Indian Institute of Technology Ropar

About: Indian Institute of Technology Ropar is a education organization based out in Ropar, India. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 1014 authors who have published 2878 publications receiving 35715 citations.

Thermofluidic Transport in Droplets under Electromagnetic Stimulus: A Comprehensive Review

Abstract: In the vast expanse and scope of fluid mechanics, thermal and species transport, droplets have carved out an important niche for themselves. These microscopic fluid entities, bounded to shape by surface tension and/or interfacial forces, play important roles in variant capacities in the physical world, biological systems as well as man-made technological applications. Thereby, understanding of droplet dynamics is an essential area in research and development. To add to the complexity of interfacial thermofluidic transport in droplets, presence of electric and/or magnetic fields yields interesting and rich physics to the problem. Additionally, such field-induced transport in droplets has found applications in several systems, ranging from macro- to microscale. Consequently, research on the physics of thermofluidic transport in the presence of electromagnetic stimulus has gained wide attention in the academic community. The present article discusses the present status of research, development and knowledge base on the topic. The physics of the problem, scope and extent of work realized by the academic community till date, potential applications and future directions have been discussed in an effort to provide a comprehensive review. The article shall be able to provide the readers a precis of the research and developmental work in the field thus far and acquaint them with an idea of the path ahead.

A highly fluorescent sensor based on hybrid nanoparticles for selective determination of furosemide in aqueous medium

Abstract: The present work depicts the development of a probe based on the organic-inorganic framework that sensitively and selectively recognized furosemide in aqueous medium. An organic receptor 1 is prepared using 1, 8-naphthalic anhydride and diethylenetriamine and the product are further reacted with 1-naphthylisothiocyanate. The receptor is processed into fluorescent organic nanoparticles (FONs); unfortunately, these FONs have not shown any promising sensor activity. The FONs are used as platform for the attachment of gold nanoparticles and the resultant hybrid nanoparticles (H1) are characterized. Hybrid nanoparticles are evaluated for their photophysical studies with fluorescence spectroscopy in aqueous medium and the studies revealed that hybrid nanoparticles selectively recognize furosemide in aqueous medium. The sensor has shown competitive binding for furosemide and no other tested drug has posed any interference in the detection of furosemide. The titrations are performed with furosemide and the lowest detection limit calculated is 551 nM.

A carbon quantum dot and rhodamine-based ratiometric fluorescent complex for the recognition of histidine in aqueous systems

Abstract: Histidine is an essential α-amino acid that plays a crucial role in tissue development and helps in the transmission of metallic ions during biological events. However, an abnormal level of histidine in the body is associated with various physiological conditions such as arthritis, liver cirrhosis, kidney diseases, and asthma. Herein, a unique ratiometric fluorescence sensing system has been developed for the recognition of histidine. The sensing system was developed using carbon quantum dots (CQDs) as an energy donor and a rhodamine 6G derivative (HS30) as an energy acceptor unit. Interestingly, upon the addition of Fe(III) into the mixture of CQDs and HS30, the phenomenon of fluorescence resonance energy transfer (FRET) was observed when excited at 350 nm. The emergence of a strong emission peak at 551 nm on the addition of Fe(III) suggested the formation of a ratiometric fluorescent complex “CQDs–Fe–HS30”. The ratiometric behavior of “CQDs–Fe–HS30” was studied by monitoring fluorescence emissions at 425 nm and 551 nm with an excitation wavelength of 350 nm. Furthermore, “CQDs–Fe–HS30” was employed for the recognition of histidine in an aqueous system. Due to the high affinity of histidine to Fe(III), the addition of histidine to an aqueous solution of “CQDs–Fe–HS30” resulted in the displacement of the Fe(III) cation from the complex, and the simultaneous quenching and enhancement of the emission peaks at 551 nm and 425 nm, respectively, was observed. The developed sensing system was successfully employed for a histidine recovery experiment in human urine samples with satisfactory results. Furthermore, the mixture of CQDs and HS30 was successfully utilized to implement an inhibit logic gate with Fe(III) and histidine as inputs and emission at 551 nm as output.