Exploring high frequency optoacoustic method for characterization of nanoparticles

Results in Optics

Ratan K. Saha¹  Anuj Kaushik² 

[1] Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Jhalwa, Allahabad 211015, India;Corresponding author.;

关键词: Optoacoustics;    Nanoparticles;    Shapes;    k-Wave toolbox;   

DOI  :  

来源: DOAJ

【 摘 要 】

Optoacoustic (OA) field computation by utilizing k-Wave simulation toolbox for six commonly used nanoparticles (NPs) has been performed. The characterization of NPs is often accomplished by the numerical simulation approach. Although, these simulation techniques are complicated, very costly, time-taking and arduous. Accordingly, there is a prerequisite for a fast, economical, and a simple simulation approach to comprehend the OA signal produced from different shapes of NPs. The technique has been employed to calculate the OA spectrum produced by nano size shapes [i.e. sphere, oblate, prolate, pentagon, hexagon, and star] over a large frequency band (10–200 GHz). The shapes of NPs were generated by utilizing simple mathematical equations. The first frequency minimum of OA spectrum approximately occurs at 48, 47, 80, 37, 58, and 57 GHz for nano sphere, oblate, prolate, pentagon, hexagon, and star, respectively when calculated in the direction of the symmetry axis. The same spectral feature appears nearly at 48, 22, 21, 32, 30, and 31 GHz, respectively, for those NPs when computed from the perpendicular direction. The NPs structure can be characterized by investigating single NP OA spectrum. The time taken by simulation for each NP is as short as the 12 min (simulated in the desktop having Intel(R) Core(TM) i7-6700U CPU working at 3.4 GHz and having 16 GB RAM) which is a remarkable increment over formerly communicated simulation time of a few hours employing analytical techniques.

【 授权许可】

Unknown