Photovoltaic tweezers an emergent tool for applications in nano and bio-technology

Carrascosa, M.; Garcı́a-Cabañes, A.; Jubera, Mariano; Elvira, Iris; Burgos, Héctor; Bella, José L.; Agulló‐López, F.; Muñoz-Martínez, Juan F.; Alcázar, A.

doi:10.1117/12.2186173

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…More than a decade elapsed before new experimental results on the trapping of biological matter due to optical ferroelectric excitation was published in 2015 by our group. 39 Both x-cut and z-cut Fe-LN were employed to arrange 1D (x-cut) and 2D (z-cut) patterns of different biological materials: fungi spores (~ 10 µm), and pollen grains (~ 70 µm) and fragments thereof (~ 1-10 µm) in hexane or air. The photoinduced gratings in the LN were excited by interfering patterns of 532 nm laser light.…”

Section: Photovoltaic Effectmentioning

confidence: 99%

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Biological applications of ferroelectric materials

Blázquez‐Castro

Garcı́a-Cabañes

Carrascosa

2018

Applied Physics Reviews

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The study and applications of ferroelectric materials in the biomedical and biotechnological fields is a novel and very promising scientific area that spans roughly one decade. However, some groups have already provided experimental proof of very interesting biological modulation when living systems are exposed to different ferroelectrics and excitation mechanisms. These materials should offer several advantages in the field of bioelectricity, such as no need of an external electric power source or circuits, scalable size of the electroactive regions, flexible and reconfigurable "virtual electrodes", or fully proved biocompatibility. In this focused review we provide the underlying physics of ferroelectric activity and a recount of the research reports already published, along with some tentative biophysical mechanisms that can explain the observed results. More specifically, we focused on the biological actions of domain ferroelectrics, and ferroelectrics excited by the bulk photovoltaic effect or the pyroelectric effect. It is our goal to provide a comprehensive account of the published material so far, and to set the stage for a vigorous expansion of the field, with envisioned applications that span from cell biology and signaling to cell and tissue regeneration, antitumoral action, or cell bioengineering to name a few.

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Section: Photovoltaic Effectmentioning

confidence: 99%

“…Further experiments revealed that Fe-LN NPs (~ 100 nm) displayed a certain cytotoxicity under green light. 39 Unfortunately, the NPs by themselves (no light exposure) showed also a high cytotoxicity.…”

Section: Photovoltaic Effectmentioning

confidence: 99%

Biological applications of ferroelectric materials

Blázquez‐Castro

Garcı́a-Cabañes

Carrascosa

2018

Applied Physics Reviews

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“…The physico-chemical and biological causes of this damage are under study. In a follow-up study we reported that submicrometric (100-200 nm) LiNbO 3 :Fe particles also had a deleterious effect on tumoral cells under visible light excitation [45]. However, the particles toxicity in the dark proved too high, and thus no further research was pursued in this area.…”

Section: Biological Pvt Applicationsmentioning

confidence: 99%

Recent Achievements on Photovoltaic Optoelectronic Tweezers Based on Lithium Niobate

et al. 2018

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Abstract:This review presents an up-dated summary of the fundamentals and applications of optoelectronic photovoltaic tweezers for trapping and manipulation of nano-objects on the surface of lithium niobate crystals. It extends the contents of previous reviews to cover new topics and developments which have emerged in recent years and are marking the trends for future research. Regarding the theoretical description of photovoltaic tweezers, detailed simulations of the electrophoretic and dielectrophoretic forces acting on different crystal configurations are discussed in relation to the structure of the obtained trapping patterns. As for the experimental work, we will pay attention to the manipulation and patterning of micro-and nanoparticles that has experimented an outstanding progress and relevant applications have been reported. An additional focus is now laid on recent work about micro-droplets, which is a central topic in microfluidics and optofluidics. New developments in biology and biomedicine also constitute a relevant part of the review. Finally, some topics partially related with photovoltaic tweezers and a discussion on future prospects and challenges are included.

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LiNbO3: A photovoltaic substrate for massive parallel manipulation and patterning of nano-objects

Carrascosa

Garcı́a-Cabañes

Jubera

et al. 2015

Applied Physics Reviews

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The application of evanescent photovoltaic (PV) fields, generated by visible illumination of Fe:LiNbO 3 substrates, for parallel massive trapping and manipulation of micro-and nano-objects is critically reviewed. The technique has been often referred to as photovoltaic or photorefractive tweezers. The main advantage of the new method is that the involved electrophoretic and/or dielectrophoretic forces do not require any electrodes and large scale manipulation of nano-objects can be easily achieved using the patterning capabilities of light. The paper describes the experimental techniques for particle trapping and the main reported experimental results obtained with a variety of micro-and nano-particles (dielectric and conductive) and different illumination configurations (single beam, holographic geometry, and spatial light modulator projection). The report also pays attention to the physical basis of the method, namely, the coupling of the evanescent photorefractive fields to the dielectric response of the nano-particles. The role of a number of physical parameters such as the contrast and spatial periodicities of the illumination pattern or the particle deposition method is discussed. Moreover, the main properties of the obtained particle patterns in relation to potential applications are summarized, and first demonstrations reviewed. Finally, the PV method is discussed in comparison to other patterning strategies, such as those based on the pyroelectric response and the electric fields associated to domain poling of ferroelectric materials.

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Photovoltaic tweezers an emergent tool for applications in nano and bio-technology

Cited by 3 publications

References 13 publications

Biological applications of ferroelectric materials

Biological applications of ferroelectric materials

Recent Achievements on Photovoltaic Optoelectronic Tweezers Based on Lithium Niobate

LiNbO3: A photovoltaic substrate for massive parallel manipulation and patterning of nano-objects

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