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Showing posts from January, 2021

Detection of Cancer via New Nano-Based Imaging Agents

New imaging agents were developed by physicians to detect cancer with better specificity and sensitivity. Further, they have the potential to significantly improve patient outcomes. It could offer enhanced premature cancer cells detection during routine screening and help the surgeons to identify tumor margins for surgical resection. Figure 1. In vivo visualization of 200 nm G8-liposomes imaged following intravenous injection [ 1 ]. Notice the bright accumulation and homogenous appearance of liposomes encapsulated with G8 dye (green). The vasculature region depicted here is of the mouse ear where real time flow video was taken at 30 fps. Scale bar represents 50 μm. Recently, Helen R. Salinas et al ., has evaluated the optical properties from a colorful class of pigments and dyes that humans routinely encounter [ 1 ]. These selective dyes and pigments are approved by Food and Drug Administration  (FDA) which have utilized for the coloring of foods, drugs, and cosmetics. The authors hav

Twisted Multilayer MoS2 Growth on SrTiO3 for 2D materials

Monolayer two dimensional (2D) transition metal dichalcogenides (TMDs) are recent emerged one among all other optoelectronic material, because of its strong light−matter interactions for direct bandgap. However, these multilayer counter parts exhibited an indirect bandgap resulting to poor quantum yield of photon emission.  Sinu Mathew and his collaborators have been reported on the strong direct bandgap-like photoluminescence (PL) at ∼1.9 eV, a multilayer MoS 2 grown on SrTiO 3 in ACS Nano on November 2020. They found that the intensity  is significantly higher than the observed multilayer MoS 2 /SiO 2 . However, it affects the evolution of band structure in multilayer MoS 2 which causes the higher photo carrier recombination for the direct bandgap. To enable multilayer TMDs for robust optical device applications, these results will provide a suitable platform. In this research, they have demonstrated a strong direct bandgap-like PL emission via  chemical vapor deposition (CVD) gro

Modern Discussions on Air Pollution in Megacities

Nowadays, it can be seen very rare news on discussion about air pollution. Very high levels of air pollution have been observed in many major cities across both developed and developing economies of the world cities with varying degrees of regularity. In particular, the chemistry aspects has a major responsibility to play both of informing the development of cost-effective mitigation strategies and understanding the causes of high air pollutant concentrations. The chemical reactions of air pollutants can transform from one to another (secondary pollutants), which have a main parameter on measured levels and the influence of emerging emission sources and changing climate on air quality and health. We should understand the relative contributions of local emissions and the pollutants transported to the city from more distant sources. Figure 1. Evolution of megacities, showing percentage urban and urban agglomeration by size (adapted from the UN World Urbanization Prospect, 2018 revisio

Dimensionality of Sunlight Resources with Scientific Approach

Our nature has given a wonderful personality is ‘Sun’. We all are utilizing the Sun for our different purposes in life span. A traditional pattern of scheduled work time based on day light (is the Sun arises). Now the recent research trend is using this light source with various wavelengths such as ultraviolet rays, visible rays, and infrared rays. An artificial light is also helpful to the photosynthetic reactions. Hence, our human community is at the primary stage of using these natural resources, specifically in sun energy and searching for a suitable alternative resource.  Figure 1. Different dimensional of Sunlight Resources. Credited to SNB team. Indian Traditional festival and yoga with scientific sun affairs   Suriya pongal festival :   In Indian culture, suriya pongal ( தைப்பொà®™்கல் ) festival is one of the most important one among all other festivals celebrated by Tamilians. “Name festival is Pongal", which it means "to boil, overflow" and also refers to the tr

Different Climate Changes by Anthropogenic Aerosols

Commonly anthropogenic aerosols believed to cool the atmosphere; in this interest, they balance the global warming resulting from greenhouse gases to some extent. The phenomenon of global warming is increasing average air temperatures near the surface of Earth over the past one to two centuries. Since the mid-20 th century, many climate scientists are focusing on detailed observations of various weather phenomena such as temperatures, precipitation, storms and related influences on climate such as ocean currents and the atmosphere’s chemical composition. Frequently Earth’s climate has changed due to the influence of human activities since the beginning of the industrial revolt has been deeply rushed into the very fabric of climate change. In this case, the anthropogenic aerosols role is important for cool the atmosphere, suppose reduce the anthropogenic aerosols to increase global warming under future CO 2 concentration. Figure 1. Climate change of earth surface as clean to a warmin

Ecofriendly Epoxidation of Olefins Using Supported Au NPs Catalyst

Epoxides are highly used as the intermediates for the production of pharmaceuticals, drug intermediates, food additives, perfumes, agrochemicals and polymers. It is very imperative to develop a greener and a sustainable reaction protocols on the continuing demand of the epoxides. Propylene oxide (PO) is widely used for the production of propylene glycols and polyurethane. It is found to be one of the most significant members of epoxide family and its total production has been reached nearly about 10 million tons per annum [ 1, 2 ]. Hydrogen peroxide (H 2 O 2 ) based process was industrialized in 2008, for the commercial production of PO through EVONIK and it is selectively produced PO with H 2 O as the only by-product [ 3 ]. But, it can be seen that, H 2 O 2 is found to be comparatively expensive and gets decomposition quickly during the chemical reaction and also it is very difficult for the transportation and the search for an improved process are continued. Various transition of

High Density Flexible Supercapacitors Using Polymer Gel Electrolytes

Flexible electronics have found a wide variety of novel applications such as flexible displays, flexible solar cells, flexible circuits, electronic papers, and touch screens. Recently, it can be seen that several studies have conducted to explore high density flexible energy storage devices for their potential applications in flexible electronics such as electronic displays, mobile phones, smart bands, health bands, laptops, and computers [ 1 ]. Heteroatom-doped graphene electrodes have found to be one of a promising candidates for high density flexible energy storage applications due to its dual nature of pseudo capacitance and electrochemical double-layer capacitance. Moreover, the low energy density supercapacitors limits its potential usage and the attempts are still in progress to overcome this problem. To augment for the high energy density of the supercapacitor device, the redox-additive electrolytes are believed to be one of the elite tactics. Here, they have reported on sodium