Development of Well-Preserved, Substrate-Versatile Latent Fingerprints by Aggregation-Induced Enhanced Emission-Active Conjugated Polyelectrolyte

2017 ◽  
Vol 9 (42) ◽  
pp. 37501-37508 ◽  
Author(s):  
Akhtar Hussain Malik ◽  
Anamika Kalita ◽  
Parameswar Krishnan Iyer
Keyword(s):  
Latent Fingerprints ◽  
Conjugated Polyelectrolyte

Surfactant chemistry for fluorescence imaging of latent fingerprints using conjugated polyelectrolyte nanoparticles

2015 ◽  
Vol 51 (71) ◽  
pp. 13634-13637 ◽  
Author(s):  
Beomsu Shin-Il Kim ◽  
Young-Jae Jin ◽  
Mohammad Afsar Uddin ◽  
Toshikazu Sakaguchi ◽  
Han Young Woo ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Polymer Nanoparticles ◽  
Latent Fingerprints ◽  
Conjugated Polyelectrolyte

The polymer nanoparticles were readily transferred to the LFP to reveal highly distinguishable fluorescent images under the presence of surfactant with appropriate HLB value.

Tropolone-Based Treatments for Visualising Latent Fingermarks on Porous Surfaces

2019 ◽  
Author(s):  
Clara M. Agapie ◽  
Melissa Sampson ◽  
William Gee
Keyword(s):  
Amino Acids ◽  
Uv Radiation ◽  
Membered Ring ◽  
Diazonium Salts ◽  
Chemical Detection ◽  
Latent Fingerprints ◽  
Porous Surfaces

The work describes a new chemical means of visualising latent fingerprints (fingermarks) using tropolone. Tropolone reacts with amino acids within the fingermark residue to form adducts that absorb UV radiation. These adducts provide useful contrast on highly-fluorescent prous surfaces will illuminated with UV radiation. The conjugated seven-membered ring of the tropolone adduct can be reacted further diazonium salts, which is demonstrated here with formation of two dyes. The methodology is extremely rapid, occurring in minutes with mild heating, and can be applied before ninhydrin in a chemical detection sequence. <br>

Cationic π-Conjugated Polyelectrolyte Shows Antimicrobial Activity by Causing Lipid Loss and Lowering Elastic Modulus of Bacteria

2020 ◽  
Vol 12 (44) ◽  
pp. 49346-49361
Author(s):  
Ehsan Zamani ◽  
Tyler J. Johnson ◽  
Shyambo Chatterjee ◽  
Cheryl Immethun ◽  
Anandakumar Sarella ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Elastic Modulus ◽  
Conjugated Polyelectrolyte

scholarly journals New Hybrid Copper Nanoparticles/Conjugated Polyelectrolyte Composite with Antibacterial Activity

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 401
Author(s):  
Ignacio A. Jessop ◽  
Yasmín P. Pérez ◽  
Andrea Jachura ◽  
Hipólito Nuñez ◽  
Cesar Saldías ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Copper Nanoparticles ◽  
Salmonella Enteritidis ◽  
Theoretical Calculations ◽  
Chemical Reduction ◽  
Metallic Copper ◽  
Resistant Bacteria ◽  
Small Contribution ◽  
Antibiotic Resistant ◽  
Conjugated Polyelectrolyte

In the search for new materials to fight against antibiotic-resistant bacteria, a hybrid composite from metallic copper nanoparticles (CuNPs) and a novel cationic π-conjugated polyelectrolyte (CPE) were designed, synthesized, and characterized. The CuNPs were prepared by chemical reduction in the presence of CPE, which acts as a stabilizing agent. Spectroscopic analysis and electron microscopy showed the distinctive band of the metallic CuNP surface plasmon and their random distribution on the CPE laminar surface, respectively. Theoretical calculations on CuNP/CPE deposits suggest that the interaction between both materials occurs through polyelectrolyte side chains, with a small contribution of its backbone electron density. The CuNP/CPE composite showed antibacterial activity against Gram-positive (Staphylococcus aureus and Enterococcus faecalis) and Gram-negative (Escherichia coli and Salmonella enteritidis) bacteria, mainly attributed to the CuNPs’ effect and, to a lesser extent, to the cationic CPE.

scholarly journals A pyridinium-pended conjugated polyelectrolyte for efficient photocatalytic hydrogen evolution and organic solar cells

2021 ◽  
Author(s):  
Muhammad Rafiq ◽  
Jianhua Jing ◽  
Yuanying Liang ◽  
Zhicheng Hu ◽  
Xi Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Hydrogen Evolution ◽  
Organic Solar Cells ◽  
Conjugated Polyelectrolyte ◽  
Photocatalytic Hydrogen Evolution ◽  
Doping Behaviour

A pyridinium-pended conjugated polyelectrolyte with photo-induced amine doping behaviour was designed for multiple applications.

Rapid visualization of latent fingerprints using novel CaSiO3:Sm3+ nanophosphors fabricated via ultrasound route

2019 ◽  
Vol 37 (1) ◽  
pp. 32-44 ◽  
Author(s):  
R.B. Basavaraj ◽  
G.P. Darshan ◽  
B. Daruka Prasad ◽  
S.C. Sharma ◽  
H. Nagabhushana
Keyword(s):  
Latent Fingerprints
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