One-step facile preparation of carbon dots with high fluorescence quantum yield and application in rapid latent fingerprint detection

Abstract

The development of luminescent materials greatly affects the development of fluorescence imaging technology.

Solid‐State Organic Fluorophore for Latent Fingerprint Detection and Anti‐Counterfeiting Applications

“…[7] These solid-state organic fluorescent molecules have wide applications in the fields of sensors, bioimaging, biomedicine, etc. [8][9][10] Visualization of the latent fingerprints using luminescent organic dyes is trivially done by spraying or applying the powder from these dyes over the fingerprints and discerning the patterns on the fingers under the ultraviolet light source. [11] LFPs can be detected using many fluorescent materials like quantum dots and metal dyes which are harmful to the environment or may quench the fluorescence due to the aggregation in the solid state.…”

“…However, except for the powder dusting method which is possible because of the solid‐state organic fluorescent materials other methods have various limitations such as low sensitivity, weak adhesion, probability of environmental pollution, and difficulty in identifying the fingerprints after a long time‐lapse [7] . These solid‐state organic fluorescent molecules have wide applications in the fields of sensors, bioimaging, biomedicine, etc [8–10] …”

A preparation strategy for multicolor carbon dots embedded in silicone for latent fingermarks and detection of AcO−

“…For example, most CDs exhibit the aggregation-caused quenching (ACQ) phenomenon. To overcome the ACQ effect, many researchers use starch, 17 silicon gel, [18][19][20][21] montmorillonite, 22 PVA, 23 organic silicon 24,25 and other materials to adsorb and disperse CDs. There is only physical adsorption between the CDs and the additives, and the binding is not firm.…”

Nanosheets of two-dimensional photoluminescent lanthanide phosphonocarboxylate frameworks decorated with free carboxylic groups for latent fingerprint imaging

“…[6][7][8] However, these visualization methods may suffer from low sensitivity and selectivity, low contrast between the fingerprint and the surface, and even high toxicity towards human health. Recently, much attention has been paid to the use of fluorescent nanomaterials, such as quantum dots (QDs), [9][10][11] carbon dots (CDs), [12][13][14] rare earth upconversion nanomaterials, [15][16][17] etc. Fluorescent nanomaterials can emit strong fluorescence, providing promising contrasts on different surfaces compared to conventional methods.…”