ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Yuan Wang,Sen Liang,Mingliang Mei,Qiaowen Zhao,Guangwei She,Wensheng Shi,Lixuan Mu
Detecting the temperature of intracellular mitochondria with high sensitivity and stability is crucial to understanding the cellular metabolism and revealing the processes of mitochondria-related physiology. In this paper, employing the long fluorescence lifetime of modified Au nanoclusters (mAuNCs) by 4-(carboxybutyl) triphenylphosphonium bromide, we developed a fluorescence lifetime thermometer with high sensitivity and stability for the temperature of the intracellular mitochondria. A high relative temperature sensitivity of 2.8% and excellent photostability were achieved from the present thermometer. After incubation with L929 cells, the mAuNCs could be endocytosed into the cells and targeted the mitochondria, and the temperature changes at the L929 cells’ mitochondria, which were stimulated by carbonyl cyanide 3-chlorophenylhydrazone and Ca2+, were successfully detected via the fluorescence lifetime images of the mAuNCs. Furthermore, utilizing the mAuNCs, we clarified the effect of Mg2+ on the temperature of the intracellular mitochondria. The strategy of employing a material with a long fluorescence lifetime and remarkable stability to fabricate the fluorescence lifetime thermometer for mitochondria can be used to design various thermometers for other organelles.
研究领域:
生物化学
·
纳米技术
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jun Chen,Changrong Zhou,Huihui Liu,Qingning Li,Changlai Yuan,Jiwen Xu,Jiang Wang,Jingtai Zhao,Guanghui Rao
An imminent challenge of lead-free Bi0.5Na0.5TiO3-based (BNT) piezoceramics is that the giant piezoelectric constant (d33) caused by the morphotropic phase boundary is incompatible with a high depolarization temperature (Td) and ultralow temperature coefficient (Ttc) of the real-time d33, which severely hinders their industrial application in the field of elevated temperatures. Herein, a sandwich-structured 0.94Bi0.5Na0.5TiO3–0.06BaTiO3/0.89Bi0.5Na0.5TiO3–0.11BaTiO3/0.94Bi0.5Na0.5TiO3–0.06BaTiO3 (SWS-6/11/6BT-y, where y refers to the weight fraction of the BNT-11BT solid solution) ceramic composite is engineered for mitigating the conflict between d33, Td and Ttc. Following this strategy, ultrahigh Td near the Curie point (225 °C, close to that of the BNT-11BT layer) and relatively large d33 (130 pC/N, close to that of the BNT-6BT layer) are simultaneously realized in a SWS-6/11/6BT-40%-Q ceramic composite. More importantly, the ultralow Ttc (0.07%) of real-time d33 is also achieved in this work. The structural heterogeneity yields the high piezoresponse, and the built-in field resulting from layer-type ceramic composites provides the driving force to promote the diffused ferroelectric–relaxor phase transition and the resultant ferroelectric order with high Td. The above synergistic contributions realize the remission of the d33–Td–Ttc conflict in a sandwich-structural SWS-6/11/6BT-40% ceramic composite. Thus, our work provided a path for designing the BNT-based piezoceramics with potential for industrial applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Pengbin Wang,Qinghu Guo,Fei Li,Fangquan Xia,Hua Hao,Huajun Sun,Hanxing Liu,Shujun Zhang
The development of ferroelectric ceramics with both large piezoelectric responses and broad service temperature range is still a key challenge for practical applications due to the so-called d 33 - T C trade-off. Here we report the strategy to utilize the synergistic contribution of morphotropic phase boundary and enhanced local structural heterogeneity, in which an excellent piezoelectric coefficient d 33 of 680 pC/N and a high Curie temperature of 330 ℃ are simultaneously achieved in Sm modified 0.25PIN-0.325PZ-0.425PT ceramics. The underlying mechanism responsible for the high dielectric and piezoelectric properties is studied based on cryogenic dielectric measurement and Rayleigh analysis. Of particular interest is that, a high field-induced strain of 0.19% is achieved in 0.25PIN-0.32PZ-0.43PT at electric field of 20 kV/cm, corresponding to a piezoelectric d 33 * of 945 pm/V, showing an excellent temperature stability with minimal variation of 7% up to 310 °C. This work demonstrates the introduction of high temperature end members and rare earth doping are conducive to ferroelectric solid solutions with desired broad usage temperature range and superior piezoelectric properties , which will greatly benefit high temperature actuator applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
