@misc{10481/85837,
year = {2021},
month = {1},
url = {https://hdl.handle.net/10481/85837},
abstract = {We report a simple, rapid, low-resource and one-step method for formation of fluorescent silicon nanodots (SNDs) in a microfluidic paper-based analytical device (μPAD) incorporated in a reusable, portable and flexible heater for determination of total carbohydrates. The synthesis of SNDs is based on the redox reaction between (3-aminopropyl) triethoxysilane (APTS) reagent and carbohydrates, which act as a reducer. The graphene-based heater was fabricated by laser ablation of Kapton polyimide. Thereby, the developed system heat the μPAD during the synthesis of SNDs at 80 °C for 30 min. The blue emitting SNDs formed have an emission peak wavelength at 475 nm. We used a digital camera and smartphone for the quantitative analysis of total carbohydrates expressed such as index of glucose or fructose with grey scale value as the analytical parameter. Under the optimal conditions, the method has a low detection limit (0.80 μM for glucose and 0.51 μM for fructose, respectively), and a linear response (10–200 μM for glucose and 10–100 μM for fructose). The method has been applied to the determination of glucose in biological fluids (serum and urine samples). In addition, determination of total carbohydrates in commercial juices and teas have been carried out},
organization = {This work was founded by Spanish “Ministerio de Economía y Competitividad” (Projects PID2019-103938RB-I00 and CTQ2017-86125-P) and Junta de Andalucía (Projects B-FQM-243-UGR18 and P18-RT-2961). The projects were partially supported by European Regional Development Funds (ERDF).},
publisher = {Elsevier},
keywords = {Silicon nanodots},
keywords = {Total carbohydrates},
keywords = {Color measurement},
keywords = {μPAD},
keywords = {Smartphone},
keywords = {Laser induced graphene heater},
keywords = {Laser-scribing},
title = {In situ synthesis of fluorescent silicon nanodots for determination of total carbohydrates in a paper microfluidic device combined with laser prepared graphene heater},
doi = {10.1016/j.snb.2021.129506},
author = {Ortiz Gómez, Inmaculada and Toral López, Víctor and Romero Maldonado, Francisco Javier and Orbe Payá, Ignacio De and García Ríos, Antonio and Rodríguez Santiago, Noel and Capitán Vallvey, Luis Fermín and Morales Santos, Diego Pedro and Salinas Castillo, Alfonso},
}