Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/154646
Title: Electrochemical system encapsulated by nanoscale liposomes enabling on-demand triggering of electroless deposition at selected areas
Authors: Zhan, Jing
Lin, Ming
Arai, Satoshi
Yang, Wan Wei
Sou, Keitaro
Sato, Hirotaka
Keywords: Engineering::Mechanical engineering
Issue Date: 2020
Source: Zhan, J., Lin, M., Arai, S., Yang, W. W., Sou, K. & Sato, H. (2020). Electrochemical system encapsulated by nanoscale liposomes enabling on-demand triggering of electroless deposition at selected areas. ACS Applied Nano Materials, 3(6), 5098-5106. https://dx.doi.org/10.1021/acsanm.0c00366
Project: MOE2017-T2-2-067
NGF-2018-05-017
Journal: ACS Applied Nano Materials
Abstract: This study proposed and demonstrated an application for nanoscale thermosensitive liposomes: encapsulating chemicals (reducing agents or metal ions) to physically separate reducing agents from metal ions and temporarily prevent spontaneous reduction of the metal ion (i.e., deposition of the metal or electroless deposition). With such an electrochemical system encapsulated by nanoscale liposomes, we can trigger electroless deposition at areas of interest by heating on demand, which enables metallization at selected surface areas. We used 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) as the lipid to synthesize thermosensitive liposomes (gel-to-liquid-crystalline phase transition temperature at 40 °C) encapsulating hypophosphite (the reducing agent),and mixed it with a PdCl2 solution. The liposomes stably held the reducing agent for 160 days as long as it was stored in a fridge at 3 °C. When the temperature exceeded the phase transition temperature, the reducing agent was released from the liposomes and induced Pd deposition. This electroless deposition system encapsulated by thermosensitive liposomes was applied to metalize selected spots of the internal surface of a glass capillary tube: the mixture was injected into the tube and several spots were heated externally, and Pd metal was deposited at the spots. Furthermore, we succeeded in microscopically visualizing a single liposome thermally releasing the reducing agent and inducing metal deposition locally. Overall, on-demand triggering of electroless deposition can be accomplished by applying thermosensitive liposomes was demonstrated to be feasible. This new electrochemical system using nanoscale liposomes can be used to achieve metal coatings on various surfaces of interest.
URI: https://hdl.handle.net/10356/154646
ISSN: 2574-0970
DOI: 10.1021/acsanm.0c00366
Rights: © 2020 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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