This paper proposes an alternative solution to multimetal deposition (MMD) for the development of latent fingermarks on non-porous and porous surfaces. MMD offers a good sensitivity, however it is very time-consuming and requires many reagents to be carried out. Single-metal deposition (SMD) replaces the silver enhancement of the gold colloids by a gold enhancement procedure. This reduces the number of baths by one as well as the number of reagents and their cost, utilizes reagents with a longer shelf life, and most importantly reduces the labor-intensity of the procedure. It offers quasi-identical results to MMD and thus makes a very attractive alternative.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.forsciint.2006.12.009 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The sp Hybridization of Tin Single Atoms for Dendrite-Free Sodium Metal Batteries.
Adv Mater
January 2025
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Restricting the growth of sodium (Na) dendrites at the atomic level is the premise to enable both the stability and safety of sodium metal batteries (SMBs). Here, the universal synthesis of the fourth main group element (Sn, Ge, Pb) as single metal atoms anchored on graphene (Sn, Ge, Pb SAs/G) with sp hybridization for dendrite-free sodium metal anode is reported. The in situ real-time observation of Na growth on Sn SAs/G uncoils a kinetically uniform planar deposition at the atomic level for substantially suppressing the dendrite growth.
View Article and Find Full Text PDFSingle-Particle ICP-TOFMS Analysis of Aerosol Particulate Matter Released by Fused Deposition Modeling 3D Printers.
Anal Chem
December 2024
Department of Chemistry, Iowa State University, Ames, Iowa 50011-2140, United States.
Additive manufacturing or 3D printing is rapidly growing in popularity. This growth brings increased interest in studying the byproducts released during 3D printing. In this work, we present a new method to collect and analyze the metal composition of individual particles released during the operation of fused deposition modeling (FDM) 3D printers using single-particle inductively coupled plasma time-of-flight mass spectrometry (spICP-TOFMS).
View Article and Find Full Text PDFScalable hot carrier-assisted silicon photodetector array based on ultrathin gold film.
Nanophotonics
March 2024
Nanophotonics Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.
Silicon (Si) offers cost-effective production and convenient on-chip integration for photodetection due to its well-established CMOS technology. However, the indirect bandgap of Si inherently limits its detection efficiency in the near-infrared (NIR) regime. Here, we propose a strategy to achieve high NIR photoresponse in Si by introducing a strong light-absorbing ultrathin gold (Au) film to generate hot carriers.
View Article and Find Full Text PDFNonprecious Single Atom Catalyst for Methane Pyrolysis.
Molecules
September 2024
Chemical Engineering Department, New Mexico Tech, Socorro, NM 87801, USA.
The development of a suitable catalytic system for methane pyrolysis reactions requires a detailed investigation of the activation energy of C-H bonds on catalysts, as well as their stability against sintering and coke formation. In this work, both single-metal Ni atoms and small clusters of Ni atoms deposited on titanium nitride (TiN) plasmonic nanoparticles were characterized for the C-H bond activation of a methane pyrolysis reaction using ab initio spin-polarized density functional theory (DFT) calculations. The present work shows the complete reaction pathway, including energy barriers for C-H bond activation and dehydrogenated fragments, during the methane pyrolysis reaction on catalytic systems.
View Article and Find Full Text PDFSpin Manipulation of Heterogeneous Molecular Electrocatalysts by an Integrated Magnetic Field for Efficient Oxygen Redox Reactions.
Adv Mater
November 2024
School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, NSW, 2006, Australia.
Understanding the spin-dependent activity of nitrogen-coordinated single metal atom (M-N-C) electrocatalysts for oxygen reduction and evolution reactions (ORR and OER) remains challenging due to the lack of structure-defined catalysts and effective spin manipulation tools. Herein, both challenges using a magnetic field integrated heterogeneous molecular electrocatalyst prepared by anchoring cobalt phthalocyanine (CoPc) deposited carbon black on polymer-protected magnet nanoparticles, are addressed. The built-in magnetic field can shift the Co center from low- to high-spin (HS) state without atomic structure modification, affording one-order higher turnover frequency, a 50% increased HO selectivity for ORR, and a ≈4000% magnetocurrent enhancement for OER.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!