ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Fang Jia,Ruili Wu,Chan Liu,Jinle Lan,Yuan-Hua Lin,Xiaoping Yang
Recently, aerogels have been considered as hopeful thermoelectric (TE) materials because of their unique ultralow thermal conductivity compared to conventional bulk/film materials. However, their electrical conductivity cannot meet the requirement of good TE materials due to their highly porous feature. Herein, we composited poly(3,4-theylenedioxythiophene) (PEDOT) with SWCNT and bacterial cellulose (BC) to synthesize nanoporous PEDOT/SWCNT/BC films that can achieve high electrical and low thermal conductivity simultaneously by post-processing of their hybrid aerogels. A relatively high electrical conductivity of 290.6 S/cm and a low thermal conductivity of 0.13 W m–1 K–1 have been achieved for free-standing PEDOT/SWCNT/BC-32% film at room temperature. Furthermore, the films show an outstanding flexibility and fracture strength of 1.6 MPa and an elongation at break of 2.13%. The unique advantages of excellent flexibility and high electrical conductivity as well as low thermal conductivity make PEDOT/SWCNT/BC films have broad prospects in wearable thermoelectric applications.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Yi Yu,QingYi Zhu,Feifan Xiang,Yue Hu,Lijie Zhang,Xiangju Xu,Nannan Liu,Shaoming Huang
AuNPs/SWCNT, a hybrid nanomaterial which is single-walled carbon nanotube (SWCNT) modified with gold nanoparticles (AuNPs), has great application prospects for chemical and biological sensors. For the innate nanogap between tiny AuNPs deposited on sidewall of SWCNT, AuNPs/SWCNT is suitable for the fabrication of simple and effective electrical signal switching devices. Here, we develop a novel strategy of applying AuNPs/SWCNT to fabricate nanogap device for DNA hybridization detection. The detection strategy is based on the target DNA mediating the catalytic activity of the AuNPs by desorbing the probe DNA from AuNPs. The signal transduction depends on the growth of tiny AuNPs which is closely related to the AuNPs catalytic activity. Sensing occurs at the tiny AuNPs growing and connecting into a continuous nanowire along the SWCNT, leading to a conductimetric response. The biosensing device can detect target DNA with the detection limit of 1 pM and the ability to discriminate triple and quintuple base pair mismatches.
研究领域:
生物传感器
·
纳米技术
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2020
·
IF 3.233
Dalin Sun,Xintong Xu,Jiaqi Chen,Wentao Shi,Lang Sun,Shaowen Chu,Shuangchen Ruan
An all-fiber passively Q-switched ytterbium-doped fiber laser (YDFL) was successfully achieved by using a single-walled carbon nanotube (SWCNT) as a saturable absorber (SA). The SWCNT was fabricated by pyrolyzing tripropylamine in the one-dimensional channel of zeolite single crystal (ZnAPO-5, framework type code: AFI). Zn 2+ metal cations were doped to promote the filling density and quality of the SWCNT. Subsequently, by incorporating the SA into an YDFL ring cavity, a stable Q-switched pulse train at 1039.4 nm with a repetition rate of 54.28 kHz was obtained when the pump power elevated to the starting threshold of 245 mW. It proved that this SWCNT@AFI SA can be used as an effective passively Q-switched for operation at 1.0 µm region.
