in the second near-infrared (NIR-II) biowindow shows great superiorities in the penetration ability of tissue and maximum permissible exposure (MPE). Exploring new photothermal agents with good optical absorbance in the NIR-II region is highly desirable for efficient cancer therapy. Herein, we successfully prepare carambola-like bismuth telluride (Bi2Te3) superstructures modified with PEGylated phospholipid (Bi2Te3@PEG) for CT imaging-guided PTT in the NIR-II biowindow. Attributing to their superstructures, Bi2Te3@PEG exhibited enhanced photoabsorption with higher photothermal conversion efficiency (55.3% for 1064 nm) compared with that of Bi2Te3 nanoparticles. Furthermore, the good X-ray attenuation capacity of Bi endows Bi2Te3@PEG with an outstanding performance as computed tomography (CT) contrast agents. Bi2Te3@PEG superstructures have been confirmed to effectively eliminate tumor in vitro and in vivo with negligible long-term toxicities, offering them great potential to act as theranostic platforms for cancer diagnosis and treatment.
研究领域:
材料科学
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纳米技术
·
生物医学工程
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癌症研究
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诊疗学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Ruxia Du,Hang Ju,Miaomiao Wei,Peiyu Zeng,Xuyan Zhang,Beibei Zhu,Junpeng Lu,Zhenhua Ni,Xing Gu,Wenhui Wang,Li Tao
There is an increasing demand on flexible or wearable position-sensitive detectors (PSDs) for high-precision positioning in robots or drones driven by artificial vision. Inherited from conventional materials, e.g., ultrathin Si or multilayer heterojunctions, existing flexible PSDs still suffer from narrow spectral response, poor long-term stability, and complicated fabrication process. Here we introduce the photothermoelectric effect from thermoelectric Bi 2 Te 3 to create a new type of flexible photothermoelectric PSDs. Such devices can reach a maximum responsivity of 423.2 mV W −1 at room temperature with 43.55 ms response time. Unlike lateral photovoltaic effect based counterparts, our flexible PSDs rely on a single thermoelectric material without heterojunctions or p-n junctions, enabling position identification and two-dimensional spot trajectory tracking from visible to near-infrared (1550 nm). We also developed a theoretical model for the lateral photothermoelectric effect that quantitatively relates the light-induced temperature field and thermoelectric voltage to the spot position, matching experimental data well over the full position range. The device output remains stable after 1000 bending cycles. This work thus offers an assessable, cost-effective, and robust route to flexible position-sensitive photodetectors with broad spectral response in automation of artificial visions smart robotics or drones.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Abubakar Yakubu Haruna,Yubo Luo,Zheng Ma,Wang Li,Haiqiang Liu,Xin Li,Qinghui Jiang,Junyou Yang
The thermoelectric performance of n-type Bi2Te3 needs further enhancement to match that of its p-type Bi2Te3 counterpart and should be considered for competitive applications. Combining Cu/Cl and multiscale additives (AgBiSe2) presents a suitable route for such enhancement. This is evidence of the enhanced thermoelectric performance of Bi1.995Cu0.005Te2.69Se0.33Cl0.03. Moreover, by incorporating 0.65 wt % AgBiSe2 (ABS) into Bi1.995Cu0.005Te2.69Se0.33Cl0.03, we further reduce its lattice thermal conductivity to ∼0.28 W m–1 K–1 at 353 K owing to the extra phonon scattering of multiscale ABS. Additionally, the Seebeck coefficient enhances (−183.89 μV K–1 at 353 K) owing to the matrix’s reduced carrier concentration caused by ABS. As a result, we achieve a high ZT of ∼1.25 (at 353 K) and a high ZTave of ∼1.12 at 300–433 K for Bi1.995Cu0.005Te2.69Se0.33Cl0.03 + 0.65 wt % ABS. This work provides a promising strategy for enhancing the thermoelectric performance of n-type Bi2Te3 through Cu/Cl doping and ABS incorporation.
