Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Laser Induced Forward Transfer


Impact of Laser Induced Forward Transfering on Transfer of Escherichia Coli Bacteria

Adawiya J. Haider; Amer T. Tawfeeq; Amar H. Jareeze

Engineering and Technology Journal, 2014, Volume 32, Issue 5, Pages 885-891

Laser Induced Forward Transfer (LIFT) is a technique uses to print different materials with high spatial resolution for microarray preparation. In this work, the mechanism in which LIFT process effect E.coli bacteria used to produce microarray droplets from a liquid solution thin film coated a glass slide previously coated with gold of 65nm thick which was used as a laser absorbing layer. The transferred bacteria was achieved at laser fluence of 10 J/cm2 and 100 µm distance between donor and receptor substrates.
The purpose of using such a technique was to assess the impact of laser on the viability of the transferred bacteria. Scanning electron microscope observation indicated that E.coli bacterial cells integrity was maintained during the process. The bacteria was viable as tested using MacConkey agar culture media.

Thin Films Ablation by Induced Forward Transfer Technique

Adawiya J. Haider; Iman H. Hadi

Engineering and Technology Journal, 2012, Volume 30, Issue 8, Pages 1405-1414

Laser-Induced Forward Transfer (LIFT) is a technique which enables the
controlled transfer of a thin film material from a transparent carrier (donor) to a
receiver substrate (acceptor). The receiver substrate is usually placed in parallel
and close to the thin film source under air or vacuum conditions. In this work
microdeposition of gold (Au) and Copper (Cu) thin films were deposited on glass
substrate by Pulsed Laser Deposition (PLD). These thin films were irradiated by a
single pulse and transferred to a silver (Ag) and silicon (Si) receiver substrates. The
laser source used for this study was a Nd-YAG Q-Switching second harmonic
generation (SHG) Pulsed Laser with a wavelength 532nm, repetition rate 1-6 Hz
,and pulse duration 10ns. Deposited size, morphology and adhesion to the receiver
substrate as a function of applied laser fluence are investigated.