Orange ‐Emissive Carbon Quantum Dots: Toward Application in Wound pH Monitoring Based on Colorimetric and Fluorescent Changing
Novel orange ‐emitting carbon quantum dots with pH‐induced fluorescence variation and colorimetric behavior are synthesized by a microwave method. By simply incorporating these fluorescent nanostructures with cotton cloth, the resultant composite with yellow emission exhibits high response to pH variation in the range of 5–9 via both fluorescence and colorimetric changes, thus demonstrating its potential in wound pH monitoring. AbstractMonitoring of wound pH is critical for interpreting wound status, because early identification of wound infection or nonhealing wounds is conducive to administion of therapies at the right time. Here, novel orange ‐emissive carbon quantum dots (O‐CDs) are synthesized via microwave‐assisted heating of 1,2,4‐triaminobenzene and urea aqueous solution. The as‐prepared O‐CDs exhibit distinctive colorimetric response to pH changing, and also display pH‐sensitive fluorescence. Benefiting from the respo nse of O‐CDs over a wound‐relevant pH range (5–9), medical cotton cloth is selected to immobilize O‐CDs through hydrogen bond interactions, the resultant O‐CDs‐coated cloth with emission at 560 nm shows a high response to pH variation in the range of 5–9 via both fluorescence and visib le colorimetric changes. Moreover, the sensitivity of fluorescence to pH is capable of establishing an analytical mode for determining pH value. Further, the O‐CDs‐based pH indicator possesses not only superior biocompatibility and dr...
Source: Small - Category: Nanotechnology Authors: Pei Yang,
Ziqi Zhu,
Tao Zhang,
Wei Zhang,
Weimin Chen,
Yizhong Cao,
Minzhi Chen,
Xiaoyan Zhou Tags: Full Paper Source Type: research
More News: Nanotechnology