2026-04-13T05:57:56Zhttps://recercat.cat/oai/requestoai:recercat.cat:11351/96912025-10-24T10:59:28Zcom_2072_451665com_2072_378040col_2072_451666
RECERCAT
author
Jofre, Marc
author
Romeu, Jordi
author
JOFRE-ROCA, Lluis
2025-10-24T10:59:28Z
2025-10-24T10:59:28Z
2023-06-08T10:37:12Z2023-06-08T10:37:12Z2023-01-30
http://hdl.handle.net/11351/9691
Droplets; Magnetometry; MicrofluidicsGotetes; Magnetometria; MicrofluídicaGotitas; Magnetometría; MicrofluidosQuantum sensors provide unprecedented magnetic field detection sensitivities, enabling these to extend the common magnetometry range of applications and environments of operation. In this framework, many applications also require high spatial resolution magnetic measurements for biomedical research, environmental monitoring and industrial production. In this regard, optically pumped magnetometers (OPMs) are considered as prominent candidates, but are impaired in size with micrometer scale magnetic particles, e.g. magnetic droplets. In order to address this limitation, here we study the effects of adding a micrometer-to-millimeter magnetic guide to a miniature OPM. This device is applied to detect Fe3O4 magnetic droplets flowing at rates up to 25
drop. s−1 in a microfluidic channel. The computed spatial resolution is 300 µm and the measured signal-to-noise ratio is larger than 15 dB for the different sizes of considered magnetic droplets.
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess
Detectors
Magnetòmetres
Geofísica
ANALYTICAL, DIAGNOSTIC AND THERAPEUTIC TECHNIQUES, AND EQUIPMENT::Investigative Techniques::Magnetometry
ANALYTICAL, DIAGNOSTIC AND THERAPEUTIC TECHNIQUES, AND EQUIPMENT::Investigative Techniques::Rheology::Microfluidics
DISCIPLINES AND OCCUPATIONS::Natural Science Disciplines::Science::Research::Biomedical Research
TÉCNICAS Y EQUIPOS ANALÍTICOS, DIAGNÓSTICOS Y TERAPÉUTICOS::técnicas de investigación::magnetometría
TÉCNICAS Y EQUIPOS ANALÍTICOS, DIAGNÓSTICOS Y TERAPÉUTICOS::técnicas de investigación::reología::microfluídica
DISCIPLINAS Y OCUPACIONES::disciplinas de las ciencias naturales::ciencia::investigación::investigación biomédica
Optically pumped magnetometer with high spatial resolution magnetic guide for the detection of magnetic droplets in a microfluidic channel
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion