Research On The Application Of Fabric Finishing And Testing Based On Gold Nanorods

In recent years,the unique optical properties of noble metal nanoparticles have broad application prospects in various fields.Among them,gold nanorods(AuNRs)are favored for their anisotropic and regulatable surface plasmon resonance characteristics.In this paper,AuNRs with uniform size and good dispersion were prepared by seed-mediated growth method,and AuNRs with different aspect ratios were obtained by changing the amount of silver nitrate(AgNO3).The silver shell was coated on the surface of AuNRs,and the silver shell was electrochemically replaced by gold(?)chloride trihydrate(HAuCl4)to obtain gold@gold core shell double-layer nanorods(Au@Au NRs)with obvious core-shell structure and uniform nano-gap.The longitudinal surface plasmon resonance peak of AuNRs red-shifted with the increase of silver ion content.The formation of silver shell or gold shell caused blue shift of the longitudinal surface plasmon resonance peak relative to AuNRs.The SERS effect of Au@Au NRs containing different Raman reporters(4-mercaptobenzoic acid;4-MBA,5,5'-dithiobis(2-nitrobenzoic acid);DTNB,and 2-mercapto-4-methyl-5-thiazol-eacetic acid;MMTAA)was compared by Raman spectroscopy.It was found that Au@Au NRs(DTNB)had the strongest Raman signal.AuNRs have vivid colors due to large absorption and scattering cross sections,and exhibit different colors by regulating the longitudinal surface plasmon resonance peaks of AuNRs.Arranging them on cotton and silk fabrics improves the UV and antibacterial properties of the fabric.It provides a new technology platform for the development of environmentally friendly dyeing and finishing processes and functional fabrics.Natural and synthesized indigo were identified using surface plasmon resonance(SPR)properties of AuNRs in combination with surface enhanced Raman spectroscopy(SERS)techniques.It has successfully realized the trace identification of natural and synthetic indigo which are difficult to distinguish by traditional spectroscopy methods,and provides theoretical basis and practical experience for the identification of natural and synthetic dyes and effective monitoring of textile quality.The detection of different concentrations of glucose was achieved by using Au@Au NRs(DTNB)modified with 4-mercaptophenylboronic acid(4-MPBA)as the substrate.At the same time,combined with the experimental basis of AuNRs coated fabric,4-MPBA modified Au@Au NRs(DTNB)was coated into fabric to obtain "smart" detection fabric for glucose content monitoring.The design and application of optical sensing "smart" wearable textile materials that use sweat as a test sample to monitor human glucose levels in real time is extremely promising.