Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Dendritic fibrous nanosilica: all-in-one nanomaterial for energy, environment and health

06.11.2017

Dendritic fibrous nanosilica (DFNS) attracted a great deal of attention in a large number of scientific disciplines such as catalysis, solar energy harvesting (photocatalysis, solar cells, etc.), energy storage, self-cleaning antireflective coatings, surface plasmon resonance (SPR)-based ultra-sensitive sensors, CO2 capture, and biomedical applications (drug delivery, protein and gene delivery, bioimaging, photothermal ablation, Ayurvedic and radiotherapeutics drug delivery, etc.).

As discussed in this review, the unique fibrous morphology of the DFNS family of materials bestows them with several important properties that were brilliantly exploited for use in a range of applications. The fibers of DFNS were functionalized with a range of organic groups, ionic liquids, organometallic complexes, polymers, peptides, enzymes, DNA, genes, etc.


Dendritic fibrous nanosilica (DFNS), also known as KCC-1, has a unique fibrous morphology and a high surface area with improved accessibility to the internal surface, tunable pore size and volume, controllable particle size, which made it useful in the fields of energy, environment, and health.

Credit: Ayan Maity, Vivek Polshettiwar

They were also loaded with metal nanoparticles, bi-metallic nanoparticles, even with single atoms of metals, quantum dots, and metal oxides and hydroxides. They were also used as hard templates for the synthesis of high surface area carbon with fibrous morphology. DFNS-based zeolites were also synthesized with unique activities.

DFNS provided a means to load large amount of catalytic active sites with exceptionally high accessibility compared to conventional mesoporous silica materials. Additionally, due to the radially oriented pores (channels), the size of which increased from the center of the sphere to its outer surface, reactants were able to easily access active sites within the channels, increasing their interaction with catalytic sites. This led to a multifold increase in their catalytic activity.

... more about:
»DNA »Tata »coating »enzymes »genes »morphology »synthesis

DFNS was cleverly used to develop novel photocatalysts by coating with g-C3N4 and TiO2. The fibrous morphology of DFNS not only facilitated mass transfer and improved accessibility but also facilitated the formation of a uniform conformal coating and a high loading of semiconductors and guest molecules.

Notably, due to the fibrous structure of the material, the light harvesting properties of the catalyst were enhanced due multiple scattering effects and the reflection of a large amount of incident light. DFNS was also used to improve the performance of dye sensitized solar cells (DSSCs). In addition to energy harvesting, DFNS-coated carbon spheres were also used for energy storage using supercapacitors.

Functionalized DFNS, such as DFNS-amines and DFNS-oxynitrides, were successfully used to develop efficient CO2 sorbents, which could contribute in tackling the potentially dangerous climate change issue. Functionalized DFNS was also used to remove pollutants such as toxic metal ions, phosphorus, polyaromatic hydrocarbons, etc. from water bodies, which is a serious environmental concern.

DFFNS was efficiently used to deliver various anti-cancer drugs, and even the delivery of the Ayurvedic drug curcumin, DNA, genes and antimicrobial enzymes was achieved. In addition, a number of auxiliary functions were integrated into DFNS, such as stimuli responsiveness (light to thermal), fluorescence, radioactivity, anti-reflectance, superhydrophobicity, etc. This allows for their application in photothermal ablation therapy, real-time bioimaging, self-cleaning coatings, etc.

The sensing and quantification of pollutants was achieved using DFNS-based surface plasmon resonance (SPR). It was also used for an ultrasensitive enzyme-linked immunosorbent assay (ELISA+) with a 2000-fold enhancement in detection sensitivity.

DFNS seems like All-in-one-Nanomaterial and have huge potential for future development. Although DFNS has been gifted with excellent textural, physical and chemical properties and shows exceptional results in various applications, the evolution of DFNS from fundamental research studies in the laboratory to being used in industry will depend on collaborations between academic researchers and industry.

Thus, remarkable advances in the synthesis and applications of DFNS were achieved, and DFNS seems to have demonstrated great potential as a superior alternative to conventional silica materials such as Stöber silica, MSN, MCM-41, and SBA-15, among others. The low cost, high activity and pronounced stability of numerous dendritic fibrous nanosilica-based materials support our argument that this class of material will find practical use for a range of applications, from catalysis, to gas capture, from energy harvesting and storage to drug delivery, from analytical chemistry to environmental remediation and more.

Media Contact

Prof. Vivek Polshettiwar
vivekpol@tifr.res.in
91-845-288-6556

http://www.tifr.res.in 

Prof. Vivek Polshettiwar | EurekAlert!

Further reports about: DNA Tata coating enzymes genes morphology synthesis

More articles from Materials Sciences:

nachricht Nanocrystal 'factory' could revolutionize quantum dot manufacturing
18.03.2019 | North Carolina State University

nachricht Design and validation of world-class multilayered thermal emitter using machine learning
15.03.2019 | National Institute for Materials Science, Japan

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Revealing the secret of the vacuum for the first time

New research group at the University of Jena combines theory and experiment to demonstrate for the first time certain physical processes in a quantum vacuum

For most people, a vacuum is an empty space. Quantum physics, on the other hand, assumes that even in this lowest-energy state, particles and antiparticles...

Im Focus: Sussex scientists one step closer to a clock that could replace GPS and Galileo

Physicists in the EPic Lab at University of Sussex make crucial development in global race to develop a portable atomic clock

Scientists in the Emergent Photonics Lab (EPic Lab) at the University of Sussex have made a breakthrough to a crucial element of an atomic clock - devices...

Im Focus: Sensing shakes

A new way to sense earthquakes could help improve early warning systems

Every year earthquakes worldwide claim hundreds or even thousands of lives. Forewarning allows people to head for safety and a matter of seconds could spell...

Im Focus: A thermo-sensor for magnetic bits

New concept for energy-efficient data processing technology

Scientists of the Department of Physics at the University of Hamburg, Germany, detected the magnetic states of atoms on a surface using only heat. The...

Im Focus: The moiré patterns of three layers change the electronic properties of graphene

Combining an atomically thin graphene and a boron nitride layer at a slightly rotated angle changes their electrical properties. Physicists at the University of Basel have now shown for the first time the combination with a third layer can result in new material properties also in a three-layer sandwich of carbon and boron nitride. This significantly increases the number of potential synthetic materials, report the researchers in the scientific journal Nano Letters.

Last year, researchers in the US caused a big stir when they showed that rotating two stacked graphene layers by a “magical” angle of 1.1 degrees turns...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

International Modelica Conference with 330 visitors from 21 countries at OTH Regensburg

11.03.2019 | Event News

Selection Completed: 580 Young Scientists from 88 Countries at the Lindau Nobel Laureate Meeting

01.03.2019 | Event News

LightMAT 2019 – 3rd International Conference on Light Materials – Science and Technology

28.02.2019 | Event News

 
Latest News

Researchers measure near-perfect performance in low-cost semiconductors

18.03.2019 | Power and Electrical Engineering

Nanocrystal 'factory' could revolutionize quantum dot manufacturing

18.03.2019 | Materials Sciences

Long-distance quantum information exchange -- success at the nanoscale

18.03.2019 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>