title: Magnetic Relaxation Switch Detecting Boric Acid or Borate Ester through One-Pot Synthesized Poly(vinyl alcohol) Functionalized Nanomagnetic Iron Oxide.
abstract: We developed a highly efficient magnetic relaxation switch (MRS) system based on poly(vinyl alcohol) functionalized nanomagnetic iron oxide (PVA@NMIO) particles for the detection of boric acid or borate ester (BA/BE). It was found that the addition of BA/BE induced the aggregation of PVA@NMIO particles, resulting in a measurable change in the T2 relaxation time in magnetic resonance measurements. The main mechanism was proposed that the electron-deficient boron atoms of BA/BE caused the aggregation of PVA@NMIO particles through covalent binding to the hydroxyl groups of PVA. This novel detection system displayed excellent selectivity, high sensitivity, and rapid detection for BA/BE. Thus, this system may provide a great application prospect for detection of BA/BE.
authors.affiliation: †Key Laboratory of Ion Beam Bioengineering Hefei Institutes of Physical Science, Chinese Academy of Sciences and Anhui Province, Hefei, 230031, People's Republic of China.|‡University of Science and Technology of China, Hefei 230026, People's Republic of China.
authors.forename: Guilong
authors.initials: G
authors.lastname: Zhang
authors.affiliation: †Key Laboratory of Ion Beam Bioengineering Hefei Institutes of Physical Science, Chinese Academy of Sciences and Anhui Province, Hefei, 230031, People's Republic of China.
authors.forename: Shiyao
authors.initials: S
authors.lastname: Lu
authors.affiliation: ∥High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China.
authors.forename: Junchao
authors.initials: J
authors.lastname: Qian
authors.affiliation: ∥High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhong
authors.affiliation: †Key Laboratory of Ion Beam Bioengineering Hefei Institutes of Physical Science, Chinese Academy of Sciences and Anhui Province, Hefei, 230031, People's Republic of China.
authors.forename: Jianming
authors.initials: J
authors.lastname: Yao
authors.affiliation: †Key Laboratory of Ion Beam Bioengineering Hefei Institutes of Physical Science, Chinese Academy of Sciences and Anhui Province, Hefei, 230031, People's Republic of China.
authors.forename: Dongqing
authors.initials: D
authors.lastname: Cai
authors.affiliation: §Department of Bioengineering, University of Pennsylvania, 240 Skirkanich Hall, 210 South 33rd Street, Philadelphia, Pennsylvania 19104, United States.
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: †Key Laboratory of Ion Beam Bioengineering Hefei Institutes of Physical Science, Chinese Academy of Sciences and Anhui Province, Hefei, 230031, People's Republic of China.
authors.forename: Zhengyan
authors.initials: Z
authors.lastname: Wu
keywords: boric acid or borate ester; food additives; high selectivity; high-throughput detection; magnetic relaxation switch