Pages: 22

This comprehensive review delves into the progressive advancements made in the domain of fingerprint development techniques, with a specific focus on the utilization of nanoparticles. With an emphasis on the application of nanoparticles, this in-depth examination explores the steady developments achieved in the field of fingerprint formation procedures. In forensic investigations, fingerprint identification is essential, and recent research has demonstrated that nanoparticles have tremendous potential to improve the visualization and preservation of latent fingerprints. This study provides an in-depth overview of the advantages, restrictions, and potential applications of the most recent approaches, materials, and procedures used in nanoparticle-based fingerprint generation. This study intends to further knowledge of how nanoparticles can revolutionize the area of forensic science and enhance the effectiveness and accuracy of fingerprint recognition by analyzing cutting-edge methods.

Pages: 30

Science and technology have made significant strides thanks to nano-technology. Additionally, it is crucial to forensic science and its use. The 24identification of fingerprints can benefit from nanoparticles. As one of the most valuable and reliable forms of forensic evidence, fingerprints are frequently used as the primary method of identifying humans during investigations. The need for the quick and easy finding and extraction of latent fingerprints at crime scenes is still critical since latent or invisible fingerprints are frequently found on crime scenes, and one of the tools used at crime scenes to find latent fingerprints is TiO2 nanoparticles. The many techniques for creating and characterizing TiO2 nanoparticles, as well as their use for fingerprint development, are summarized in this chapter.

Pages: 19

One of the most reliable characteristics for identifying someone is their fingerprint. In criminal investigations, recovering or gathering latent fingerprints from the crime scene is crucial. The contrast between the 54ridges and the substrate allows for the detection and description of fine features, which is essential for the successful use of created fingerprints for identification. A nanoparticle, often called an ultrafine particle, is a tiny material particle with a size range of 1–100 nm. Due to their small size, nanomaterials are exceptional in their ability to alter mechanical, electrical, and optical properties. At a crime scene, latent or invisible fingerprints are frequently left behind. Some of the nanoparticles used to obtain latent fingerprints include silica, carbon, aluminium, copper, barium, iron, and vanadium. Traditional methods have drawbacks such as low contrast, sensitivity, selectivity, and danger. These methods include powder dusting, chemical processes, and small particle reagent methods. The creation of latent fingerprints using fluorescent nanoparticles is the main subject of this review. Due to their distinctive optical and chemical properties, fluorescent nanoparticles were chosen because they offer greater contrast and sensitivity than conventional methods while also being less dangerous.

Pages: 22

Gold nanoparticles (AuNPs) have been used to detect various evidence collected during crime scene investigations. One of the most sought-after applications of gold nanomaterials is latent fingerprint development. The ability to absorb light in three electromagnetic spectrum regions (ultraviolet, visible, and near infrared) makes gold a go-to choice for analysts. The chapter discusses and focuses on the development of latent fingerprints from AuNPs along with the different types of synthesis and characterization methods used for their functionalization. AuNPs exhibit a range of properties which has proven beneficial for their successful application in forensic science. They offer a higher selectivity and sensitivity toward the sweaty secretions present in the fingerprint residues as well as a good contrasting image from the background. Due to the inert nature of 74gold, the developed fingerprint can be preserved for a longer period while maintaining its crucial features and not compromising on the quality of the print. AuNPs of different shapes and morphology that had been exploited in fingerprint development so far by employing different visualization methods are reviewed and the results of these studies are highlighted. The advantages and shortcomings of the AuNPs are also critically discussed. It is therefore imperative to tap the full potential and ability of gold nanomaterials to address the existing research gaps in the development of latent fingerprints present at the crime scene.

Pages: 17

One of the most promising technologies in various forensic science fields is nanotechnology. This method uses a cutting-edge strategy to address the problems associated with the emergence of latent fingermarks on various surfaces. Due to their wide surface area and strong adhesive properties, many metal nanoparticles and metal oxide nanoparticles, such as tin oxide and zinc oxide (ZnO), have been used in the detection of latent fingermarks. Throughout the world, non-hazardous ZnO, which has photo-oxidizing and photocatalytic capabilities, is being used to create nanoparticles (NPs). Due to their fluorescent nature, ZnO NPs are useful for creating high-quality latent fingermarks on a variety of surfaces. This chapter will cover the synthesis, properties, and 96characterization techniques of ZnO NPs for the development of latent fingermarks. Besides, the merits and demerits of ZnO NPs over other NPs will also be discussed.

