Nanomaterials
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2022
·Vol. 12
·期 4
·624
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IF 5.719
Yanjun Zhang,Yaxin Zhao,Rui Guo,Zengxing Zhang,Dan Liu,Chenyang Xue
Currently, there are several thermoelectric materials, such as Ag2Te, Bi2Te3, and Sb2Te3, that have been investigated for thermoelectric applications. However, the toxicity and rarity of most of these materials make them unsuitable for practical applications. In contrast, silver selenide (Ag2Se) is an abundant and environment-friendly thermoelectric material. This study provides a facile synthetic approach for preparing high-performance, low-cost, and flexible Ag2Se thermoelectric films. Ag2Se nanomaterials were prepared based on the chemical template method, and the reaction solution concentration was varied to systematically investigate the effects of reaction solution concentration on the characterization and thermoelectric properties of Ag2Se nanomaterials. For convenience of testing, the flexible Ag2Se films were prepared on porous nylon membranes using vacuum-assisted filtration. The prepared thermoelectric films were tested using an X-ray diffractometer, scanning electron microscope, Seebeck coefficient tester, and Hall tester. The film prepared from the solution with the lowest concentration (18.0 mM) demonstrated the best thermoelectric performance, with a maximum power factor of 382.18 μW∙m−1∙K−2at ~400 K. Additionally, a cold-pressing treatment could effectively enhance the electrical conductivity of the film, without damaging the substrate, as the conductivity of the film remained at 90% of the original value after 1500 bending cycles.Keywords:silver selenide;vacuum-assisted filtration;flexible film;thermoelectric properties
研究领域:
材料科学
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能源技术
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DOI
PubMed
高影响因子
ACS Sensors
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2025
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IF 9.1
Xiaolong Sun,Yue Hou,Zheng Zhu,Qianfeng Ding,Wenjie Zhou,Zhanglong Xia,Sijia Yan,Yong Liu,Qingqing He,Yang Yang,Ziyu Wang
Thermoelectric textiles have garnered significant attention in energy harvesting and temperature sensing due to their comfort and reliable long-term power generation capabilities. However, existing thermoelectric textiles rarely realize antibacterial, high output performance, and sensing capabilities simultaneously. Here, we present a facile and scalable method for fabricating n-type silver selenide (Ag2Se) cotton threads with exceptional antibacterial, high power output, and advanced sensing capabilities. The Ag–Ag2Se segmented structures are prepared using the segmented selenization method. Subsequently, a thermoelectric textile consisting of 50 pairs of p–n legs is fabricated, which can generate a power density of 500 μW m–2 at a temperature difference of 30 K, and it can provide an output voltage of 24.7 mV when worn on the arm at room temperature. The textile-based sensor exhibits temperature detection (0.7 K) and a response time (2.49 s). Integrating Ag2Se cotton threads onto textiles enables the utilization of multipixel touchpads for writing and communication. Additionally, these sensors can be incorporated into gloves to accurately detect the surrounding objects’ temperatures. This thermoelectric cotton thread not only facilitates energy harvesting but also establishes a solid foundation for widespread application in multifunctional textile electronics.
