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Zhang F, Wang F, Li Y, Yuan L, Fan L, Zhou X, Wu H, Zhu X, Wang H, Gu N. Real-Time Cell Temperature Fluctuation Monitoring System Using Precision Pt Sensors Coated with Low Thermal Capacity, Low Thermal Resistance, and Self-Assembled Multilayer Films. ACS Sens 2023; 8:141-149. [PMID: 36640268 DOI: 10.1021/acssensors.2c01848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Real-time monitoring of cell temperature fluctuation can help researchers better understand physiological phenomena and the effects of drug treatment on cells, which is a novel and important tool for cellular informatics. The platinum (Pt) temperature sensor is widely used in temperature measurement with the advantages of strong stability, great accuracy, and high sensitivity. However, the commercially available Pt sensors have large thermal resistance and heat capacity which are difficult to be applied for cell temperature measurement because only a very small amount of heat flux is generated by live cells. In this study, we designed a system using precision Pt thin-film temperature sensors with low heat capacity and thermal resistance. The Pt thin-film sensors are covered by a silicon nitride insulation layer grafted with a self-assembled multilayer silane film for promoting cell adhesion. The temperature coefficient of resistance of the Pt temperature sensor was about 2100 ppm/°C. The four-wire lead design next to the sensor detection area ensured maximum accuracy, resulting in a system noise below 0.01 °C over a long time. HEK-293T and HeLa cells were cultured on the sensor surface, respectively. The temperature fluctuation of 293T cells was monitored in a cell culture medium, showing a temperature increase of about 0.05-0.12 °C. The temperature fluctuation of HeLa cells treated with cisplatin was also measured and recorded, indicating a temperature decrease of 0.01 °C first and then a gradual temperature increase of 0.04 °C. The Pt sensor system we developed demonstrated high sensitivity and long stability for cell temperature fluctuation monitoring, which can be widely used in cell activity and cellular informatics studies.
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Affiliation(s)
- Fangzhou Zhang
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing210096, China.,Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou215123, China
| | - Fangxu Wang
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing210096, China
| | - Yan Li
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing210096, China
| | - Lihua Yuan
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou215123, China
| | - Li Fan
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou215123, China
| | - Xiaojin Zhou
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing210096, China
| | - Huijuan Wu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou215123, China
| | - Xingyue Zhu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou215123, China
| | - Hong Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou215123, China
| | - Ning Gu
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing210096, China
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Yang N, Xu J, Wang F, Yang F, Han D, Xu S. Thermal Probing Techniques for a Single Live Cell. SENSORS 2022; 22:s22145093. [PMID: 35890773 PMCID: PMC9317922 DOI: 10.3390/s22145093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/02/2022] [Accepted: 07/03/2022] [Indexed: 02/01/2023]
Abstract
Temperature is a significant factor in determining and characterizing cellular metabolism and other biochemical activities. In this study, we provide a brief overview of two important technologies used to monitor the local temperatures of individual living cells: fluorescence nano-thermometry and an array of micro-/nano-sized thin-film thermocouples. We explain some key technical issues that must be addressed and optimised for further practical applications, such as in cell biology, drug selection, and novel antitumor therapy. We also offer a method for combining them into a hybrid measuring system.
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Affiliation(s)
- Nana Yang
- School of Microelectronics, Shandong University, Jinan 250100, China; (N.Y.); (F.W.)
- School of Electronics, Peking University, Beijing 100871, China; (F.Y.); (D.H.); (S.X.)
| | - Jingjing Xu
- School of Electronics, Peking University, Beijing 100871, China; (F.Y.); (D.H.); (S.X.)
- Correspondence:
| | - Fan Wang
- School of Microelectronics, Shandong University, Jinan 250100, China; (N.Y.); (F.W.)
| | - Fan Yang
- School of Electronics, Peking University, Beijing 100871, China; (F.Y.); (D.H.); (S.X.)
| | - Danhong Han
- School of Electronics, Peking University, Beijing 100871, China; (F.Y.); (D.H.); (S.X.)
- Beijing Research Institute of Mechanical Equipment, Beijing 100854, China
| | - Shengyong Xu
- School of Electronics, Peking University, Beijing 100871, China; (F.Y.); (D.H.); (S.X.)
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