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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Sensors and Materials, Volume 20, Number 7 (2009)
Copyright(C) MYU K.K.
pp. 373-380
S&M734 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2009.574
Published: February 2, 2009

Structure and Haemocompatibility of Tetrahedral Amorphous Carbon Films Prepared by Pulsed Laser Ablation [PDF]

Min Chen, Zhanyun Huang, Lin Zhang, Dihu Chen and Aixiang Wei

(Received August 1, 2008; Accepted November 18, 2008)

Keywords: tetrahedral carbon films, Raman spectrum, haemocompatibility, pulsed laser deposition

In this paper, we describe a thermal-type blood flow microsensor that is inserted in a blood vessel and used to detect the flow rate change caused by a thrombus. The sensor is based on a Ti microneedle, on which a Pt microheater and a Pt-Au microthermocouple are formed. The microneedle was fabricated from a Ti sheet of 50 μm thickness by electrochemical etching and chemical etching in succession. The characteristics of the fabricated sensor were evaluated in flows of water and a viscous fluid in an artificial flow channel 1.2 mm in diameter. At a safe heating level (≤ 42°C), the sensor could measure a flow velocity of up to several cm/s. The sensor has high sensitivity in the flow velocity range of 0–1 cm/s, indicating that it can detect the blood flow reduction due to a thrombus in a vein.

Corresponding author: Takashi Mineta


Cite this article
Min Chen, Zhanyun Huang, Lin Zhang, Dihu Chen and Aixiang Wei, Structure and Haemocompatibility of Tetrahedral Amorphous Carbon Films Prepared by Pulsed Laser Ablation, Sens. Mater., Vol. 20, No. 7, 2009, p. 373-380.



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