Simultaneous UV/Vis spectroscopy and surface enhanced Raman scattering of nanoparticle formation and aggregation in levitated droplets

Schenk, J.; Tröbs, Lisa; Emmerling, Franziska; Kneipp, Janina; Panne, Ulrich; Albrecht, Merwe

doi:10.1039/c2ay05744a

Cited by 40 publications

(32 citation statements)

References 39 publications

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“…For the steel sphere, an experimental b of 3.6 was obtained, which is close to b of 3.4, calculated by using Eq. (12). However, the experimental values of b obtained for the polypropylene and glass spheres differ significantly from the theoretical result.…”

Section: A Axial and Radial Spheres Oscillationscontrasting

confidence: 59%

“…9,10 Acoustic levitation has been applied in the crystallization process of pharmaceuticals, 7,11 analysis of red blood cells by Raman spectroscopy, 6 in simultaneous UV/VIS spectroscopy and Raman scattering of nanoparticles, 12 and in many other experiments. [13][14][15][16] The technique of acoustic levitation is especially useful when dealing with small samples of liquids, because it can prevent sample contamination and adsorption due to the contact with container walls.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of the oscillation of spheres in an acoustic levitator

Andrade

Pérez²,

Adamowski

2014

The Journal of the Acoustical Society of America

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The spontaneous oscillation of solid spheres in a single-axis acoustic levitator is experimentally investigated by using a high speed camera to record the position of the levitated sphere as a function of time. The oscillations in the axial and radial directions are systematically studied by changing the sphere density and the acoustic pressure amplitude. In order to interpret the experimental results, a simple model based on a spring-mass system is applied in the analysis of the sphere oscillatory behavior. This model requires the knowledge of the acoustic pressure distribution, which was obtained numerically by using a linear finite element method (FEM). Additionally, the linear acoustic pressure distribution obtained by FEM was compared with that measured with a laser Doppler vibrometer. The comparison between numerical and experimental pressure distributions shows good agreement for low values of pressure amplitude. When the pressure amplitude is increased, the acoustic pressure distribution becomes nonlinear, producing harmonics of the fundamental frequency. The experimental results of the spheres oscillations for low pressure amplitudes are consistent with the results predicted by the simple model based on a spring-mass system.

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Section: A Axial and Radial Spheres Oscillationscontrasting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Experimental study of the oscillation of spheres in an acoustic levitator

Andrade

Pérez²,

Adamowski

2014

The Journal of the Acoustical Society of America

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“…Raman spectroscopy has attracted great interest as a powerful analytical tool that can be used to detect changes in the structure and composition of analytes at the molecular level [6][7][8][9][10]. It also provides quantitative information, together with high sensitivity and selectivity.…”

Section: Introductionmentioning

confidence: 99%

A simple and rapid detection of tissue adhesive-induced biochemical changes in cells and DNA using Raman spectroscopy

Jung¹,

Lee²,

Lee³

et al. 2013

Biomed. Opt. Express

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Abstract:We demonstrate a cytotoxicity evaluation of tissue adhesive using Raman spectroscopy. This method allows for quantitative, label-free, non-invasive and rapid monitoring of the biochemical changes of cells following tissue adhesive treatment. Here, we show the biochemical property changes in mouse fibroblast L929 cells and cellular DNA following tissue adhesive (Dermabond) treatment using Raman spectroscopy. The Raman band intensities were significantly decreased when the cells were treated with Dermabond as compared to control cells. These results suggest denaturation and conformational changes in proteins and degradation of DNA related to cell death. To support these conclusions, conventional cytotoxicity assays such as WST, LIVE/DEAD, and TUNEL were carried out, and the results were in agreement with the Raman results. Thus, Raman spectroscopy analysis not only distinguishes between viable and damaged cells, but can also be used for identification and quantification of a cytotoxicity of tissue adhesive, which based on the cellular biochemical and structural changes at a molecular level. Therefore, we suggest that this method could be used for cytotoxic evaluation of tissue adhesives by rapid and sensitive detection of cellular changes.

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“…These studies supported N3 adsorption, but did not report N9H tautomerization. Separately, differing orientations might explain SERS band intensity variances for adenine added before or after silver nanoparticle formation …”

Section: Discussionmentioning

confidence: 99%

The Controversial Orientation of Adenine on Gold and Silver

Harroun

2018

ChemPhysChem

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In which orientation does adenine adsorb on gold and silver surfaces? This question has been a matter of debate for over 30 years. Since the dawn of surface-enhanced Raman spectroscopy (SERS); it and other techniques such as tip-enhanced Raman spectroscopy (TERS), surface-enhanced infrared absorption spectroscopy (SEIRAS), scanning tunneling microscopy (STM), density functional theory (DFT) simulations, and more, have been used in many attempts to answer this seemingly straightforward, yet controversial, question. Herein, the timeline and recent advances on this topic are explored, and the frequently contradictory findings are put into context and discussed.

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Simultaneous UV/Vis spectroscopy and surface enhanced Raman scattering of nanoparticle formation and aggregation in levitated droplets

Cited by 40 publications

References 39 publications

Experimental study of the oscillation of spheres in an acoustic levitator

Experimental study of the oscillation of spheres in an acoustic levitator

A simple and rapid detection of tissue adhesive-induced biochemical changes in cells and DNA using Raman spectroscopy

The Controversial Orientation of Adenine on Gold and Silver

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