研究领域:
材料科学
·
能源材料
·
热电材料优化
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hao Zhao,Baoyin Xu,Zhanhui Ding,Yanfeng Xue,Jing Yang,Wei Zhao,Yongfeng Li,Bin Yao,Hongdong Li,Yucheng Lan
Bismuth telluride is a widely used commercial thermoelectric material with excellent thermoelectric performances near room temperature. Reducing thermal conductivity is one of the most effective ways to improve performances of thermoelectric materials. In this study, the thermal conductivity of the material was reduced by fabricating porous structures. Highly dense NaCl-(Bi,Sb) 2 Te 3 composites were fabricated by a high-pressure technology. The NaCl phase was then removed from the composites by ultrasonic washing to produce porous structures. The produced (Bi,Sb) 2 Te 3 porous materials possessed excellent thermoelectric properties. The porosity and pore size of the (Bi,Sb) 2 Te 3 porous materials increased with the increasing NaCl content, decreasing the thermal conductivity significantly. An ultra-low lattice thermal conductivity of 0.21 Wm −1 K −1 at 493 K was achieved when the porosity was 39%, almost the lowest lattice thermal conductivity reported for (Bi,Sb) 2 Te 3 bulk materials. The figure of merit ZT value was enhanced to 1.05 at 493 K when the porosity was 25%. Compared with the most compacted samples ( ZT = 0.79 and porosity of 10%) prepared under the same conditions, the ZT value of the porous samples increased by 33%. This study indicated that porous thermoelectric materials can be prepared simply, quickly and efficiently by high-pressure/ultrasonication washing to improve thermoelectric performances, which has evident reference values for preparing other thermoelectric pore materials with enhancing behaviors.
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Abubakar Yakubu Haruna,Yubo Luo,Wang Li,Zheng Ma,Tian Xu,Qinghui Jiang,Junyou Yang
Bismuth telluride-based (Bi2Te3) alloys have long been considered the best thermoelectric (TE) materials at room temperature. However, the n-type Bi2Te3 alloys always exhibit poor thermoelectric performance than their p-type counterpart, which severely limits the energy conversion efficiency of thermoelectric devices. Here, we demonstrate that incorporating AgBiSe2 can concurrently regulate the electrical and thermal transport properties as well as improve the mechanical performance of n-type Bi2Te2.69Se0.33Cl0.03 for high thermoelectric performance. Among these, AgBiSe2 effectively enhanced the Seebeck coefficients of n-type Bi2Te2.69Se0.33Cl0.03 due to the reduced carrier concentration and reduced the thermal conductivity of n-type Bi2Te2.69Se0.33Cl0.03 owing to the enhanced phonon scattering by AgBiSe2 as well as its low thermal conductivity nature. Consequently, the simultaneous optimization of electrical and thermal transport properties enables us to achieve a maximum ZT of ∼1.21 (at ∼353 K) and an average ZTave of ∼1.07 (300–433 K) for 3.5 wt % AgBiSe2-incorporated Bi2Te2.69Se0.33Cl0.03, which are ∼25.62 and ∼23.36% larger than those of Bi2Te2.69Se0.33Cl0.03, respectively. This work proves that the incorporation of AgBiSe2 is an efficient way to improve the thermoelectric performance of bismuth telluride-based materials.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 2
·326
·
IF 5.3
Min Sun,Pengyu Zhang,Guowu Tang,Dongdan Chen,Qi Qian,Zhongmin Yang
High-performance thermoelectric fibers with n-type bismuth telluride (Bi2Te3) core were prepared by thermal drawing. The nanosheet microstructures of the Bi2Te3core were tailored by the whole annealing and Bridgman annealing processes, respectively. The influence of the annealing processes on the microstructure and thermoelectric performance was investigated. As a result of the enhanced crystalline orientation of Bi2Te3core caused by the above two kinds of annealing processes, both the electrical conductivity and thermal conductivity could be improved. Hence, the thermoelectric performance was enhanced, that is, the optimized dimensionless figure of merit (ZT) after the Bridgman annealing processes increased from 0.48 to about 1 at room temperature.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiang Wang,Siliang Wang,Ning Wei,Rangyun Wu,Wei Zeng,Li Wen,Zhiliang Chen,Pengbin Gui,Dong Liang