研究领域:
光学
·
光子学
·
激光物理
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Peng Yang,Xin Xi,Tao Huang,Qianqian Zhong,Biao Jiang,Ruili Liu,Dongqing Wu
An acid-assisted vacuum filtration approach is developed in this work to fabricate perylene diimide (PDI) and single wall carbon nanotube (SWCNT) based organic lithium ion battery (LIB) cathodes by using concentrated sulfuric acid (H 2 SO 4 ) as the solvent. PDI and SWCNT can be readily dispersed in H 2 SO 4 by the protonation of their aromatic frameworks, thus rendering the effective combination of them in the acidic solution. The resulting PDI/SWCNT films are highly appealing flexible cathodes for LIBs by associating the intriguing electrochemical activity of PDI with the excellent electric conductivity and mechanical stability of SWCNT. Either with lithium foils or pre-lithiated carbon clothes as the anodes, the LIBs with PDI/SWCNT cathodes can deliver highly stable electrochemical performances in terms of rate capability and cycling stability. The PDI/SWCNT cathodes also have very good mechanical stability, enabling the LIBs based on them to reserve the battery performances at different bending states. The excellent electrochemical stability of the PDI/SWCNT cathodes is attributable to the acidic solution based processing method, which is expected to be expanded in the electrode fabrication of various organic secondary batteries with π-conjugated components.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jing Liu,Yan Ping Chen,Penglin He,Ziyu Ding,Yun Guo,Songhe Cui,Chao Ma,Zhiping Xie,Sun Xia,Yin Zhang,Ye Liu,Yuan Liu
Hexanal is considered as an important volatile compound indicator for the assessment of freshness and maturity of foods. Therefore, sensitive and stable monitoring of hexanal is highly desired. Herein, an efficient receptor immobilization strategy based on ZIF-8@ Single-walled carbon nanotube (SWCNT) and nanosomes-AuNPs/Prussian blue (PB) was proposed for the development of olfactory biosensors. ZIF-8@SWCNT as dual support materials provided a high density of active sites for nanosomes loading. Moreover, the co-electrodeposition of nanosomes-AuNPs and PB on the sensor interface effectively amplified the electrochemical signal and maintained the activity of the receptor. The combination of ZIF-8@SWCNT with AuNPs/PB imparts excellent sensing performance of the biosensor with a wide detection range of 10 −16 –10 −9 M, a low detection limit of 10 −16 M for hexanal, and a long storage stability of 15 days. These results indicate that our biosensor can be a powerful tool for versatile applications in food and other related industries.
研究领域:
食品科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shasha Wei,Yichuan Zhang,Haicai Lv,Liang Deng,Guangming Chen
Although conjugated polymer/carbon nanotube (CNT) thermoelectric (TE) composites have witnessed explosive achievements in recent years, the in-depth mechanism of CNT network evolution and its influence on composite TE performance are still unclear. Herein, we systematically investigate the evolution of single-walled CNT (SWCNT) network structure with a wide SWCNT content range for poly (3,4-ethyienedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/SWCNT composites based on TE properties and atomic force microscopic (AFM) observations. The whole curves of TE performance can be divided into three regions with the increase of SWCNT loading. In Region I (< 20 wt% SWCNT), a percolation-like phenomenon is observed with an S-shape change of electrical conductivity and constant Seebeck coefficient, possibly due to the occurrence of SWCNT aggregates besides primary particles. Subsequently, because of energy-filtering effect, in Region II (SWCNT content between 20 wt% and 97.5 wt%), the electrical conductivity decreases, while the Seebeck coefficient gradually increases with increased SWCNT loading. With further increase of SWCNT content (Region III), the TE performances are almost independent of SWCNT content. In addition, the temperature dependence of TE performance and the stability of TE performance against mechanical bending cycles are studied. Finally, a prototype TE device based on PEDOT:PSS/SWCNT composite film is assembled, showing an open-circuit voltage and an output power of 6.6 mV and 1200 nW at a temperature difference of 60 K, respectively. The results are helpful to elucidate the mechanism of structure–property relations for conjugated polymer TE composites, and will benefit their practical applications.