J.L. Wu,B.S. Cao,F. Lin,B.J. Chen,J.S. Sun,B. Dong
A new upconversion (UC) host material YbMoO 4 with 0–100 mol% Er 3+ doping was obtained using a facile coprecipitation method. A pure tetragonal phase of YbMoO 4 was synthesized, which was dependent on the pH value of the reaction mixture and the sintering temperature . The existence of pentavalent molybdenum was confirmed in YbMoO 4 by thermal-reduction of hexavalent molybdenum. Under a 976 nm laser diode excitation, both green and red UC emissions were observed from Er 3+ :YbMoO 4 , which corresponded to the 2 H 11/2 / 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ with the strongest luminescence appearing at a mole ratio of Er:Yb=1:10. The two-photon absorption UC process was responsible for the green and red emissions. The temperature-dependent green UC emission of Er 3+ :YbMoO 4 was observed, which was rationalized using the thermal quenching model. The fluorescence intensity ratio (FIR) of green UC emissions was studied as a function of temperature and its high thermal sensitivity implied that the Er 3+ :YbMoO 4 material is a promising prototype for applications in optical temperature sensing.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 8
·1-11
·
IF 2.426
Fu Congcong,Ding Lan,Yin Jialin,Tian Shasha,Ma Lan,Zhang Qi,Qin Fei,Cao Lili,Deng Kuilin
In this investigation, we described a facile preparation of temperature/photo dual sensitive polymers (PGABs) by Ugi four-component polymerization (Ugi-4CP) at room temperature in “one-pot” method using glutaraldehyde, 4 -amido-azobenzene, t -butyl isocyanide and carboxyl-end-capped polyethylene glycols (S-PEG) as monomers. PGABs were found to be reversibly sensitive to the temperature in salt solution, and their lower critical solution temperatures (LCST) can be tuned to the range of 17.2–68.4 °C by changing the structure of PGABs, sort and concentration of salt. The configuration transition of PGABs between cis -form and trans -form was reversibly induced by the alternating radiation at 365 and 254 nm. The rate and conversion of isomerization showed a remarkable dependence on the chemical structure of PGAB. By the photosensitivity, the LCST of PGAB-800 is further regulated in 1.0 °C change because of the hydrophilicity difference of cis - trans -azobenzene moiety. Through the combination of the thermosensitivity and photosensitivity, the particles of PGABs with nano/μm dimension were successfully controlled by the light radiation and temperature change.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Jiaqiang Liu,Weiling Huang,Zhiguo Xia,Yan Xu
Non-contact thermometry operating at the sub-micrometer level based on self-referencing upconversion (UC) micro-nanomaterial is an attractive pursuit for optical thermometers. Here, a novel accordion-like Y 2 O 3 :Er 3+ nanothermometer with green/red UC luminescence is obtained from the solvent-free grinding and the following temperature-programmed calcination of the Er 3+ -doped Y-containing metal-organic framework (MOF) precursor. Upon 980 nm laser irradiation, the as-prepared Y 2 O 3 :Er 3+ exhibits dual-emitting green and red emissions originating from Er 3+ ions with a two-photon UC process, and the intensities are strongly dependent on temperature. The optical thermometry behaviours of Y 2 O 3 :Er 3+ nanothermometer using the fluorescence intensity ratio (FIR) technique are studied in the temperature range of 298–393 K within the physiological temperature, in which the thermally coupled levels of two green emissions and another pair of coupled levels with red and green emissions are comparatively investigated. A relative large calculated energy gap Δ E (951 cm −1 ) for the thermally couple levels of 2 H 11/2 and 4 S 3/2 and a maximum absolute sensitivity ( S a ) of 0.0027 K −1 at 393 K are determined, respectively. This novel accordion-like Y 2 O 3 :Er 3+ nanothermometer exhibits excellent optical sensing stability and high temperature resolution, demonstrating its great potential as reliable and promising optical thermometers.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Zhongzheng Zhang,Nannan Sun,Wei Wei
