Scholarlink

<p>Thin films of cellulose nanocrystals (CNCs) with fluorescein (FL) were prepared employing the zone-casting technique. Using an aqueous CNC suspension admixed with FL allowed the preparation of fluorescent CNC/FL films with varying FL content. In the zone-cast films, the CNCs were oriented perpendicularly to the zone-casting direction. The fluorescence emission intensity depended on the FL content in the films and was the strongest at the FL to CNC weight ratios of 1/125 and 1/200. Moreover, the emission intensity and polarization depended on the excitation beam polarization. The strongest emission was recorded when the polarizer and analyzer axes were parallel to the direction of CNC orientation. Moreover, the films sprayed with aqueous solutions after drying exhibited fluorescence depending on the solution pH in a wide pH range.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Fluorescent composite films of oriented cellulose nanocrystals with fluorescein

  • 期刊论文

  • 发表日期：

    2025年2月28日

查看全文
  • Inna Shkyliuk,
  • Tomasz Makowski,
  • Ewa Piorkowska

摘要

Thin films of cellulose nanocrystals (CNCs) with fluorescein (FL) were prepared employing the zone-casting technique. Using an aqueous CNC suspension admixed with FL allowed the preparation of fluorescent CNC/FL films with varying FL content. In the zone-cast films, the CNCs were oriented perpendicularly to the zone-casting direction. The fluorescence emission intensity depended on the FL content in the films and was the strongest at the FL to CNC weight ratios of 1/125 and 1/200. Moreover, the emission intensity and polarization depended on the excitation beam polarization. The strongest emission was recorded when the polarizer and analyzer axes were parallel to the direction of CNC orientation. Moreover, the films sprayed with aqueous solutions after drying exhibited fluorescence depending on the solution pH in a wide pH range.