Facile and green synthesis of photoluminescent carbon nanoparticles for cellular imaging

Green synthesis of fluorescent carbon dots from carrot juice for in vitro cellular imaging

“…The excitation dependent PL phenomenon might be caused by emissive traps and surface states, which resulted from abundant self-passivated oxygen and nitrogen-containing functional groups (Fig. 3) on the surface of CDs [6,7], agreeing well with other reported CDs prepared from natural sources [4,14,15,27,28].…”

“…The HR-TEM image also showed clear lattice spacing with an interfringe distance of 0.345 nm, which may be attributed to the (002) facet of the sp 2 graphitic crystal phase of graphene [29]. Most of these CDs were amorphous but a typical X-ray difvia chemical synthesis, such as chemical or thermal oxidation of suitable chemical precursors [14,15], ultrasonic treatment of alkali or acid aqueous solutions of glucose [16,17], and microwave pyrolysis of carbohydrates [18,19]. By contrast, the hydrothermal method is considered to be a facile, green, and efficient approach.…”

“…By contrast, the hydrothermal method is considered to be a facile, green, and efficient approach. Recently, natural biomass precursors as raw materials (such as glucose, konjac, chitosan, potato, Prunus mume fruit, cabbage, egg, grass, coffee, and others) for the preparation of functional CDs via the hydrothermal method have gained popularity due to the abundance of these carbon sources, as well as their availability, low cost, and eco-friendliness [14,[20][21][22][23][24][25][26][27][28]. In this regard, the preparation of high quality CDs from a suitable biomass as a carbon source is essential.…”

Insecticide as a precursor to prepare highly bright carbon dots for patterns printing and bioimaging: A new pathway for making poison profitable

“…Recently, with rapid developments in C-dots research, the functionalization of C-dots and their applications, especially in bioimaging have become a hotspot [45,46]. On the other hand, the precursors of the C-dots are not limited in conventional chemical reagents with high purity and the reaction condition is relatively simple [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Both of which, together with few reported aromatic compounds containing-based C-dots [42,47], inspired us to reason that HPs may be carbonized at appropriate solvothermal condition in pursuit of highly bright C-dots.…”

“…Whereas the raw materials for C-dots are nearly hands-down. Several published papers have reported the preparation of fluorescent C-dots using natural precursors such as hair fiber [17], humic substances [18], carbon black [19], milk [20], glycine [21], carbohydrates [10,22,23], resol [24], glycerol [25], candle soot [26], fruits [27][28][29], and so on, which are widely distributed in any corner of nature and our daily life, and easily available to replace traditional chemicals reagents. These synthesized C-dots integrate advantages of high brightness, low cost and multicolorful emission as well as above mentioned ones.…”