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Special surface wettability attracts significant attention. In this study, dramatic differences in wettability are demonstrated for microparticles with the same chemical composition, SiO2. One is natural silica prepared from diatom, Melosira nummuloides, and the other is synthetic silica. We found that surface properties of synthetic silica are hydro- and hemophobic. However, diatom frustule silica exhibits superhydrophilicity and even super-hemophilicity. Interestingly, such superhydrophilicity of natural silica is not solely originated from nanoporous structures of diatom but from the synergy of high density silanol anions and nanoarchitecture. Furthermore, the observation of super-hemophilicity of natural silica is also an interesting finding, because not all superhydrophilic surfaces show superhemophilicity. We demonstrate that super-hemowettability is a fundamental principle for developing micro-powder based hemostatic materials despite existing hemorrhaging studies using diatom.
This article was published in the following journal.
Name: ACS nano
Diatom frustules, with their diverse three-dimensional regular silica structures and nano- to micrometer dimensions, represent perfect model systems for biomimetic fabrication of materials and devices...
Existing techniques for the preparation of silica structures from diatom cells include cleaning of frustules through baking at high temperature and oxidant cleaning using concentrated sulfuric acid, h...
While different microalgae tend to be associated with different bacteria, it remains unclear if such specific associations are beneficial for the microalgae. We assessed the impact of bacterial isolat...
The mechanisms underlying interactions between diatoms and bacteria are crucial to understand diatom behaviour and proliferation, and can result in far-reaching ecological consequences. Recently, 2-al...
We report a heavily Yb3+/Al3+/B3+/F- co-doped high silica rod with a negative refractive index relative to pure silica. The high silica rod was fabricated from nanoporous silica rod by the glass phase...
The purpose of this study is to determine whether spherical silica can achieve similar or greater extrinsic dental stain and plaque removal, in comparison to dentifrices containing higher ...
The aim of the present study was to determine whether oral dosing, up to 9 grams/day, of porous silica administered as a food additive can be used safely in normal weight and obese male hu...
The objective of the present study was to compare the effects of a commercially available dentifrice containing 10% high cleaning silica base, versus a control dentifrice, containing norma...
Various regenerative procedures used for the treatment of intabony defects.The Aim of this study is to compare the treatment outcome of bioactive silica graft with platelet rich fibrin Vs ...
A clinical and radiographic evaluation of Nano-crystalline hydroxyapatite silica gel in comparison with bone allograft and open flap debridement for management of periodontal intrabony def...
A non-crystalline form of silicon oxide that has absorptive properties. It is commonly used as a desiccating agent and as a stationary phase for CHROMATOGRAPHY. The fully hydrated form of silica gel has distinct properties and is referred to as SILICIC ACID.
A poly(dimethylsiloxane) which is a polymer of 200-350 units of dimethylsiloxane, along with added silica gel. It is used as an antiflatulent, surfactant, and ointment base.
The generic term for salts derived from silica or the silicic acids. They contain silicon, oxygen, and one or more metals, and may contain hydrogen. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th Ed)
A form of pneumoconiosis resulting from inhalation of dust containing crystalline form of SILICON DIOXIDE, usually in the form of quartz. Amorphous silica is relatively nontoxic.
A solventless sample preparation method, invented in 1989, that uses a fused silica fiber which is coated with a stationary phase. It is used for sample cleanup before using other analytical methods.