Surface modifiers through redox routes emerged as the most preferred in forensic science. Aryldiazonium salts stabilized with tetrachloroaurate (III) are excellent development of latent fingerprints on nickel surfaces. Nickel coins were fingerprinted and developed a stable diazonium salt [O2N-4-C6H4N?N]AuCl4. The surfaces studied using XPS that showed presence characteristic gold organic modifi...

This research involved synthesizing two compounds as derivatives of 2-naphthol by the classical method. The azo coupling compound was prepared via diazonium salt 4-amino acetophenone followed 2-naphthole. azo-Schiff molecule synthesized through condensation an with 5-amino salicylic acid in acidic medium. Using spectrum approaches, new are characterized (13C-NMR, 1H-NMR, FT-IR). acid-base chara...

Tailoring the surface properties of 2D materials, such as transition metal dichalcogenides (TMDCs), at nanoscale is becoming essential in fabrication various material-based nanoelectronic devices. Due to chemical inertness their basal plane, modification TMDCs limited defective sites, often requiring special treatments, conversion TMDC from its semiconducting into metallic phase. In this work, ...

In this study we have developed a new aptasensor for cadmium (Cd2+) detection in water. Gold electrode surface has been chemically modified by electrochemical reduction of diazonium salt (CMA) with carboxylic acid outward from the surface. This was used amino-modified aptamer immobilization through carbodiimide reaction. Chemical modification characterized cyclic voltammetry (CV) and impedance ...

Contact mode atomic force microscopy (AFM) was used to intentionally scratch a monolayer deposited on a pyrolyzed photoresist film (PPF). The force was set to completely remove the monolayer but not to damage the underlying PPF surface. A line profile determined across the scratch with tapping mode AFM permitted determination of the monolayer thickness from the depth of the scratch. A statistic...

Azoproteins, obtained by the coupling of diazonium ions with the histidyl, tyrosyl, and lysyl groups of proteins, have continued to be materials of utility since their early investigation (1). The ease with which proteins can be modified by this procedure, the variety of aromatic amines that can be used, and the correlation that can be made between the chemical structure of the introduced group...