Imaging Latent Fingerprints by Electrochemiluminescence

Xu, Linru; Li, Yan; Wu, Suozhu; Liu, Xianghong; Su, Bin

doi:10.1002/anie.201203815

Cited by 197 publications

(141 citation statements)

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“…Owing to the presence of sweat components (fatty acids, amino acids, inorganic salts and so on), these patterns are transferred to solid substrates when fingers touch the surface. Analyses of the fingerprint patterns left on solid surfaces have been unarguably one of the most convincing tools for the proof of an individual’s presence at a specific location and, as a result, a variety of techniques3940414243444546 have been developed for imaging and comparing these patterns.…”

Section: Resultsmentioning

confidence: 99%

Hydrochromic conjugated polymers for human sweat pore mapping

et al. 2014

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Hydrochromic materials have been actively investigated in the context of humidity sensing and measuring water contents in organic solvents. Here we report a sensor system that undergoes a brilliant blue-to-red colour transition as well as ‘Turn-On’ fluorescence upon exposure to water. Introduction of a hygroscopic element into a supramolecularly assembled polydiacetylene results in a hydrochromic conjugated polymer that is rapidly responsive (<20 μs), spin-coatable and inkjet-compatible. Importantly, the hydrochromic sensor is found to be suitable for mapping human sweat pores. The exceedingly small quantities (sub-nanolitre) of water secreted from sweat pores are sufficient to promote an instantaneous colorimetric transition of the polymer. As a result, the sensor can be used to construct a precise map of active sweat pores on fingertips. The sensor technology, developed in this study, has the potential of serving as new method for fingerprint analysis and for the clinical diagnosis of malfunctioning sweat pores.

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Section: Resultsmentioning

confidence: 99%

Hydrochromic conjugated polymers for human sweat pore mapping

et al. 2014

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“…Based on the close relationship of ECL intensity/image with the spatial reactivity of electrode surface, ECL has been developed as a means to visualize fingermarks by selective control of electrochemical reactions [67]. Sebaceous fingermarks consist of organic residues picked up from the face or scalp by fingertip ridges, which can make the underlying electrode surface inert or less active than the fresh one to inhibit the ECL reaction.…”

Section: Imaging Reactivity At Electrode Surfacesmentioning

confidence: 99%

Imaging Analysis Based on Electrogenerated Chemiluminescence

et al. 2017

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Electrochemiluminescence (ECL), also called electrogenerated chemiluminescence, is luminescence that is produced by chemical reactions triggered by electrochemical method. ECL imaging is a novel imaging technique, which can simultaneously provide two kinds of signals of both electrochemistry and optical image. Over the past two decades, ECL imaging has been not only a powerful tool for investigating the fundamental scientific questions such as ECL mechanisms and reaction kinetics, but also a versatile analytical technique for detection of a wide range of analytes including small molecules, DNA, proteins, and cells. In the first part of this review, we briefly describe the reaction mechanisms of ECL generation. Then the review focuses on the research progress on the ECL imaging approach. It is basically introduced from the following five aspects: (i) visualization of electroactive sites on surfaces, (ii) imaging analysis at the single-bead and single-cell levels, (iii) array bioanalysis, (iv) multi-color ECL imaging, and (v) paper chip based on ECL imaging. Finally, some perspectives and future directions in this active research area are presented.

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“…polyaniline and poly(3,4-ethylenedioxythiophene)). Recently, our group developed an electrochemiluminescence (ECL) imaging method for visualizing LFPs by the spatially selective control of the location of ECL generation (Figure 1), using Ru(bpy) 3 2 [46] or rubrene [47] as the ECL luminophore. This method is particularly useful in visualizing LFPs on metal surfaces, e.g., stainless steel [48], that are often found in felony cases.…”

Section: Electrochemical Techniquesmentioning

confidence: 99%