Detection of Influenza Viruses Attached to an Optical Disk

• 作者: Akihiro Yoshida Koichi Awazu Makoto Fujimaki Masashi Kuwahara Subash C. B. Gopinath Takayuki Shima Yoshimichi Ohki
• 来源期刊: 生物材料与纳米技术(英文)
• 学科: 医学
• 关键词: INFLUENZA VIRUS POLYSTYRENE BEAD Optical DISK Laser Reflectance Sensor Safety and Security
• 年，卷（期）: 2013,（2）
• 页码范围: 145-150
• 页数: 6页
• 分类号: R73

摘要

Detection of polystyrene beads with a diameter of 100 nm was conducted using an optical disk drive tester equipped with a laser of 405 nm wavelength and an objective lens with a numerical aperture of 0.65. The polystyrene beads were used to mimic the influenza virus. A grooved disk with a (ZnS)85(SiO2)15/SiO2 layered surface structure was used for the detection. The detection of influenza viruses (A/Udorn/307/1972) with Au nanoparticles was also demonstrated using the optical disk drive tester. In this case, a grooved disk with an indium tin oxide (ITO) film was used. The ITO film functioned both to tune the reflectance of the disk and as an electrically conductive layer for scanning electron microscopy. In both cases, the target substances were successfully recognized in a single scan with a high scanning speed of 4.9 m/s. The results indicate that this optical disk system can be used to detect 100 nm scale substances like influenza viruses, which are smaller than the diffraction limit of the system.