A facile strategy for efficient synthesis of ordered mesoporous carbons (OMCs) with regular single-crystal morphology was designed, and based on this detailed effect of early dissolving temperature, hydrothermal temperature and time, and carbonization temperature on textural properties and structures of obtained single-crystal OMCs were further systematically investigated. Compared with other methods, this strategy was a simple single-step process without complicated pre-polymerization procedure, and didn’t require extremely long reaction time for the formation of single-crystal morphology. What’s more important, single-crystal morphology of OMCs, such as spherical, rhombic dodecahedral, hexagonal prismatic and cubic morphology, can be easily generated and tuned by just simply controlling the dissolving temperature, indicating an important and decisive role of dissolving temperature in determining the morphology types. In addition to the well-developed single-crystal morphology, the obtained OMCs also exhibited high surface areas, uniform pore sizes, and appreciable nitrogen contents, which make them exhibit considerable CO 2 capacities, high CO 2 /N 2 selectivity, excellent cycling stability, and a much higher specific capacity of CO 2 than some nanostructured N-doped carbons with high nitrogen content. Besides, a possible growth mechanism was also proposed based on the direct observations from the SEM images of some synthesized single-crystal OMCs.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2015
·
IF 5.636
Juan Qiao,Yoon-Ho Hwang,Chuan-Fang Chen,Li Qi,Ping Dong,Xiao-Yu Mu,Dong-Pyo Kim
Intracellular temperature has a fundamental effect on cellular events. Herein, a novel fluorescent polymer ratiometric nanothermometer has been developed based on transferrin protein-stabilized gold nanoclusters as the targeting and fluorescent ratiometric unit and the thermosensitve polymer as the temperature sensing unit. The resultant nanothermometer could feature a high and spontaneous uptake into the HeLa cells and the ratiometric temperature sensing over the physiological temperature range. Moreover, the precise temperature sensing for intracellular heat generation in HeLa cells following calcium ions stress has been achieved. This practical intracellular thermometry could eliminate the interference of the intracellular surrounding environment in cancer cells without a microinjection procedure, which is user-friendly. The prepared new nanothermometer can provide tools for unveiling the intrinsic relationship between the intracellular temperature and ion channel function.
研究领域:
生物化学
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
High Voltage
·
2022
·Vol. 8
·期 1
·1-11
·
IF 4.967
Guimin Jiang,Yuanxiang Zhou,Chenyuan Teng,Yunxiao Zhang,Xin Huang,Lei Xue,Luming Zhou
Incorporating positive temperature coefficient (PTC) ceramic particles into polymers provides a prospective alternative solution for suppressing severe electric field distortions caused by negative temperature coefficient (NTC) of electrical resistivity within polymer insulation in high voltage direct current cable. The effect of the Curie temperature of PTC particles on the inhibition of the NTC effect of cross-linked polyethylene (XLPE) is investigated in this study. Positive temperature coefficient particles with varied Curie temperatures are surface-modified and melt blending with XLPE. The modified particles are dispersed on averagely in the matrix. The electrical resistivity, space charge behaviour, and direct current (DC) electrical breakdown strength of the samples are investigated at different temperatures, exploring the effect of the Curie temperature of PTC particles on suppressing the NTC effect of XLPE. It is demonstrated that the reduction in Curie temperature can further suppress the NTC effect of XLPE, enhance the DC strength at elevated temperatures, and inhibit the internal space charge accumulation. The reduction in the Curie temperatures means that the initiation of the PTC effect advances, exhibiting a higher potential barrier and inhibiting the NTC effect more effectively. This work may give a reference for improving the temperature stability of DC properties for XLPE cable insulation.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 23
