Latent fingermark visualisation using a scanning Kelvin probe

Polymerisation of S2N2 to (SN)x as a tool for the rapid imaging of fingerprints removed from metal surfaces

“…Pioneering 35 work by Bond 10 and Williams 11 has revealed that instrumental techniques such as Atomic Force Microscopy and Scanning Kelvin Probe can image the minuscule surface corrosion effect generated by prints which have been laid down on metallic surfaces, even after the prints themselves have been 40 removed through various rigorous cleaning regimes. These results highlight the immense potential of such minor corrosive action on forensically pertinent substrates; however, the imaging techniques themselves suffer realistic limitations, such as the length of time required to process a macroscopic 45 area, cost and problems analysing irregular surface forms.…”

Advances in the development and component recognition of latent fingerprints

“…Scanning Kelvin probe technique [25] and scanning electrochemical microscopy (SECM) [23,44,45] with microscale resolution have also been employed for visualizing LFPs on a variety of surfaces. Hillman et al [11,12] have demonstrated the visualization of LFPs by means of spatially selective deposition of electrochromic polymers (e.g.…”

“…These include powder dusting, fluorescent dyes, ninhydrin/1,2-diazafluoren 9-ONE staining, cyanoacrylate/iodine fuming, and vacuum metal deposition [13,14]. Synthetic techniques [11,[15][16][17][18], metal [19,20] and semiconductor nanoparticles (NPs) [13,21,22], as well as electrochemical methods [23][24][25], have also been exploited. In addition, the past few years have witnessed a renewal of research interest in the possibility that a fingerprint can provide additional information about the donor than mere identification [7].…”

Multidimensional electrochemical imaging in materials science

“…The corrosion potential E corr also remains lower, which implies the formation of a passivating film. Besides this work on more or less conventional organic coatings, KFM has also been used to visualize latent eccrine fingermarks on metallic surfaces [134]. Zerweck et al [135] have recently used the scanning Kelvin probe technique to study changes in work function on adsorption of C 60 by different metal single crystals.…”