研究领域:
材料科学
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纺织工程
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生物医学工程
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DOI
PubMed
高影响因子
ACS Applied Energy Materials
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2024
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IF 5.4
Lida Jia,Wenjing Ai,Jie Gao,Jia-Chen Guo,Hui Ruan,Lei Miao,Chengyan Liu
Screen printing is a promising technology to realize the large-scale production of flexible thermoelectric films, and Ag2Se is considered as the upcoming generation of room-temperature N-type thermoelectric materials that can substitute N-type Bi2Te3-based alloys. However, since the reported screen-printed Ag2Se-based flexible films were not properly sintered, their thermoelectric performance is far from satisfactory. In this work, hot pressing technology is applied to sinter the nylon-supported flexible Ag/Ag2Se thermoelectric films, and the carrier transport characteristics and power factor of the films were optimized by adjusting the hot pressing pressure and duration. For the film hot-pressed with 40 MPa and 10 min, a high power factor of 3002.14 μWm–1K–2 has been achieved at 303 K. This film also shows an excellent flexibility, and with a bending radius of 1.5 cm, the internal resistance of the film changes little after being bent 500 times. This work provides a feasible idea for improving the thermoelectric performance of Ag2Se-based films prepared by screen printing.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
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2020
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IF 5.866
Xingju Yang,Chen Wang,Xiaoxu Zhang,Yue Wang,Feng Gao,Lixia Sun,Wenli Xu,Changxiu Qiao,Guiqin Zhang
Silver selenide nanoparticles have advantages of low cytotoxicity, desirable near-infrared light response characteristics, and easy surface modification, which attract increasing attention in chemo-photothermal therapy and nursing care of cancer patients. In this contribution, we synthesized Ag2Se nanoparticles modified by the surfactant of cetyltrimethylammonium bromide (CTAB) using a ligand exchange strategy. Their microstructure and composition were characterized by transmission electron microscopy, X-ray diffraction, X-ray Photo-electronic Spectroscopy, and Fourier transform infrared spectroscopy. The CTAB modified Ag2Se nanoparticles exhibited a uniform diameter distribution centered at ~12 nm. In order to investigate the photothermal and adsorption effects of CTAB-Ag2Se nanocomposites, we also prepared sodium dodecyl benzene sulfonate (SDBS) modified Ag2Se nanoparticles to make a comparison. The CTAB-Ag2Se nanoparticles showed high photothermal properties, a photothermal conversion efficiency of 20.1% and a high drug adsorption performance of 48.2 μg/mg. Importantly, the CTAB-Ag2Se-DOX presented an MCF-7 cell activity of only 27.3% under near-infrared radiation. The results revealed that the surface-modified Ag2Se nanoparticles with CTAB had stronger antitumor ability.
研究领域:
生物医学工程
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肿瘤学
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护理学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Xiaohong Xia,Xuan Shen,Yonglin Du,Weichun Ye,Chunming Wang
Cellular glutathione plays critical roles in protecting neuronal cells against dopamine induced oxidative stress and electrophilic cellular damage; inspired by above mentioned properties of glutathione, we used glutathione as a polymerization inhibitor to develop a dopamine biosensor which can be used in alkaline environment. The detection of dopamine in alkaline environment has been challenged by its polymerization for many years, glutathione as a kind of thiol can be used to prevent the polymerization of dopamine in alkaline environment by eliminating the electrophilic quinone molecules needed during the polymerization. In order to enhance the electrochemical performance of electrode, Ag 2 Se/MoSe 2 composite with large exposed surface areas was synthesized, which improved the sensitivity and stability for dopamine detection. The low oxidation peak potential for dopamine, 0.04 V vs. SCE, indicats that glutathione can realize the electrooxidation of dopamine at lower potential in alkaline environment. In this study, by introducing glutathione to inhibit the dopamine polymerization, sensitive and stable detection of dopamine can be achieved at pH 8.5 based on the Ag 2 Se/MoSe 2 /GCE.
