Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks
Single metal deposition (SMD II), a recently proposed method for the development of latent fingermarks, was investigated by systematically altering aspects of the procedure to assess their effect on the level of development and contrast achieved. Gold nanoparticle size, temperature of the deposition...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier Ireland Ltd
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/13013 |
| _version_ | 1848748235129094144 |
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| author | Newland, Talia G. Moret, S. Bécue, A. Lewis, Simon |
| author_facet | Newland, Talia G. Moret, S. Bécue, A. Lewis, Simon |
| author_sort | Newland, Talia G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Single metal deposition (SMD II), a recently proposed method for the development of latent fingermarks, was investigated by systematically altering aspects of the procedure to assess their effect on the level of development and contrast achieved. Gold nanoparticle size, temperature of the deposition solution bath, and orbital shaking during detection were shown to affect the levels of development and contrast obtained. Gold nanoparticles of diameter 15–21 nm were found to be most effective for satisfactory visualisation of latent fingermarks, while solutions that were applied at room temperature were found to adequately balance the ratio between the contrast of the fingermark ridge detail and the level of background staining achieved. Finally, optimum levels of development and contrast were obtained through constant agitation of both solution baths at approximately 50 RPM throughout the submersion time. SMD II was also tested on a large variety of substrate types and shown to be effective on a range of porous, non-porous, and semi-porous surfaces; however, the detection quality can be significantly influenced by the substrate nature. This resulted in the production of dark grey, white, or gold coloured fingermarks on different surfaces, as well as reversed detection on certain types of plastic, similarly seen through the use of vacuum metal deposition. © 2016 Elsevier Ireland Ltd |
| first_indexed | 2025-11-14T07:01:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-13013 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:01:49Z |
| publishDate | 2016 |
| publisher | Elsevier Ireland Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-130132017-09-20T04:06:13Z Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks Newland, Talia G. Moret, S. Bécue, A. Lewis, Simon Single metal deposition (SMD II), a recently proposed method for the development of latent fingermarks, was investigated by systematically altering aspects of the procedure to assess their effect on the level of development and contrast achieved. Gold nanoparticle size, temperature of the deposition solution bath, and orbital shaking during detection were shown to affect the levels of development and contrast obtained. Gold nanoparticles of diameter 15–21 nm were found to be most effective for satisfactory visualisation of latent fingermarks, while solutions that were applied at room temperature were found to adequately balance the ratio between the contrast of the fingermark ridge detail and the level of background staining achieved. Finally, optimum levels of development and contrast were obtained through constant agitation of both solution baths at approximately 50 RPM throughout the submersion time. SMD II was also tested on a large variety of substrate types and shown to be effective on a range of porous, non-porous, and semi-porous surfaces; however, the detection quality can be significantly influenced by the substrate nature. This resulted in the production of dark grey, white, or gold coloured fingermarks on different surfaces, as well as reversed detection on certain types of plastic, similarly seen through the use of vacuum metal deposition. © 2016 Elsevier Ireland Ltd 2016 Journal Article http://hdl.handle.net/20.500.11937/13013 10.1016/j.forsciint.2016.09.004 Elsevier Ireland Ltd fulltext |
| spellingShingle | Newland, Talia G. Moret, S. Bécue, A. Lewis, Simon Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks |
| title | Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks |
| title_full | Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks |
| title_fullStr | Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks |
| title_full_unstemmed | Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks |
| title_short | Further investigations into the single metal deposition (SMD II) technique for the detection of latent fingermarks |
| title_sort | further investigations into the single metal deposition (smd ii) technique for the detection of latent fingermarks |
| url | http://hdl.handle.net/20.500.11937/13013 |