·7112
·
IF 3.623
Shiqi Chen,Xiaolong Han,Peng Hong,Yue Zhang,Xiangyu Yin,Bingwei He
Flexible sensors have attracted extensive attention because of their promising applications in the fields of health monitoring, intelligent robots, and electronic skin, etc. During the COVID-19 epidemic, noncontact control of public equipment such as elevators, game consoles, and doors has become particularly important, as it can effectively reduce the risk of cross-infection. In this work, a noncontact flexible temperature sensor is prepared via a simple dip-drying progress, in which poly(3,4-ethylenedioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) and printer paper served as the sensing material and the flexible substrate, respectively. We combined the highly sensitive temperature-responsive property of PEDOT:PSS with the good hygroscopicity of printer paper. The prepared sensor shows high sensitivity and good stability in noncontact sensing mode within the temperature range of 20–50 °C. To prove the practicability of the noncontact temperature sensor, a 3 × 2 sensing array is prepared as a noncontact human-machine interface to realize the interaction between player and “Pound-A-Mole game” and a Bluetooth car. These two demos show the sensor′s ability to perceive nearby temperature changes, verifying its application potential as a noncontact human-machine interaction interface.
研究领域:
材料科学
·
生物医学工程
·
电子皮肤
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yutong Wang,Sha Jiang,Jialiang Xie,Linlin Xie,Chuanliang Feng,Yongjie Wang,Guotao Xiang,Li Li,Yanhao Huang,Xianju Zhou,Feng Wang
Ratiometric luminescent thermometry is favored for its unique advantages and significant potential applications, particularly in the biomedical field. That has driven growing interest in the development of novel luminescent materials with ultra-high sensitivity in the physiological temperature range. Our study focuses on materials that exhibit temperature-induced phase transition within the physiological temperature range, thus facilitating the development of highly sensitive luminescent thermometers. Through a series of experimental explorations, we have discovered that LiYO 2 :1%Sm 3+ undergoes a phase transition from a monoclinic structure to a tetragonal structure within the temperature range of 320–330 K. Subsequently, a luminescent thermometer based on LiYO 2 :Sm 3+ phosphor was designed, capitalizing on the contrasting thermal response of the emissions associated with monoclinic and tetragonal structures, achieving ultra-high sensitivity of 17.51% K −1 at 322 K, making it suitable for the application in the biomedical field. Especially, the optimal temperature range for LiYO 2 : Sm 3+ thermometer aligns well with mitochondrial temperature, presenting potential applications in cancer diagnosis and photothermal therapy.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Libin Sun,Da-Wen Sun,Liang Xu,You Tian,Zhiwei Zhu
Fresh fruit and vegetables usually suffer from quality deterioration when exposed to inappropriate temperatures. Common energy-input temperature regulation is widely applied but there remain challenges of increasing energy consumption. Passive temperature management regulates the heat transfer without energy consumption, showing a sustainable strategy for food preservation. Here, thermoresponsive hydrogels were constructed by incorporating NaCl and sodium dodecyl sulfate (SDS) micelles into a poly(N-isopropylacrylamide- co -acrylamide) (P(NIPAM- co -AM)) network. Due to the excellent mechanical properties and reversible thermochromism at 14 °C and 37 °C, Gel-8 wt%-NaCl could inhibit temperature rise and avoid sunburn damage to peppers under direct sunlight by blocking the input of solar energy and accelerating moisture evaporation. Additionally, hydrogels could act as a feasible sensor by providing real-time visual warnings for inappropriate temperatures during banana storage. Based on the self-adaptive thermoresponsive behaviour, the prepared hydrogels showed effective performance of temperature regulation and quality preservation of fruit and vegetables.
研究领域:
食品科学
·
材料科学
✓ 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）