研究领域:
分析化学
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神经科学
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电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Jinqi Xie,Meng Han,Xiangliang Zeng,Dasha Mao,Haitong Li,Xiaoliang Zeng,Ruiheng Liu,Linlin Ren,Rong Sun,Jianbin Xu
Flexible thermoelectric (TE) devices have great potential in wearable electronics, but there is great challenge to realize robust TE device with high performance via feasible integration process. Herein, based on precisely printed copper patterns, a flexible p Cu 2 Se- n Ag 2 Se TE device is initially realized by in situ ion exchange reaction. The as-prepared Cu 2 Se and Ag 2 Se films possess typical hierarchical defects including atomic scale vacancies, the nanosheet fragments and microscale porous structure, which could significantly scatter phonons in wide frequency range. Accordingly, ultra-low thermal conductivity (Cu 2 Se: 0.13 W m −1 K −1 ; Ag 2 Se: 0.15 W m −1 K −1 ) and optimal ZTs (Cu 2 Se: 0.5; Ag 2 Se: 0.7) are achieved. Meanwhile, the as-fabricated p Cu 2 Se- n Ag 2 Se TE device exhibits an excellent power density of 13.4 W m −2 at a temperature gradient of 40 K, which is among the highest values of printed in-plane film devices. Furthermore, the good adhesion between TE films and porous PI substrate endowed excellent flexibility and stability of p Cu 2 Se- n Ag 2 Se devices.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 8
·2042
·
IF 5.076
Dan Liu,Yaxin Zhao,Zhuqing Yan,Zhidong Zhang,Yanjun Zhang,Peng Shi,Chenyang Xue
In recent years, the preparation of flexible thermoelectric generators by screen printing has attracted wide attention due to easy processing and high-volume production. In this work, we propose an n-type Ag2Se/polymer polyvinylpyrrolidone (PVP) film based on screen printing and investigate the effect of PVP on thermoelectric performance by varying the ratio of PVP. When the content ratio of Ag2Se to PVP is 30:1, i.e., PI30, the fabricated PI30 film has the best thermoelectric property. The maximum power factor (PF) of the PI30 is 4.3 μW·m−1·K−2, and conductivity reaches 81% of its initial value at 1500 bending cycles. Then, the film thermoelectric generator (F-TEG) fabricated by PI30 is tested for practical application; the output voltage and the maximum output power are 21.6 mV and 233.3 nW at the temperature difference of 40 K, respectively. This work demonstrates that the use of PVP combined with screen printing to prepare F-TEG is a simple and rapid method, which provides an efficient preparation solution for the development of environmentally friendly and wearable flexible thermoelectric devices.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
ACS Nano
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2025
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IF 16
Yongshuai Yao,Zhihui Wang,Xiaoquan Huang,Tingting Wei,Na Liu,Lingyue Zou,Yiru Niu,Yuanyuan Hu,Qing Fang,Xiaoli Wang,Dong Qiao,Congcong Li,Min Chen,Shujing Guan,Yuying Xue,Tianshu Wu,Ting Zhang,Meng Tang
Silver selenide quantum dots (Ag2Se QDs) show great advantages in tumor imaging due to their excellent optical performance and good biocompatibility. However, the ultrasmall particle size of Ag2Se QDs allows them to cross the blood–brain barrier, thus potentially affecting the central nervous system. Therefore, risk assessment and response strategies for Ag2Se QDs are important. The adverse outcome pathway (AOP) framework makes it possible to develop risk management strategies based on toxicity mechanisms. In this study, using the AOP framework, we constructed causal mechanism relationship diagrams at different biological levels of Ag2Se QD neurotoxicity. In this framework, excess mitochondrial reactive oxygen species (mtROS) triggered Nod-like receptor protein 3 (NLRP3) inflammasome activation in microglia was molecular initiation event (MIE). Proinflammatory mediator secretion and microglia activation were key events (KEs) at the cellular level. Neuroinflammation and neuronal damage were KEs at the organ/tissue level. Altered hippocampal physiology was the adverse outcome (AO) at the individual level. Based on the established AOP framework, further studies confirmed that mtROS-activated nuclear-factor-E2-related factor 2 (Nrf2)/PTEN-induced kinase 1 (PINK1)- mitophagy contributed to weaken the MIE. Molecular docking-assisted molecular biology experiments demonstrated that quercetin (Qu) enhanced this process. This article emphasizes the importance of the AOP in the risk management of nanomaterials. Furthermore, this paper guides the use of natural small-molecule drugs as a strategy to mitigate nanomaterial-induced neurotoxicity.
研究领域:
毒理学
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纳米生物学
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神经科学
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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）