研究领域:
材料科学
·
纳米技术
·
热电学
·
聚合物复合材料
·
能量转换
✓ 已验证
DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 5
·1640
·
IF 3.4
Zhangling Li,Tong Guan,Wuxu Zhang,Jinyun Liu,Ziyin Xiang,Zhiyi Gao,Jing He,Jun Ding,Baoru Bian,Xiaohui Yi,Yuanzhao Wu,Yiwei Liu,Jie Shang,Runwei Li
Elastic pressure sensors play a crucial role in the digital economy, such as in health care systems and human–machine interfacing. However, the low sensitivity of these sensors restricts their further development and wider application prospects. This issue can be resolved by introducing microstructures in flexible pressure-sensitive materials as a common method to improve their sensitivity. However, complex processes limit such strategies. Herein, a cost-effective and simple process was developed for manufacturing surface microstructures of flexible pressure-sensitive films. The strategy involved the combination of MXene–single-walled carbon nanotubes (SWCNT) with mass-produced Polydimethylsiloxane (PDMS) microspheres to form advanced microstructures. Next, the conductive silica gel films with pitted microstructures were obtained through a 3D-printed mold as flexible electrodes, and assembled into flexible resistive pressure sensors. The sensor exhibited a sensitivity reaching 2.6 kPa−1with a short response time of 56 ms and a detection limit of 5.1 Pa. The sensor also displayed good cyclic stability and time stability, offering promising features for human health monitoring applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Weifeng Wang,Rui Zhang,Shaowei Lu,Ying Wang,Keming Ma,Lu Zhang,Chengkun Ma
Carbon nanocomposite sensors have great potential in structural health monitoring research for protecting material integrity and maintaining stable performance. However, the application of carbon nanocomposite sensors is limited by the poor dispersion of carbon nanotubes (CNTs), which results in high CNT penetration threshold and low processability of carbon nanocomposite sensors. Therefore, there is an urgent requirement for improving the dispersibility of CNTs to achieve efficient enhancement of carbon nanocomposite sensors. This work reports a highly sensitive and linear single-walled carbon nanotube (SWCNT)/epoxy resin (EP) sensor for structural health monitoring of composite materials using screen-printing process. Based on the favorable dispersibility of SWCNTs, the percolation threshold of SWCNTs in the sensor is merely 0.022 wt%, which is substantially lower than that in other studies. Moreover, the sensing properties are superior to those of other investigations. The sensor exhibits a remarkably high Gauge Factor (GF) of 17.3, indicating its exceptional reliability and consistency. Furthermore, the response/recovery times of 166/210 ms, respectively, under micro strain (ε<2 %), demonstrating its outstanding performance under minimal stress conditions. It also demonstrates a high linear response to temperature (R 2 = 0.99) and a GF of −5.0 × 10 −4 °C −1 . Impact tests on the sensor array of aircraft wall panels have validated the feasibility of SWCNT/EP sensors for impact localization and damage monitoring. These SWCNT/EP sensors with ultra-low SWCNT content hold great potential and broad application prospects in structural health monitoring, being anticipated to accurately conduct material damage assessment and structural integrity evaluation.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Yingshiyu Lin,Lingbo Liu,Gaozhi Ou,Wensheng Huang,Kangbing Wu
Salbutamol (SAL), a drug originally intended for the treatment of bronchial and pulmonary diseases, has repeatedly been used for doping in competitive sports. Herein, an integrated array (NFCNT array) that prepared by template-assisted scalable filtration using Nafion-coated single-walled carbon nanotube (SWCNT) is presented for the rapid field detection of SAL. Spectroscopic and microscopic measurements were used to confirm the introduction of Nafion onto the surface of the array and to analyze the resulting morphological changes. The effects of Nafion addition on the resistance and electrochemical properties of the arrays (e.g., the electrochemically active area, charge-transfer resistance, and adsorption charge) are also discussed in depth. With an electrolyte/Nafion/SWCNT interface and moderate resistance, the NFCNT-4 array prepared containing 0.04 wt% Nafion suspension exhibits the greatest voltammetric response to SAL. Subsequently, a possible mechanism for the oxidation of SAL was proposed, and a calibration curve in the range of 0.1–15 μM was established. Finally, the NFCNT-4 arrays were applied to the detection of SAL in human urine samples with satisfactory recoveries.
