Fabrication of localized surface plasmon resonance sensors with scalable polyvinyltetrazole/copper cluster hybrid ring-array for Cu(II) detection

doi:10.1016/j.talanta.2023.124282

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Title:	Fabrication of localized surface plasmon resonance sensors with scalable polyvinyltetrazole/copper cluster hybrid ring-array for Cu(II) detection
Authors:	Chen, Jem-Kun Zeng, Xiang-Yun Cheng, Chih-Chia Chen, Chih-Wei
Contributors:	Natl Taiwan Univ Sci & Technol, Dept Mat & Sci Engn Natl Taiwan Univ Sci & Technol, Grad Inst Appl Sci & Technol, Adv Membrane Mat Res Ctr Chia Nan Univ Pharm & Sci, Inst Ind Safety & Disaster Prevent, Coll Sustainable Environm, Dept Occupat Safety & Hlth Chi Mei Med Ctr, Dept Surg, Div Neurosurg
Keywords:	Copper rings Polyvinyltetrazole brushes Ion sensors
Date:	2023
Issue Date:	2024-12-25 11:04:43 (UTC+8)
Publisher:	ELSEVIER
Abstract:	The bottom of a hole-array photoresist template deposited with a hydrophobic atom-transfer radical polymerization (ATRP) initiator was wetted by treatment with oxygen plasma. After the removal of the photoresist template, ring patterns of the ATRP initiator were formed at the interface between the hydrophobic and wetting regions. Polyacrylonitrile (PAN) was grafted from the initiator ring array to covert to polyvinyltetrazole (PVT) rings via a cyano-to-tetrazole reaction, which could adsorb Cu(II) at various concentrations. The Cu(II) ions within the PVT rings were reduced to form a PVT-copper hybrid ring (VCHR), resulting in a blue-shift of the localized surface plasmon resonance (LSPR) peak as the Cu(II) was adsorbed by the PVT rings. The blue-shift and Cu(II) concentration were linearly correlated, with a detection limit of similar to 25 pg mL(-1) and a linear range of 25-400 pg mL(-1) for Cu(II) detection. Although the PVT rings also chelated Pb(II) and Cr(III), these ions did not exhibit obvious LSPR peaks. The VCHR LSPR sensor exhibited excellent selectivity for Cu(II) detection. Combining lithography and plasma technology provides a versatile platform for developing the scalable ring structure of copper for highly sensitive and selective Cu(II) sensing.
Relation:	Talanta, v.256, Article 124282
Appears in Collections:	[Offices] 456

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