Recently, metal chalcogenides (MCS) with high conductivity, natural abundance and stable structure are kind of the potential cathode materials of aqueous zinc-ion batteries (ZIBs). However, compared with manganese based and vanadium based cathode materials, there are few studies and reports on MCS in the field of ZIBs. Here, for the first time, 2D layered Bi 2 Te 3 nanosheets were used as cathode to construct a novel aqueous Bi 2 Te 3 /zinc battery. A series of experiments and calculations in this work have verified that Bi 2 Te 3 nanosheets are excellent cathode material for ZIBs. Thanks to robust structure, good electronic conductivity and low zinc ion diffusion energy barrier of Bi 2 Te 3 nanosheets, the aqueous Bi 2 Te 3 /zinc battery exhibits a large reversible capacity of 413.2 mAh/g (0.4 A/g) and long lifespan of 1500 cycles (77% retention at 2 A/g) in 2 M ZnSO 4 electrolyte. Besides, the quasi-solid-state Bi 2 Te 3 /zinc battery shows excellent rate performance and high thermal stability (works well in a high temperature environment of 70 ℃). This work provides enlightenment for the development of advanced cathode materials for new generation of ZIBs with high performance, safety and stability.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xin He,Rongfei Wei,Xiangling Tian,Jianrong Qiu,Mei Zhang,Qingguang Zeng,Junyan Liu
Te-Bi 2 Te 3 alloy thin film has grown on silicon dioxide substrate by thermal evaporation technique. The Bi 2 Te 3 rhombohedral structure enriched Te in the prepared thin film was identified by high solution transmission electron microscopy (HRTEM), X-Ray diffraction (XRD), Raman spectrum and X-ray photoelectron spectroscopy (XPS). Interestingly, the Te-Bi 2 Te 3 alloy thin film presents a changeover from saturable absorption (SA) to reverse saturable absorption (RSA) as continuously increasing the input intensity, which has been investigated using the open-aperture (OA) z-scan measurement under a femtosecond-pulsed laser at 800 nm. A high modulation depth of 48.3% and large saturation intensity of 24.1GW/cm 2 of the thin film were obtained. Moreover, a large nonlinear absorption coefficient β of ∼10 3 cm/GW is increased with the input intensity elevated. The research results demonstrate that the Te-Bi 2 Te 3 alloy thin film could be an emerging optical material for saturable absorber in Q-switched or mode-locking fiber lasers at low incident intensity while serve as optical limiter at high incident intensity.
研究领域:
材料科学
·
凝聚态物理
·
光学工程
·
纳米材料
·
光电子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Gong-Peng Cui,Chang-Ping Feng,Shao-Cun Xu,Kai-Yin Sun,Jin-Chao Ji,Lei Hou,Hong-Bo Lan,Hong-Jing Shang,Fa-Zhu Ding
Thermoelectric generators (TEGs) are environmentally friendly energy harvesting technologies that hold great promise in the field of self-powered electronics and sensing. However, the current development of thermoelectric (TE) devices has largely lagged behind the development of thermoelectric materials, especially in the preparation of thermoelectric components with customizable shapes and excellent properties, which largely limits their practical applications. These issues can be effectively addressed by using 3D printing technology. Here, we print multiple p-type thermoelectric legs (pins) consecutively with this simple technique, and the printed TEGs have excellent thermal potential (288 μV K–1 at room temperature) and excellent temperature response properties, which exhibited an output voltage of 127.94 mV at a temperature difference (ΔT) of 40 K. The 3D-printed thermoelectric generator enables the collection of thermal energy. In addition, the device has excellent temperature sensing characteristics, and this temperature signal to electrical signal conversion is very rapid, which enables temperature sensing alarms in a wide temperature domain. Combining these features, an energy harvesting and electrical alarm concept for home-scale applications is proposed, which is expected to provide a diverse research idea for the application of next-generation thermoelectric devices.
研究领域:
材料科学
·
能源技术
·
增材制造
·
热电材料
·
传感器
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）