Direct synthesis of carbon quantum dots in aqueous polymer solution: one-pot reaction and preparation of transparent UV-blocking films

Abstract

Synthesized transparent CQD–PVA composite films performed stable UV-A blocking, even after exposure to UV light for several days and elevated temperature.

One-Pot Synthesis of Photoluminescent Self-Assembled Carbon Dot Monolayer Films

“…The UV-Vis spectra of benzene series-CDs presented a broad absorption band (200-600 nm) as previously reported [21]. A clear shoulder absorption peak of styrene CDs at 230 nm was attributed to the π-electron system, suggesting the existence of the sp 2 aromatic 3 Journal of Nanomaterials structure units [22], which might originate from the impurities of the styrene ( Figure S2). As shown in Figure 1(f), a strong Raman signature from the G band assigned to sp 2 carbons appeared at the energy peak of 1590 cm -1 .…”

Simultaneous ultraviolet and first near-infrared window absorption of luminescent carbon dots/PVA composite film

“…5,13 To resolve the quenching effect of CDs, liquid CDs were dispersed in a single matrix including silica, 14 mesoporous alumina, 15 and several polymers such as polyvinylpyrrolidone (PVP), polyacrylic acid (PAA), polyacrylamide (PAM), 16 polymethyl methacrylate (PMMA), poly(N-isopropylacrylamide) (PNIPAM), 17 and polyvinyl alcohol (PVA). 8,9,[17][18][19][20][21] All of these CDs/ polymer composite lms absorb only in the UV region. For medical applications such as photothermal and cancer therapy, the CDs/PVA composite lms have to absorb in the rst NIR window (650-900 nm) because the light in this region does not damage the living tissues.…”

Synthesis of carbon quantum dots to fabricate ultraviolet‐shielding poly(vinylidene fluoride) films

“…Additionally, their applications range from energy‐related devices to biology and composite films . CQD particles were also applied in UV‐shielding film preparation because of their broad UV region and strong absorbance …”