Ashutosh Tiwari
Abstract
In this pandemic year, International Association of Advanced Materials (IAAM) has endeavoured to recognize the best efforts of researchers for their overall efforts to combat COVID-19 in order to select the recipient of the prestigious title of ‘Researcher of the Year’. As an international ...
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In this pandemic year, International Association of Advanced Materials (IAAM) has endeavoured to recognize the best efforts of researchers for their overall efforts to combat COVID-19 in order to select the recipient of the prestigious title of ‘Researcher of the Year’. As an international organization actively working in the scientific community, International Association of Advanced Materials is quite concerned in this time of COVID-19 outbreak. The organization has prioritized all its operations to make valuable contributions to the advanced materials community in this time of need. IAAM believes that the adaptation of advanced technologies and their logical integration according to contemporary healthcare measures could be a smart strategy for COVID-19 management.
Hitesh P. Chauhan; Abhishek Soni; Dr. Vipul Kheraj; Dr. Bharatkumar Z. Dholakiya
Abstract
Immunoassays are the most reliable andcost-effective for the diagnosis of various diseases also the common platform that helps us identify the unknown protein in a short period of time. The market is flooded with different types of diagnostic immunoassays but it is necessary to develop more cost-effective ...
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Immunoassays are the most reliable andcost-effective for the diagnosis of various diseases also the common platform that helps us identify the unknown protein in a short period of time. The market is flooded with different types of diagnostic immunoassays but it is necessary to develop more cost-effective immunoassay with increased performance. The major cost factor in this regard is the quality and amount of biomolecules that are being utilized in the product. Optimization of biomolecules can aid us in developing cost-effective products without compromising its performance. This study aims to optimize the maximum amount of antibodies that can be conjugated on commonly used 40 nm gold nanoparticles that are indicators for the conclusion of test results. The excess usage of antibody may increase unnecessary product cost as it may get eliminated during the washing steps, while the lower amount of antibody usage may reduce the product’s performance in terms of sensitivity and stability. This study helps the manufacturer and researchers to find the optimum value of antibody molecules that can be conjugated on the surface of 40 nm gold nanoparticles. According to this study, ~3.4µg of antibody molecules is sufficient to saturate the surface of 40 nm gold nanoparticles of optical density 1.0.
Manas Sarkar; Moumita Maiti; Muhammad Akbar Malik; Shilang Xu
Abstract
In concrete industry, geopolymer acts as an alternative building material of ordinary cement and possess similar/greater mechanical strength and durability, fashioned by industrial by-product; fly ash with alkaline activator. Accompanied by the chemical corrosion, biogenic corrosion is a foremost obstruction ...
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In concrete industry, geopolymer acts as an alternative building material of ordinary cement and possess similar/greater mechanical strength and durability, fashioned by industrial by-product; fly ash with alkaline activator. Accompanied by the chemical corrosion, biogenic corrosion is a foremost obstruction in sewer systems, bridge piers, pipelines and offshore platforms. The present works has been given an effort to introduce an anti-bio deteriorate sustainable geopolymer (GMZnO–Si) through the decoration of spherical nano silica (Si) on zinc oxide Nano-rods (ZnO NRs) surface. XRD, Zeta potential, FESEM, EDS and XPS were hired for the characterization of ZnO-SiO2 nanohybrid system and applicability of GMZnO–Si mortar was investigated against microbial species (E. coli, S. aureus, A. niger). MIC/MBC/MFC values, agar plating, Inner permeability assay and ROS generation results exhibited excellent mechanistic approaches, by showing its ability to resist the biogenic degradation. The mechanical and durability activities of the GMZnO–Si are found considerably higher in respect to conventional control samples. The experimental outcomes propose a promising way to inclusion of ZnO-SiO2 modified geopolymer for biodeterioration-resistant structure with significant mechanical properties in near future.
Ahmed Suhail; Genhua Pan; Kamrul Islam; David Jenkins; Angela Milne
Abstract
We demonstrate a high-efficiency graphene/Si Schottky junction solar cell with an easy to fabricate graphene back-contact structure and effective chemical treatments. This device effectively overcame the current challenges associated with reported graphene/Si Schottky solar cell structures. The short-circuit ...
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We demonstrate a high-efficiency graphene/Si Schottky junction solar cell with an easy to fabricate graphene back-contact structure and effective chemical treatments. This device effectively overcame the current challenges associated with reported graphene/Si Schottky solar cell structures. The short-circuit current density for such a device is increased by around 20% due to the increase of the active area of this device, compared to previous graphene/Si Schottky junction solar cell devices. The undesirable s-shaped kink in J-V curves, as found in previous works, have been eliminated by using Formamide treatment for 30 min prior to an annealing process in the forming gas. The fill factor of this device is improved by 40% after this treatment, due to the effective removal of the unwanted PMMA residue. Moreover, volatile oxidant vapour and anti-reflection coating are applied within the fabrication process for this device to further improve solar cell performance. An efficiency of 9.5% has successfully been achieved for the fabricated device using the fabrication techniques developed in this work. Our device presents a viable and achievable approach to preparing low-cost and high-performance graphene/Si Schottky junction solar cells.
