Near Infrared-to-Near Infrared Upconversion Nanocrystals for Latent Fingerprint Development

2019 ◽  
Vol 2 (7) ◽  
pp. 4518-4527 ◽  
Author(s):  
Aravind Baride ◽  
Ganesh Sigdel ◽  
William M. Cross ◽  
Jon J. Kellar ◽  
P. Stanley May
Keyword(s):  
Near Infrared ◽  
Latent Fingerprint ◽  
Upconversion Nanocrystals ◽  
Latent Fingerprint Development

ESDA Processing and Latent Fingerprint Development: The Humidity Effect

2003 ◽  
Vol 48 (3) ◽  
pp. 2002421 ◽  
Author(s):  
Myriam Azoury ◽  
Rachel Gabbay ◽  
Drorit Cohen ◽  
Joseph Almog
Keyword(s):  
Humidity Effect ◽  
Latent Fingerprint ◽  
Latent Fingerprint Development

scholarly journals Core-Shell Structures of Upconversion Nanocrystals Coated with Silica for Near Infrared Light Enabled Optical Imaging of Cancer Cells

Micromachines ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 400 ◽  
Author(s):  
Kumbam Lingeshwar Reddy ◽  
Neeraj Prabhakar ◽  
Jessica Rosenholm ◽  
Venkata Krishnan
Keyword(s):  
Optical Imaging ◽  
Cancer Cells ◽  
Near Infrared ◽  
Shell Structures ◽  
Therapeutic Window ◽  
Luminescence Spectroscopy ◽  
Core Shell ◽  
Shell Nanostructures ◽  
Nir Light ◽  
Upconversion Nanocrystals

Optical imaging of cancer cells using near infrared (NIR) light is currently an active area of research, as this spectral region directly corresponds to the therapeutic window of biological tissues. Upconversion nanocrystals are photostable alternatives to conventional fluorophores. In our work, we have prepared upconversion nanocrystals of NaYF4:Yb/Er and encapsulated them in silica to form core-shell structures. The as-prepared core-shell nanostructures have been characterized for their structure, morphology, and optical properties using X-ray diffraction, transmission electron microscopy coupled with elemental mapping, and upconversion luminescence spectroscopy, respectively. The cytotoxicity examined using cell viability assay indicated a low level of toxicity of these core-shell nanostructures. Finally, these core-shell nanostructures have been utilized as photostable probes for NIR light enabled optical imaging of human breast cancer cells. This work paves the way for the development of advanced photostable, biocompatible, low-toxic core-shell nanostructures for potential optical imaging of biological cells and tissues.

scholarly journals Non-toxic luminescent Au Nanoclusters@Montmorillonite nanocomposites powders for latent fingerprint development

RSC Advances ◽  
2017 ◽  
Vol 7 (79) ◽  
pp. 50106-50112 ◽  
Author(s):  
Yanlin Yu ◽  
Lei Yan ◽  
Zhining Xia
Keyword(s):  
Latent Fingerprints ◽  
Au Nanoclusters ◽  
Latent Fingerprint ◽  
Latent Fingerprint Development ◽  
Montmorillonite Nanocomposites

Latent fingerprints visualized by using as-prepared AuNCs@MMT nanocomposites powders as a fluorescent developing reagent on a ceramic mug.

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