研究领域:
分析化学
·
药物检测
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 46
·26011-26019
·
IF 2.936
Ruili Wu,Haocheng Yuan,Chan Liu,Jin-Le Lan,Xiaoping Yang,Yuan-Hua Lin
The effects of polyaniline (PANI) with different polymerization times on the film-forming and thermoelectric properties as well as on the performance of SWCNTs/PANI composites were systematically investigated in this study. It was found that the film-forming and flexibility of PANI films improved with the increase in polymerization time. We showed that a super high conductivity of ∼4000 S cm−1 can be achieved for the SWCNTs/PANI composite film, which is the highest value for the SWCNTs/PANI system at present. Both the electrical conductivity and power factor increase by an order of magnitude than that of pure PANI films and far exceed the theoretical value of the mixture model. These results suggest that the sufficiently continuous and ordered regions on the interlayer between the filler and matrix are key to improve the electrical conductivity of composites. Finally, the maximum PF reaches 100 μW m−1 K−2 at 410 K for the 0.6CNT/PANI5h. Furthermore, it is found that the composite films have excellent environmental and structural stability. Our results can deepen the understanding of organic–inorganic thermoelectric composite systems and facilitate the practical application of flexible and wearable thermoelectric materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 3
·780-790
·
IF 3.069
Hui Zhao,Wenming Geng,Wei-Wei Cao,Jian-Gong Wen,Tao Wang,Ying Tian,Li-Chao Jing,Xiao-Tong Yuan,Ze-Ru Zhu,Hong-Zhang Geng
Carbon nanotubes (CNTs) and graphene oxide (GO) were sprayed on flexible polyethylene terephthalate (PET) substrates to prepare CNT and GO–CNT transparent conductive films (TCFs). For the GO–CNT TCFs, when the mass ratio of GO to CNTs was 0.2, a relatively low sheet resistance of 90.4 Ω sq−1 at a transmittance of 87% (550 nm) was obtained with an average σdc/σopt value of 28.9. Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) solution without or with ethylene glycol (EG) added was sprayed on the surface of the GO–CNT films to obtain P/GO–CNT and P(E)/GO–CNT films, respectively. P(E)/GO–CNT films were post-treated with sulfuric acid to obtain P(E,S)/GO–CNT TCFs. The addition of PEDOT:PSS can permeate into the pores of networks and densify the GO–CNT networks, increasing the conductivity and wettability and decreasing the roughness of the films. Additional EG can reduce the Coulomb force between PEDOT and PSS and change the morphology of PEDOT, and at the same time sulfuric acid treatment can effectively remove PSS from the PEDOT:PSS layer. The P(E,S)/GO–CNT 0.2 TCFs exhibited a sheet resistance of 46.3 Ω sq−1 at a transmittance of 87.5% (550 nm) with an average σdc/σopt value of 56.1. The organic light emitting diodes were successfully fabricated, and the mechanism of how the electrical conductivity of the hybrid film increased was also investigated.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 12
·e70005
·
IF 3.1
Ming Jiang,Haili Zhao,Tao Chen,Guangming Li
Porous biodegradable polybutylene adipate terephthalate (PBAT)-based material, used in wearable electronics for sensing human motion, is beneficial for environmental protection. Although PBAT demonstrates good elongation at break and impact performance, specific studies on its processing, modification, and porous structure are needed. Therefore, PBAT/single-walled carbon nanotube (SWCNT) porous material was prepared via a salt-templating method. It was found that part of the SWCNT was embedded in the walls of the pores in the PBAT substrate, while another part was exposed on the pore surface. PBAT served as the structural framework, and SWCNT functioned mainly as the active component, especially the SWCNT exposed on the surface. This unique microstructure imparted the porous material with desirable piezoresistive properties and effective electromagnetic interference (EMI) shielding capabilities. When the material was compressed, the exposed SWCNT was forced into closer contact, increasing the number of electrical transport pathways and further enhancing conductivity. The resulting porous sensor exhibited a notable response to strain up to 100% and demonstrated high sensitivity (1.25) while maintaining robust cyclic stability after 1000 cycles. Human pulse and finger flexion were successfully recorded using the fabricated porous sensor. Moreover, the porous material displayed EMI shielding capabilities, primarily through the absorption of electromagnetic (EM) waves, a phenomenon associated with the rough surface of the pores created by the exposed SWCNT. The overall electromagnetic shielding effectiveness was around 60 dB. Given these advantages, the green biodegradable material PBAT shows significant potential for application in piezoresistive sensors and electromagnetic interference shielding with appropriate modification and preparation.
研究领域:
材料科学
·
环境科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）