title: Mapping three-dimensional temperature in microfluidic chip.
abstract: Three-dimensional (3D) temperature mapping method with high spatial resolution and acquisition rate is of vital importance in evaluating thermal processes in micro-environment. We have synthesized a new temperature-sensitive functional material (Rhodamine B functionalized Polydimethylsiloxane). By performing optical sectioning of this material, we established an advanced method for visualizing the micro-scale 3D thermal distribution inside microfluidic chip with down to 10 ms temporal resolution and 2 ~ 6 °C temperature resolution depending the capture parameters. This method is successfully applied to monitor the local temperature variation throughout micro-droplet heat transfer process and further reveal exothermic nanoliter droplet reactions to be unique and milder than bench-top experiment.
authors.affiliation: Department of Physics, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
authors.forename: Jinbo
authors.initials: J
authors.lastname: Wu
authors.forename: Tsz Yan
authors.initials: TY
authors.lastname: Kwok
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Li
authors.forename: Wenbin
authors.initials: W
authors.lastname: Cao
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Junying
authors.initials: J
authors.lastname: Huang
authors.forename: Yaying
authors.initials: Y
authors.lastname: Hong
authors.forename: Dongen
authors.initials: D
authors.lastname: Zhang
authors.forename: Weijia
authors.initials: W
authors.lastname: Wen