Alagan Jeevika; Raj Sarika; Dhesingh Ravi Shankaran
Abstract
In this work, we have investigated the uses of herbal extract of Terminalia bellerica (T.bellerica) as an efficient reducing as well as capping agent for reliable green synthesis of silver nanoparticles (AgNPs) at room temperature. HR-TEM results of AgNPs confirmed that, the nanoparticles are spherical ...
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In this work, we have investigated the uses of herbal extract of Terminalia bellerica (T.bellerica) as an efficient reducing as well as capping agent for reliable green synthesis of silver nanoparticles (AgNPs) at room temperature. HR-TEM results of AgNPs confirmed that, the nanoparticles are spherical in shape with an average diameter of ~30 ± 6 nm. XRD shows that, AgNPs exhibits the face centered cubic (FCC) structure. AgNPs utilized as a nanosensor probe for detection of mercury ions (Hg 2+ ). AgNPs showed a color change from brownish yellow to colorless on exposed to Hg 2+ due to the redox reaction of mercury and silver. This sensor probe showed a lower limit of detection of 0.3 ± 0.005 µM. Selectivity of the sensor has been evaluated towards other environmentally heavy metal ions and found that, this sensor is highly selective to Hg 2+ . AgNPs loaded poly (vinylalcohol) (PVA) films and nanofibers were fabricated by solvent casting and electrospinning methods, respectively. AgNPs loaded PVA films and nanofibers were tested for anti-bacterial studies against E. coli and B. subtils. The results indicate that the green synthesized AgNPs possess high microbial activity towards E.coli. These AgNPs based functional materials have great potential for application in sensors, anti-microbial coatings, wound dressing and smart textiles.
M. Farukh;S.K.Dhawan
Abstract
The paper reports the designing of PEDOT grafted PU foam by in-situ emulsion polymerization of ethylene dioxy thiophene (EDOT) on polyurethane foam (PU) containing multi-walled carbon nanotube (MWCNT) and by coating PEDOT on PU foam and to study their antistatic and electromagnetic shielding behavior. ...
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The paper reports the designing of PEDOT grafted PU foam by in-situ emulsion polymerization of ethylene dioxy thiophene (EDOT) on polyurethane foam (PU) containing multi-walled carbon nanotube (MWCNT) and by coating PEDOT on PU foam and to study their antistatic and electromagnetic shielding behavior. Static decay time measurements reveal that PEDOT grafted PU foam shows static decay time ranging from 0.17 sec to 0.75 sec on going down from 5000 v to 500 volts. EMI shielding measurement of the foam in Ku-band shows a shielding attenuation of 8-10 dB which indicates that that the foam can find applications as antistatic encapsulation material in electronic packaging of high tech equipments. SEM studies of the foam shows a uniform coating of PEDOT on PU foam leading to better conductivity of the conducting foam which accounts for its better anti-static properties.
Kwon-Jai Lee; Jeung Hee An; Jae-Soo Shin; Dong-Hee Kim; Kang-Hyun Chung
Abstract
In this study, the anti-tumor activity of hederagenin-loaded magnetic nanoparticles (HMP) was examined in cancer cells. Composite nanoparticles with an average size of 32.5 nm were prepared using a chemical co-precipitation technique. The characteristics of the particles were determined via X-ray diffraction, ...
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In this study, the anti-tumor activity of hederagenin-loaded magnetic nanoparticles (HMP) was examined in cancer cells. Composite nanoparticles with an average size of 32.5 nm were prepared using a chemical co-precipitation technique. The characteristics of the particles were determined via X-ray diffraction, field emission scanning electron microscopy, attenuated total reflectance fourier transform-infrared spectroscopy, and energy-dispersive X-ray spectroscopy. A 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay showed that the magnetic nanoparticles were non-toxic against cancer. In particular, HMPs were cytotoxic at 73.12 % breast cancer (MCF-7), at 70.2 % against prostate cancer (DU145 cells), at 72.15 % against neuroblastoma cancer cells (U87), at 579.15 % in human brain cancer cells (SH-SY5Y), and at 74.5 % in human cervical cancer cells (HeLa) at 250 mg/mL. Our results demonstrated the biological applicability of HMPs as anticancer agents and as agents for enhanced drug delivery against human prostate cancer cells. Our results indicate that the magnetic nanoparticles were biostable and that HMPs functioned effectively as drug delivery vehicles.
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