Mona Mittal

Galgotias College of Engineering and Technology (GCET)

Numerous technological advancements have been developed to tackle the issue of wastewater remediation effectively. However, the practical application of these technologies on a large scale has faced several challenges that have hindered their progress. These challenges include low selectivity, high energy requirements, and significant expenses. Nan...

Essential for human development, water is increasingly polluted by diverse anthropogenic activities, containing contaminants like organic dyes, acids, antibiotics, inorganic salts, and heavy metals. Conventional methods fall short, prompting the exploration of advanced, cost-effective remediation. Recent research focuses on sustainable adsorption,...

All-inorganic and organic-inorganic hybrid perovskite solar cells (PSCs) have taken a quantum leap owing to their high performance and low-cost solution processability. Their efficiency has been dramatically increased up to ∼26%, matching the conventional inorganic photovoltaics like monocrystalline Si (26.1%), polycrystalline Si (21.6%), CdTe (22....

In the present work, we report the fabrication and characterization of well-defined core-satellite nanostructures. These nanostructures comprise block copolymer (BCP) micelles, containing a single gold nanoparticle (AuNP) in the core and multiple photoluminescent cadmium selenide (CdSe) quantum dots (QDs) attached to the micelle's coronal chains. T...

Nanomaterials by virtue of their small size and enhanced surface area, present unique physicochemical properties that enjoy widespread applications in bioengineering, biomedicine, biotechnology, disease diagnosis, and therapy. In recent years, graphene and their derivative have attracted a great deal of attention in various applications, including...

Clean water is one of the vital resources of every living being residing on this earth. However, rapid industrialization, growing human population, urbanization, global warming, extensive agricultural practices, and climatic change have deprived them of access to clean water. These factors convert clean water into wastewater by polluting water and...

Semiconductor nanoheterostructures (NHSs) are being increasingly used for the photocatalytic conversion of solar energy in which photo-induced charge separation is an essential step and hence it is necessary to understand the effect of various factors such as size, shape, and composition on the charge transfer dynamics. Ultrafast transient absorpti...

Impressive optical properties of organic-inorganic lead halide perovskite crystals make them suitable for optoelectronic devices. However, these crystals are unstable in water and other polar solvents and quickly lose their fluorescence which cannot be recovered by the addition of non-polar solvents. Fluorescence recovery is absolute necessity for...

In the present work, we have studied the influence of gold nanoparticles (AuNPs) on the photoluminescence (PL) behavior of cadmium selenide (CdSe) quantum dots (QDs) confined in spatially separated soft nanoscale cylindrical domains. These cylindrical domains, in the form of hairy core‐shell nanofibers, were fabricated via cooperative self‐assembly...

Chemical sensors are defined as devices or instruments that transduce different types of chemical information such as concentration, chemical activity, and presence of metal ions or gases into a measurable and distinguishable signal. Semiconductor nanomaterials, especially one-dimensional (1D) nanomaterials like nanorods, nanoneedles, nanobelts, an...

Mixed-dimensional van der Waals nanohybrids (MvNHs) of two-dimensional transition metal dichalcogenides (TMDs) and zero-dimensional perovskite are highly promising candidates for high performance photonic device applications. However, the growth of perovskite over the surface of TMDs has been a challenging task due to the distinguishable surface ch...

In the present study, we demonstrate the fabrication of multifunctional nanofibers, loaded with CdSe quantum dots (QDs) and sulforhodamine 101 (S101) dye, via self-assembly process of a polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymer (BCP). The CdSe QDs and S101 dyes were simultaneously incorporated in the cylindrical domains, c...

Objectives The aim of this study was: (i) to formulate pit and fissure sealants (PFS) containing nano-hydroxyapatite (nHAP) filler; nHAP filler and silica co-filler; nHAP and nano-Amorphous Calcium Phosphate (nACP) co-filler, (ii) to evaluate physical properties; degree of conversion (DOC), curing depth (CD) and mechanical properties; microshear bo...

The understanding of the interaction between the semiconductor nanocrystals (NCs) and the proteins are essential for design and fabrication of nanocomposites for application in the field of biotechnology. Herein, we have studied the interaction between CdTe NCs and the proteins by steady-state and time-resolved photoluminescence (PL) spectroscopy....

One of the recent developments in enhancing the performance of quantum dot sensitized solar cells (QDSSCs) is to combine QDs with dyes in order to overcome the drawbacks of QDSSCs. However, implementation of this requires a detailed investigation of the interaction between QDs and dye. Here, we have studied the effect of size and surface ligands in...

For the first time, we have synthesized APbBr3 (A = Cs(+)/MA(+)/FA(+), where MA(+) = CH3NH3(+) and FA(+) = CH(NH2)2(+)) bulk as well as nanoparticles (NPs) by solid-state reactions at room temperature. This facile strategy yields different shape structures e.g. square and rectangular (CsPbBr3), spherical (MAPbBr3) and parallelogram (FAPbBr3) NPs.

Changing the capping ligands of CdS nanocrystals during their synthesis controls the optical properties of these nanocrystals. Addition of a little amount of CdCl2:Phosphonic Acid (PA) completely eliminates the surface state emission with an increase in quantum yield of band edge emission from these nanocrystals. The role of halide ions in surface...

A few approaches have been employed to tune the band gap of colloidal organic-inorganic trihalide perovskites (OTPs) nanocrystals by changing the halide anion. However, to date there is no report of electronic structure tuning of perovskite NCs upon changing the organic cation. We report here, for the first time, the room temperature colloidal synt...

Digestive ripening of polydispersed colloidal CdTe nanocrystals is performed which results in monodispersed nanocrystals (NCs) as studied by optical spectroscopy. Optimization of ligand and refluxing time is carried out. Monodispersed NCs are obtained using mercaptopropionic acid (MPA) as a digestive ripening agent at a refluxing time of 1-2 h. Dig...

A low strength alternating current (AC) electric field applied across a drying aqueous CdTe nanoparticle suspension above 100 μm gap interdigitated electrodes (IDEs) allows rapid assembly of quantum dots into photoconductive microwires. The fabrication procedure is scalable for commercial photoelectronic applications as it does not require organic...

Core/intermediate/shell (C/I/S) structures with Type-I emission are well-known and are gaining immense importance due to their superior luminescence properties. Here, we report a unique C/I/S structure composed of CdSe/CdS/ZnSe that exhibits both Type-I and Type-II phenomena. The structures have been well characterized using a combination of optica...