School of Nanoscience and Technology, Indian Institute of Technology, Kharagpur 721302, India.
Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India.
J Photochem Photobiol B. 2019 Aug;197:111545. doi: 10.1016/j.jphotobiol.2019.111545. Epub 2019 Jul 12.
Proper waste utilization in order to promote value added product is a promising scientific practice in recent era. Inspiring from the recurring trend, we propose a single step oxidative pyrolysis derived fluorescent carbon dots (C-dots) from Allium sativum peel, which is a natural, nontoxic, and waste raw material. Because of its excellent optical properties, and photostability this C-dots have been used in versatile area of applications. Due to its immediate water dispersing character, C-dots reinforced Poly(acrylic acid) (PAA) films revealed improvement in uniaxial stretching behavior and can be used as transparent sunlight conversion film. The nanocomposite film has been tested against rigorous simulated sunlight which proved almost identical sunlight conversion behavior with no photo-bleachable character which is definitely added an extra quality of transparent polymer films. Moreover, the C-dots dispersion has been used as in vitro biomarker for living cells owing to its ease in solubility, biocompatibility, non-cytotoxicity and bright fluorescence even in subcutaneous environment. For this case, adipose derived mesenchymal stem cells (ADMSCs) have been chosen and injected to rabbit ear skin to perform two-photon imaging experiment. The present work opens a new avenue towards the large-scale synthesis of bio-waste based fluorescent C-dots, paving the way for their versatile applications.
为了促进增值产品，合理利用废物是当今时代一项很有前途的科学实践。受这一反复出现的趋势的启发，我们提出了一种从天然、无毒且废料的大蒜皮中一步氧化热解制备荧光碳点（C-dots）的方法。由于其出色的光学性质和光稳定性，这些 C-dots 已在各种应用领域得到了应用。由于其立即水分散的特性，C-dots 增强的聚丙烯酸（PAA）薄膜在单轴拉伸行为方面显示出了改善，并且可以用作透明阳光转换膜。该纳米复合材料已针对严格模拟的阳光进行了测试，结果表明其阳光转换行为几乎相同，没有光漂白特性，这无疑为透明聚合物薄膜增添了额外的品质。此外，由于其易于溶解、生物相容性、非细胞毒性和在皮下环境中也具有明亮的荧光，因此 C-dots 分散体已被用作活细胞的体外生物标志物。在这种情况下，选择脂肪来源的间充质干细胞（ADMSCs）并注入兔耳皮肤中进行双光子成像实验。本工作为基于生物废物的大规模合成荧光 C-dots 开辟了新途径，为它们的广泛应用铺平了道路。
