Recent developments and applications of bioinspired silicification

Jo, Byung Hoon; Kim, Chang Sup; Jo, Young-Woo; Cheong, Hogyun; Joon, Hyung

doi:10.1007/s11814-016-0003-z

Cited by 19 publications

(11 citation statements)

References 105 publications

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“…Spicules can be separated, joined at nodes, or fused by secondary silica (Hooper and Van Soest, 2002). Despite being of great interest for biomaterials research (Jo et al, 2016), the biochemical pathways involved in spicule silicification are not fully understood.…”

Section: Sponge Silicification: the Role Of Enzymatic Processesmentioning

confidence: 99%

Silicon isotopic systematics of deep-sea sponge grounds in the North Atlantic

Hendry

Cassarino

Bates

et al. 2019

Quaternary Science Reviews

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Reconstruction of silica cycling in the oceans is key to a thorough understanding of past climates because of the inherent links between the biogeochemistry of silicifiers and sequestration of organic carbon. Diatoms are one of the most important phytoplankton groups in determining export production from surface waters, and rely largely on upwelling deeper waters as a source of dissolved silicon, an essential nutrient for their growth. Quantification of changes in deep water dissolved silicon concentrations in the past allows a more robust understanding of changes in surface nutrient supply and whole-ocean silicon cycling, but cannot be achieved using surfacederived geochemical archives. In the last few years, there has been increasing focus on the use of geochemical archives in siliceous skeletal elements, or spicules, from seafloor-dwelling sponges to fill this gap. The stable silicon isotopic composition of spicules has been shown to be a function of ambient dissolved silicon, providing a potential archive for past changes in bottom water nutrients. However, biomineralisation processes impact silicon isotope fractionation and silica formed by atypical processes (derived from carnivorous sponges, hypersilicified spicules, and giant basal spicules) result in anomalous geochemical signatures. Furthermore, there is considerable scatter in the calibration between spicule silicon isotopes and dissolved silicon in seawater, even when the atypical groups have been removed. Here, we explore this variability further, by examining aggregation and assemblage-level differences in isotopic fractionation, using silicon isotopic measurements of specimens from two monospecific sponge groups (Pheronema carpenteri and Vazella pourtalesi), and one mixed-species population (genus Geodia) from the North Atlantic. Our new data reveal that variability within the monospecific aggregations is less than mixed-species assemblage, pointing towards a genetic control in isotopic fractionation. However, there is still variability within the monospecific aggregations, which cannot be explained by macroscale environmental differences: such variability is likely a reflection of the physiological health of the individuals, or highly localised heterogeneities in sponge habitats. Other challenges remain in the interpretation of spicule silicon isotopes as proxies for dissolved silicon changes through time, especially when investigating periods of Earth history that extend back considerably further than the residence time of dissolved silicon in the oceans. Despite all the questions still surrounding the use of sponge silicon isotopes in palaeoceanographic applications, they are still the only known archive of bottom water dissolved silicon. Continued efforts to understanding sponge biomineralisation and to incorporate silicon isotopes into oceanic models will help to improve further the reliability of the archive.

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Section: Sponge Silicification: the Role Of Enzymatic Processesmentioning

confidence: 99%

Silicon isotopic systematics of deep-sea sponge grounds in the North Atlantic

Hendry

Cassarino

Bates

et al. 2019

Quaternary Science Reviews

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“…Thus, hybrid particles with a core-shell structure are attracting a great deal of interest because of their diverse applications as catalysts 13 , protective coatings 14 , and drug delivery materials 15 . In addition, the physical features of the hybrid particles with core-shell structure provides a high surface area, controllable morphology and roughness 16 – 19 , protection and encapsulation of the core materials, and the promising conjugation moieties for a variety of chemical and biological molecules 20 – 26 .…”

Section: Introductionmentioning

confidence: 99%

Microfluidic preparation of monodisperse polymeric microspheres coated with silica nanoparticles

Kim

Jin

Jeong

et al. 2018

Sci Rep

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The synthesis of organic-inorganic hybrid particles with highly controlled particle sizes in the micrometer range is a major challenge in many areas of research. Conventional methods are limited for nanometer-scale fabrication because of the difficulty in controlling the size. In this study, we present a microfluidic method for the preparation of organic-inorganic hybrid microparticles with poly (1,10-decanediol dimethacrylate-co-trimethoxysillyl propyl methacrylate) (P (DDMA-co-TPM)) as the core and silica nanoparticles as the shell. In this approach, the droplet-based microfluidic method combined with in situ photopolymerization produces highly monodisperse organic microparticles of P (DDMA-co-TPM) in a simple manner, and the silica nanoparticles gradually grow on the surface of the microparticles prepared via hydrolysis and condensation of tetraethoxysilane (TEOS) in a basic ammonium hydroxide medium without additional surface treatment. This approach leads to a reduction in the number of processes and allows drastically improved size uniformity compared to conventional methods. The morphology, composition, and structure of the hybrid microparticles are analyzed by SEM, TEM, FT-IR, EDS, and XPS, respectively. The results indicate the inorganic shell of the hybrid particles consists of SiO2 nanoparticles of approximately 60 nm. Finally, we experimentally describe the formation mechanism of a silica-coating layer on the organic surface of polymeric core particles.

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“…Several applications in vision such as bacterial sensors (by immobilization of the biosilicaencapsulated bacterial cells on a sensor chip); development of core-shell nanomaterials for nanomedicine applications and 3D cell printing as promising materials for regenerative medicine. Modified biosilica from diatoms was also reported for biomedical applications as for example in drug delivery (Yang et al, 2011;Jo et al, 2016). Frustules from diatoms have been investigated for their potential in biosensing, by exploiting their photoluminescence properties for gas detection.…”

Section: Potential Applications Of Biosilicamentioning

confidence: 99%

Optical Properties of Nanostructured Silica Structures From Marine Organisms

et al. 2018

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Light is important for the growth, behavior, and development of both phototrophic and autotrophic organisms. A large diversity of organisms used silica-based materials as internal and external structures. Nano-scaled well-organized silica biomaterials are characterized by a low refractive index and an extremely low absorption coefficient in the visible range, which make them interesting for optical studies. Recent studies on silica materials from glass sponges and diatoms, have pointed out very interesting optical properties, such as light waveguiding, diffraction, focusing, and photoluminescence. Light guiding and focusing have been shown to be coupled properties found in spicule of glass sponge or shells of diatoms. Moreover, most of these interesting studies have used purified biomaterials and the properties have addressed in non-aquatic environments, first in order to enhance the index contrast in the structure and second to enhance the spectral distribution. Although there is many evidences that silica biomaterials can present interesting optical properties that might be used for industrial purposes, it is important to emphases that the results were obtained from a few numbers of species. Due to the key roles of light for a large number of marine organisms, the development of experiments with living organisms along with field studies are require to better improve our understanding of the physiological and structural roles played by silica structures.

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Recent developments and applications of bioinspired silicification

Cited by 19 publications

References 105 publications

Silicon isotopic systematics of deep-sea sponge grounds in the North Atlantic

Silicon isotopic systematics of deep-sea sponge grounds in the North Atlantic

Microfluidic preparation of monodisperse polymeric microspheres coated with silica nanoparticles

Optical Properties of Nanostructured Silica Structures From Marine Organisms

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