title: Mapping electric fields generated by microelectrodes using optically trapped charged microspheres.
abstract: In this work, we show a new technique to measure the direction and amplitude of the electric field generated by microelectrodes in a liquid environment, as often used in microfluidic devices. The method is based on the use of optical tweezers as a force transducer. A trapped, charged particle behaves as a probe. With this technique, it is possible to obtain a detailed map of the electric field, even for very complex electrode structures with a resolution below a micrometre and with a sensitivity as low as a few hundreds of V m(-1).
authors: Dipartimento di Scienze Fisiche, Università di Napoli Federico II and CNISM (Consorzio Interuniversitario per le Scienze Fisiche della Materia) Napoli, Italy. giuseppe.pesce@na.infn.it
authors: Giuseppe
authors: G
authors: Pesce
authors: Biagio
authors: B
authors: Mandracchia
authors: Emanuele
authors: E
authors: Orabona
authors: Giulia
authors: G
authors: Rusciano
authors: Luca
authors: L
authors: De Stefano
authors: Antonio
authors: A
authors: Sasso