Lensless light focusing with the centric marine diatom Coscinodiscus walesii

Stefano, Luca De; Rea, Ilaria; Rendina, Ivo; Stefano, Mario De; Moretti, Luigi

doi:10.1364/oe.15.018082

Cited by 123 publications

(86 citation statements)

References 14 publications

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“…This effect was attributed to interferences of light scattered in the areolar pores. [32] The authors suggest that such microlenses could be interfaced with optical fibers or surface emitting lasers. Fuhrmann et al suggest that diatoms are living photonic crystals.…”

Section: Formation Of Biophotonic Structuresmentioning

confidence: 99%

Diatomaceous Lessons in Nanotechnology and Advanced Materials

2009

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Silicon, in its various forms, finds widespread use in electronic, optical, and structural materials. Research on uses of silicon and silica has been intense for decades, raising the question of how much diversity is left for innovation with this element. Shape variation is particularly well examined. Here, we review the principles revealed by diatom frustules, the porous silica shells of diatoms, microscopic, unicellular algae. The frustules have nanometer‐scale detail, and the almost 100 000 species with unique frustule morphologies suggest nuanced structural and optical functions well beyond the current ranges used in advanced materials. The unique frustule morphologies have arisen through tens of millions of years of evolutionary selection, and so are likely to reflect optimized design and function. Performing the structural and optical equivalent of data mining, and understanding and adopting these designs, affords a new paradigm in materials science, an alternative to combinatorial materials synthesis approaches in spurring the development of new material and more nuanced materials.

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Section: Formation Of Biophotonic Structuresmentioning

confidence: 99%

Diatomaceous Lessons in Nanotechnology and Advanced Materials

2009

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“…Alternatively, light can be transmitted through the valve with diffraction from the foramen (holes) as the important effect. We are interested in developing a simple description of the multiple interference points described in simulations at a distance corresponding to outside the frustule when light interacts with the valve of the centric species Coscinodiscus granii (C. granii) [10,[12][13][14][15]. These interference points have been discussed on a theoretical basis and a few have been showed experimentally [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Interference patterns and extinction ratio of the diatom Coscinodiscus granii

Maibohm¹,

Friis²,

Ellegaard³

et al. 2015

Opt. Express

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“…First, while providing the structural strength of the frustules, the pore chambers and pores help to control cell weight and allow the cells to float or migrate easily. Second, the pore matrix and the profile of the valves may form into a convex lens to gather light for photosynthesis [13]. Third, the sieve pores have a diameter between the size of nutrients and the size of bacteria [12], which help filter out harmful substances [102].…”

Section: Potential Of Diatom Frustules In Device Applicationmentioning

confidence: 99%

“…The cell wall of a diatom known as the frustule, has a transparent structure composed of amorphous silica [6]. The frustule has good mechanical strength [7,8], a variety of three-dimensional (3D) shapes [9,10], multi-level nanopores and microstructures [11,12], large surface area and unique optical properties [13][14][15], making it a potential novel functional material for bio-manufacturing. Studies on theoretical understanding, manufacturing methods and functionalization of diatom frustules are ongoing.…”

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confidence: 99%

Bio-manufacturing technology based on diatom micro- and nanostructure

et al. 2012

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Diatom frustules, considered as novel bio-functional materials, display a diversity of patterns and unique micro-and nanostructures which may be useful in many areas of application. Existing devices directly use the original structure of the biosilica frustules, limiting their function and structural scale. Current research into the shapes, materials and structural properties of frustules are considered; a series of frustule processing methods including structure processing, material modification, bonding and assembly techniques are reviewed and discussed. The aim is to improve the function of diatom frustules allowing them to meet the design requirements of different types of micro devices. In addition, the importance of the comprehensive use of diatom processing methods in device research is discussed using biosensors and solar cells as examples, and the potential of bio-manufacturing technology based on diatom frustules is examined. Nature presents a wide range of functional structures. Particularly at the micro-and nanoscale, the complexity and functionality of biological structures are far greater than those of equivalent artificial devices, making these biological structures an appropriate subject for biotechnology and bio-manufacturing [1,2]. In our previous studies, we have reported bio-limited forming [3] and bio-replication forming [4,5] methods for manufacturing functional particles or surface morphology from biological structures. Micro devices with highly desirable structure and characteristics could be produced from biological micro-or nanostructures. Single-celled diatoms are widely distributed in rivers, lakes and other water bodies, and have a fast (exponential) reproductive rate. The cell wall of a diatom known as the frustule, has a transparent structure composed of amorphous silica [6]. The frustule has good mechanical strength [7,8], a variety of three-dimensional (3D) shapes [9,10], multi-level nanopores and microstructures [11,12], large surface area and unique optical properties [13][14][15], making it a potential novel functional material for bio-manufacturing. Studies on theoretical understanding, manufacturing methods and functionalization of diatom frustules are ongoing. In the last two centuries, the importance of diatom frustules in the field of micro-and nanotechnology has become increasingly evident. The potential of frustules has been extensively explored by academics and for commercial application. The resulting new theories and techniques have found wide application, leading to the formation of a new interdisciplinary area of research called diatom-based bio-nanotechnology (or diatom nanotechnology) [16][17][18][19][20][21]. The potential for diatoms in device applications, such as high-sensitivity gas sensors [22], drug delivery devices [23], biocarriers for biosensors [24][25][26][27], micro-filters [12,28], solar cells, battery electrodes and electroluminescent display devices [19] has been examined. However, the direct

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Lensless light focusing with the centric marine diatom Coscinodiscus walesii

Cited by 123 publications

References 14 publications

Diatomaceous Lessons in Nanotechnology and Advanced Materials

Diatomaceous Lessons in Nanotechnology and Advanced Materials

Interference patterns and extinction ratio of the diatom Coscinodiscus granii

Bio-manufacturing technology based on diatom micro- and nanostructure

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