journal article·2021-03-26

ZnFe2O4 Magnetic Nanoparticle–Polydiacetylene–Zinc(II) Composites for Real-Time Nanothermometers and Localizable Acid/Base Sensors

Sarawut Kingchok, Pohnpawee Nontasorn, Kritapas Laohhasurayotin, Nisanart Traiphol, Rakchart Traiphol

ACS Applied Nano Materials· Volume 4· Issue 3
Publisher page

Abstract

Nanocomposites of polydiacetylene (PDA) and magnetic nanoparticles (MNPs), exhibiting irreversible thermochromism, have shown potential for use as nanothermometers. This type of nanocomposite, however, does not allow measurement of the real-time temperature. In this study, we introduce the first example of magnetic PDA-based nanocomposites, exhibiting reversible thermochromism and colorimetric response to both acidic and basic conditions. Zinc ferrite magnetic nanoparticles (ZnFe2O4-MNPs) decorated the surface of PDA/Zn2+ assemblies, forming PDA/Zn2+/ZnFe2O4 magnetic nanocomposites. The intercalation of Zn2+ ions, released from ZnFe2O4-MNPs, with PDA bilayers via strong interaction with a carboxylate headgroup provides reversible thermochromism. This reversible thermochromic nanocomposite with magnetic properties is ideally suited for advanced applications requiring precise local thermal or pH sensing. For instance, the magnetothermally induced thermochromism of PDA could be implemented for real-time measurement of the local temperature (e.g., magnetic hyperthermia), visualization of the magnetic field, and many other related applications. In addition, the colorimetric response of this material to acids and bases makes possible measurement of the local pH in a small-scale environment, localized at a target area, focused using an external magnetic field.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Polydiacetylene-based materials and applications · Ocular Surface and Contact Lens · Supramolecular Self-Assembly in Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory of Advanced Polymers and Nanomaterials, School of Materials Science and Innovation, Faculty of Science, Mahidol University at Salaya, Phuttamonthon 4 Road, Nakhon, Pathom 73170, Thailand

National Nanotechnology Center (NANOTEC), National Science and Technology Development (NSTDA), Pathum, Thani 12120, Thailand

Laboratory of Advanced Chromic Materials, Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand

Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand

NANOTEC-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand

NANOTEC-MU Excellence Center of Intelligent Materials and Systems, Nanocomposites, Nanosensor and Nanoelectronics, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok 10400, Thailand

Funding

National Science and Technology Development Agency · National Nanotechnology Center · Mahidol University · Ministry of Higher Education, Science, Research and Innovation, Thailand

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