Abstract
Luminescent carbon nanomaterials are important materials for sensing, imaging, and display technologies. This work describes the use of microwave heating for the template-assisted preparation of luminescent carbon nanofibers (CNFs) from the reaction of a range of beverage-related precursors with the nitrogen-rich polyethyleneimine. Highly luminescent robust carbon fibers that were 10 to 30 μm in length and had a diameter of 200 nm were obtained under moderate conditions of temperature (250–260 °C) and a short reaction time (6 min). The high aspect ratio fibers showed wavelength-dependent emission that can be readily imaged using epifluorescence. The development of these multi-emissive one-dimensional (1D) carbon nanomaterials offers potential for a range of applications.
Highlights
In the past 15 years, microwave irradiation has emerged as a powerful tool for the synthesis and functionalization of carbon nanomaterials [1]
General applicability of the template-assisted microwave method to the preparation of luminescent we demonstrate the general applicability of the template-assisted microwave method to nanofibers from the reaction ofnanofibers a range offrom beverage-related with PEI, and describe their the preparation of luminescent the reaction ofprecursors a range of beverage-related precursors luminescent optical properties
This study investigated the use of orange juice (Oj), grapefruit juice (Gj), lemon juice (Lj), and the soft drink Coca-Cola (CC)
Summary
In the past 15 years, microwave irradiation has emerged as a powerful tool for the synthesis and functionalization of carbon nanomaterials [1]. Luminescent carbon dots (CDots), which typically have sizes below 10 nm, have attracted significant interest in recent years due to their biocompatibility and tunable optical properties, with emission observed across the visible spectrum [9,10]. These nanoparticles are routinely prepared via the carbonization of a wide range of small molecule precursors, including bio-organic acids, sugars, alcohols, and foodstuffs [11,12,13,14,15,16,17]. Microwave synthesis has proven extremely effective for CDot synthesis with over 900 reports in the literature since 2003
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