Abstract

Laser-induced breakdown spectroscopy (LIBS) was used as a method to monitor the evolution of C, hydrogen-α, carbon-carbon, and carbon-nitrogen spectral emissions from atmospheric recombination in a specific set of organic materials. Ablated samples were composed of a series of linear chain dicarboxylic acids with two to seven C atoms. Accumulated pulses of a focused neodymium-doped yttrium aluminum garnet (Nd:YAG) Q-switched laser beam operated at 532 nm generate a plasma in air at the sample surface. In this work, a dual-pulse LIBS technique was used to improve signal strength by enhancing the nanosecond LIBS plasma with CO₂ transverse-excited breakdown in atmosphere laser pulses with an operating wavelength of 10.6 μm. Through a time-resolved analysis, we demonstrate the correlation between the signal strength of selected emissions and the number of C atoms in the linear chain. We also illustrate the effects that these constraints, along with the presence of a chiral C in the chain, have on the peak intensities of the individual lines with respect to each other by comparing the increase or nonexistence of certain spectral lines as we increase the number of C atoms in the linear chain.

Nd:YAG-CO₂ double-pulse laser induced breakdown spectroscopy of organic films

Matthew Weidman, Matthieu Baudelet, Santiago Palanco, Michael Sigman, Paul J. Dagdigian, and Martin Richardson
Opt. Express 18(1) 259-266 (2010)

Identification of atomic lines and molecular bands of benzene and carbon disulfide liquids by using LIBS

S. J. Mousavi, M. Hemati Farsani, S. M. R. Darbani, N. Asadorian, M. Soltanolkotabi, and A. Eslami Majd
Appl. Opt. 54(7) 1713-1720 (2015)

Enhancement of Nd:YAG LIBS emission of a remote target using a simultaneous CO₂ laser pulse

Dennis K. Killinger, Susan D. Allen, Robert D. Waterbury, Chris Stefano, and Edwin L. Dottery
Opt. Express 15(20) 12905-12915 (2007)

Enhanced temperature and emission from a standoff 266 nm laser initiated LIBS plasma using a simultaneous 10.6 μm CO₂ laser pulse

Avishekh Pal, Robert D. Waterbury, Edwin L. Dottery, and Dennis K. Killinger
Opt. Express 17(11) 8856-8870 (2009)

In situ chemical analysis of geology samples by a rapid simultaneous ultraviolet/visible/near-infrared (UVN) + longwave-infrared laser induced breakdown spectroscopy detection system at standoff distance

Clayton S. C. Yang, Feng Jin, Sudhir Trivedi, Ei Brown, Uwe Hömmerich, Laszlo Nemes, and Alan C. Samuels
Opt. Express 27(14) 19596-19614 (2019)