@article {48150,
	title = {Luminescence turn-off detection of metal ions and explosives using graphene quantum dots},
	journal = {MRS Communications},
	volume = {12},
	year = {2022},
	month = {APR},
	pages = {168-174},
	type = {Article},
	abstract = {<p>
	Green luminescent graphene quantum dots (GQDs) obtained from combustion of white printing paper were used for detection of fourteen different metal ions and six different explosives in an aqueous medium. These were obtained using a microwave-assisted synthesis process. After optimizing the experimental conditions (pH 6; quantum yield (QY) similar to 38.2\%), a sensitive sensing system was developed to detect explosives and free residual metal ions in the environment based on fluorescence quenching of GQDs. The as-synthesized GQDs, as a sensing system, is most sensitive for Cu2+ ion and 2,4-DNP with a detection limit of 0.62 mu M and 0.50 mu M, respectively.</p>
},
	issn = {2159-6859},
	doi = {10.1557/s43579-022-00157-w},
	author = {Jyotsna, Shubhra and Sadhu, Subha and Sharma, Vinay and Gupta, Preeti and Sharma, Geeta and Poddar, Pankaj}
}
@article {48461,
	title = {Investigating the ferrimagnetic behaviour of trigonal 3C Fe7S8 nanoparticles},
	journal = {Bulletin of Materials Science},
	volume = {46},
	year = {2023},
	month = {MAY},
	pages = {108},
	type = {Article},
	abstract = {<p>
	The magnetic properties of trigonal 3C Fe7S8 nanoparticles, synthesized via the thermal decomposition method, are investigated using temperature-dependent zero-field cooled (ZFC) and field-cooled (FC) magnetization (M-T) curves. The M-T data, recorded at 100 and 1000 Oe, reveal magnetic ordering with high Curie transition temperature (T-C \&gt; 300 K) in the specimen. The magnetization vs. applied magnetic field (M-H) data measured in the temperature range from 7 to 300 K show that the compound exhibits ferrimagnetic ordering. The values of coercivity (H-C), saturation magnetization (M-60 kOe) and remanent magnetization (M-R) appear to increase at lower measuring temperatures. As the result of increasing M-60 kOe at lower measuring temperatures, within the temperature range of 7 to 300 K, the maximum energy product (BHmax) has the highest value of 128 kG Oe at 7 K.</p>
},
	keywords = {anisotropy, energy product, Fe7S8, ferrimagnetism, Pyrrhotites, trigonal phase},
	issn = {0250-4707},
	doi = {10.1007/s12034-023-02943-1},
	author = {Jyotsna, Shubhra and Poddar, Pankaj}
}