Pages: 27

The development of latent fingerprints plays a pivotal role in forensic investigations by providing critical evidence for identifying individuals involved in criminal activities. However, traditional fingerprint development methods often rely on chemical reagents that are environmentally harmful and pose potential health risks to forensic investigators. In recent years, there has been a surge of interest in eco-friendly and sustainable techniques for fingerprint enhancement. Green synthesis involves the utilization of natural compounds, such as plant extracts and microorganisms, to fabricate nanoparticles with enhanced properties. These nanoparticles offer numerous advantages, including biocompatibility, cost-effectiveness, and minimal environmental impact. Furthermore, the role of different types of green-synthesized nanoparticles, such as silver, gold, and magnetic nanoparticles, in enhancing the visibility and quality of latent fingerprints. It discusses their unique properties, synthesis methods, and interactions with fingerprint residue components. It also discusses future research directions and potential advancements in this emerging field, with the aim of promoting sustainable and environmentally friendly approaches for forensic fingerprint analysis. Overall, the incorporation of green-synthesized nanoparticles in latent fingerprint development holds tremendous promise for advancing forensic science while mitigating the negative impact on the environment and human health. By embracing these eco-friendly techniques, forensic investigators can enhance their capabilities in fingerprint analysis while upholding sustainable practices.

Pages: 32

Latent fingerprint study and development are crucial to resolving criminal investigations. The traditional identification of fingerprint techniques frequently runs into problems like poor visualization and low sensitivity. This work suggests a unique method using iron oxide nanoparticles as a potentially effective substitute to improve the visibility of latent finger-prints, enabling more precise analysis, and identification of crime scenes. These nanoparticles are a good choice for forensic applications because of 142their distinctive magnetic characteristics and high biocompatibility. The functionalized surface of the nanoparticles has a particular coating to aid in adherence to the fingerprint residue. A suspension of the functionalized iron oxide nanoparticles (IONPs) is carefully placed on the crime scene surface to create latent fingerprints. The components of the latent fingerprints are specifically bound by the nanoparticles, creating a distinct visual pattern. This makes it possible to discover fingerprints that would normally be impossible to find using standard techniques, such as those that are old or deteriorated. The improved fingerprints are recorded using a variety of imaging methods, including magnetic powdering, fluorescence or magnetic visualization, and scanning electron microscopy. The IONPs’ high contrast considerably increases the precision and dependability of fingerprint identification by allowing forensic investigators to extract finer details and ridge patterns. According to preliminary findings, the suggested iron oxide nanoparticle-based technology improves latent fingerprint detection and visualization with improved sensitivity and selectivity when compared to conventional techniques.

Pages: 23

Latent fingerprints, composed of imperceptible sweat, oils, and skin secretions residues, are frequently encountered as evidence in criminal investigations. Traditional methods for developing and detecting these latent prints, such as fingerprint powders and chemical reagents, often need to be revised regarding efficiency and reliability. In recent years, nanomaterials have emerged as a promising avenue in nano-forensics, offering significant potential for enhancing the quality and durability of latent fingerprints. This chapter provides an overview of the diverse applications 174of nanoparticles in developing and detecting latent fingerprints on various surfaces. The utilization of nanoparticles, including silver, gold, silica, carbon, quantum dots, zinc oxide, and rare earth metal nanoparticles, is discussed in the context of their unique properties and capabilities in fingerprint analysis. Recognizing that fingerprints are a fundamental aspect of individual identity and a crucial tool in connecting criminals to their actions, this chapter explores how nanoparticle-based approaches can address the limitations of traditional methods. Nanotechnology is poised to play a pivotal role in advancing forensic science by improving latent prints’ sensitivity, versatility, and preservation. By exploring cutting-edge techniques and emerging trends, this chapter underscores the potential of nanoparticles to transform the landscape of latent fingerprint analysis in the foreseeable future.

Pages: 28

This chapter provides a thorough examination of various techniques for the manufacture of silver nanoparticles (AgNPs), with a focus on their possible use in creating latent fingerprints for forensic research. We carefully review a wide range of approaches, including chemical reduction, biological synthesis, microwave-assisted synthesis, green synthesis, photochemical reduction, ultrasonication (sonochemical procedures), and electrochemical methods. The inherent benefits, difficulties, and uniqueness of each strategy are elaborated, based on a wide range of 198research investigations. The discussion emphasizes how different synthesis methods might affect the characteristics of AgNP, how they interact with fingerprint residues, and the quality of visualization that results. The overall story emphasizes how important it is to choose a synthesis process that is acceptable for forensic applications and urges the research community to explore more improvement and innovation in this crucial area.

Pages: 15

This chapter presents a novel method for forensic investigations by examining the application of cadmium sulfide (CdS) and cadmium selenium (CdSe) nanoparticles for latent fingerprint formation. Criminal investigations depend heavily on fingerprint analysis, and new uses of nanotechnology have the potential to completely transform this area of study. Because of their special qualities, which include highly photoactive and programmable sizes, CdS and CdSe nanoparticles are perfect for detecting latent prints on a variety of surfaces. With less influence on the environment and less toxicity than conventional techniques, they provide an eco-friendly substitute. The usefulness and efficacy of these nanoparticles in raising the precision and productivity of fingerprint analysis are demonstrated by case studies and research findings.