Synthesis of matrix-free carbon dots for information encryption, fingerprinting, and antibacterial activity

Development of graphitic-N-based carbon dots using solid-state synthesis for fingerprinting, LEDs, and anticounterfeiting

“…6(a)–(f), and (h) displays the second-level pattern, including bifurcation, short ridge, crossover, hook, dot as island, termination, and bridge. 33 Particularly noteworthy is that it shows the third-level pattern of fingerprints, such as pores, as shown in Fig. 6(g).…”

“…3(b)) denote the existence of the C–C/CC, C–N, O–C–O/CO, and OC–N/OC–OH, respectively. 33,44 There are two peaks at 531.05 eV and 532.55 eV in the high-resolution XPS of the O1s spectrum (Fig. 3(c)) that were deconvoluted to demonstrate the existence of C–O and CO groups, respectively.…”

“…The RP-CDs were synthesized by solid-state methods, which were encouraged by our previous study with appropriate modifications. 33 Pyromellitic acid (6 mmol) and urea (2 mmol) were ground for a long time using a mortar pestle and transferred to a porcelain crucible with a lid. It was placed in a muffle furnace for 3 h for calcination at 270 °C with a 5° ramping rate.…”

Gram-scale synthesis of aggregation-caused quenching-resistant red-emissive carbon dots for potential applications

“…5(d). 43,45 It should be emphasized that the entire process was quick and was able to be performed in less than one minute by qualified detectives. Furthermore, using a powerful UV lamp and continuous irradiation, the photostability of R-CD powder was investigated.…”

“…Potassium dihydrogen orthophosphate (KH 2 PO 4 ), potassium chloride (KCl), sodium nitrate (NaNO 3 ), and R-CDs were employed as precursors to obtain RTP. 5,43 Here, KH 2 PO 4 , KCl, and NaNO 3 act as dopants. In this case, sodium nitrate was used as the nitrate salt, whereas potassium dihydrogen orthophosphate and potassium chloride were used as doping salts.…”