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The set-up of a high temperature superconductor radio-frequency SQUID microscope for magnetic nanoparticle detection
, Article Superconductor Science and Technology ; Volume 19, Issue 5 , 2006 , Pages S261-S265 ; 09532048 (ISSN) ; Krause, H. J ; Banzet, M ; Lomparski, D ; Schubert, J ; Zander, W ; Zhang, Y ; Akram, R ; Fardmanesh, M ; Sharif University of Technology
2006
Abstract
SQUID (superconducting quantum interference device) microscopes are versatile instruments for biosensing applications, in particular for magnetic nanoparticle detection in immunoassay experiments. We are developing a SQUID microscope based on an HTS rf SQUID magnetometer sensor with a substrate resonator. For the cryogenic set-up, a configuration was realized in which the cryostat is continuously refilled and kept at a constant liquid nitrogen level by an isolated tube connection to a large liquid nitrogen reservoir. The SQUID is mounted on top of a sapphire finger, connected to the inner vessel of the stainless steel cryostat. The vacuum gap between the cold SQUID and room temperature...