However, these methods might be limited by factors associated with particle size, toxicity of the reagent, selectivity, or sensitivity, that may be circumvented by the synthetic design of innovative materials based on nanoparticles or macromolecular materials, such as conducting polymers, applied as latent fingerprint developers on different surfaces and conditions. The majority of conventional techniques for latent fingerprint enhancement are based on chemical reactions or interactions between the developer and fin-germark residue components, providing contrast between the surface and the fingerprint ridges.
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