Fabrication of a Needle Microsensor and Its Applications in the Detection of Dissolved Oxygen

Fang, Yuxin; Zhang, Di; Xia, Qing; Hong, Shouhai; Xu, Yuan; Guo, Yi

doi:10.1155/2015/408458

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…Although the designed sensor was sensitive to the conductivity and permittivity change in the surrounding environment, which was usually related to the occurrence of diseases, it is not specific to different influence factors. Next, we will functionalize the upper electrode of the sensor by coating it with selective materials to specifically detect the concentrations of various ions, proteins, glucose, oxygen, and so on 44 – 49 . After the functionalized sensor is combined with the marker, the permittivity and conductivity above the sensor will change.…”

Section: Resultsmentioning

confidence: 99%

Self-sensing intelligent microrobots for noninvasive and wireless monitoring systems

Wang

Hou

et al. 2023

Microsyst Nanoeng

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Microrobots have garnered tremendous attention due to their small size, flexible movement, and potential for various in situ treatments. However, functional modification of microrobots has become crucial for their interaction with the environment, except for precise motion control. Here, a novel artificial intelligence (AI) microrobot is designed that can respond to changes in the external environment without an onboard energy supply and transmit signals wirelessly in real time. The AI microrobot can cooperate with external electromagnetic imaging equipment and enhance the local radiofrequency (RF) magnetic field to achieve a large penetration sensing depth and a high spatial resolution. The working ranges are determined by the structure of the sensor circuit, and the corresponding enhancement effect can be modulated by the conductivity and permittivity of the surrounding environment, reaching ~560 times at most. Under the control of an external magnetic field, the magnetic tail can actuate the microrobotic agent to move accurately, with great potential to realize in situ monitoring in different places in the human body, almost noninvasively, especially around potential diseases, which is of great significance for early disease discovery and accurate diagnosis. In addition, the compatible fabrication process can produce swarms of functional microrobots. The findings highlight the feasibility of the self-sensing AI microrobots for the development of in situ diagnosis or even treatment according to sensing signals.

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Section: Resultsmentioning

confidence: 99%

Self-sensing intelligent microrobots for noninvasive and wireless monitoring systems

Wang

Hou

et al. 2023

Microsyst Nanoeng

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show abstract

“…Next, we will functionalize the upper electrode of the sensor by coating it with selective materials to speci cally detect the concentrations of various ions, proteins, glucose, oxygen, and so on. [35][36][37][38][39][40] After the functionalized sensor is combined with the marker, the permittivity and conductivity above the sensor will change. Therefore, the scene in which many microrobots patrol the body under external control are navigated by MRI and actively nd abnormal parts according to the sensing signal for in-situ diagnosis and even treatment will be realized in the near future.…”

Section: Resultsmentioning

confidence: 99%

Self-sensing Intelligent Microrobots for Non-Invasive and Wireless Monitoring Systems

Zhao

Wang

et al. 2023

Preprint

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Microrobots present great potential and wide applications in in-situ treatment and attract tremendous attention due to their small size and flexible movement. However, functional modification for microrobots became more important for their interaction with the environment, except for precise motion control. Here, we design a novel artificial intelligence (AI) microrobot, which can respond to changes in the external environment without onboard energy supplying and transmit signals wirelessly in real time. The AI microrobot can cooperate with external electromagnetic imaging equipment and enhance the local radiofrequency (RF) magnetic field to achieve a large penetration sensing depth and a high spatial resolution. The working ranges are determined by the structure of the sensor circuit and the corresponding enhancement effect can be modulated by the conductivity and permittivity of the surrounding environment, reaching ~ 560 times at most. Under the control of an external magnetic field, the magnetic tail can actuate the microrobotic agent to move accurately, with great potential to realize in-situ monitoring in different places in a human body in an almost noninvasive fashion, especially around potential diseases, which is of great significance for early disease discovery and accurate diagnosis. In addition, the compatible fabrication process provides an approach to swarms of functional microrobots. The findings highlight the feasibility of the self-sensing AI microrobot for the development of in-situ diagnosis or even treatment according to the sensing signals.

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“…However, the optical method is just suitable for the measurements in the laboratory and it is hard to apply in the field application. Besides, the electrochemical technology has been widely used for DO sensor development [6][7][8]. Chou and his colleague investigated gold/ Nafion electrodes with H2SO4 acid as a supporting electrolyte for detection of DO in solvent [7].…”

Section: Introductionmentioning

confidence: 99%

Blend of Metal Oxides and Polyaniline on Platinum Electrodes for Dissolved Oxygen Sensors

Huynh

Nguyen

Doan

et al. 2021

ETJ

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In this study, we report the detection of dissolve oxygen (DO) by using a blend of Ruthenium oxide and polyaniline (PANI) coated on platinum electrodes. Optical properties of the PANI were characterized by using Ultraviolet - Visible (UV-Vis) and Fourier-transform infrared (FTIR) spectroscopy. In order to study the sensitivity of the thin films of the PANI and PANI: Ruthenium oxide blend, cyclic voltammetry (CV) measurements was performed with the platinum electrodes coated with the thin films of PANI: Ruthenium oxide. The electrolyte solutions were prepared from the phosphate buffer and had the salinity of 20‰ and pH 7.3. The CV measurements were carried out when the electrodes were put in the electrolyte solutions which had various DO concentrations by purging pure nitrogen and oxygen gases. The DO concentrations in the experiments were measured by a commercial dissolved oxygen probe. The correlation between the current in the CV measurements and DO concentrations was determined. The effect of the blending ratio of the metal oxide and PANI on the electrochemical signal was also specified. The results showed that the platinum electrodes with PANI: Ruthenium oxide blend coating exhibited a high possibility as electrochemical sensor for detection of low levels of DO in aqueous phase.

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Fabrication of a Needle Microsensor and Its Applications in the Detection of Dissolved Oxygen

Cited by 4 publications

References 30 publications

Self-sensing intelligent microrobots for noninvasive and wireless monitoring systems

Self-sensing intelligent microrobots for noninvasive and wireless monitoring systems

Self-sensing Intelligent Microrobots for Non-Invasive and Wireless Monitoring Systems

Blend of Metal Oxides and Polyaniline on Platinum Electrodes for Dissolved Oxygen Sensors

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