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[Display omitted] • In-situ one-pot hydrothermal-synthesis of MoTe 2 @C NDs was detailed. • MoTe 2 @C NDs' potency in biosensing was explored. • MoTe 2 @C NDs were characterized by using XPS, Raman spectroscopy, XRD and TEM. • Upon gradual-proliferation of H 2 O 2 , MoTe 2 @C NDs sensed H 2 O 2 significantly (LOD = 14.22 nM). • The PL quenching-mechanism was elucidated based on three-level kinetic model considering charge separated-trap states. Transition metal dichalcogenides (TMDs) based materials have grabbed striking attention to a great extent owing to their intriguing characteristics for biological, optical, chemical and medicinal applications. Herein, we report in-situ one-pot hydrothermal-synthesis of molybdenum ditelluride@carbon nano-dots (MoTe 2 @C NDs) and then explored its potency in biosensing. The MoTe 2 @C NDs have been characterized by using X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy and Transmission Electron Microscopy (TEM) for confirmation. Furthermore, the photophysical properties of MoTe 2 @C NDs have been examined. Under radiation of Ultra-Violet (UV) light (λ = 365 nm), the MoTe 2 @C NDs emit cyan fluorescence which has been confirmed by photoluminescence (PL) spectroscopy (PL peak at ∼431 nm, excitation wavelength ∼350 nm). The as-synthesized sample has been subjugated for the sensing of hydrogen-peroxide (H 2 O 2) molecules. Notably, with a gradual proliferation of the concentration of H 2 O 2 , the PL intensity of the MoTe 2 @C NDs decreases and is found to be linear (R2 = 0.9986). The detection-limit has also been estimated as 14.22 nM. The PL quenching-mechanism has been elucidated based on three-level kinetic model considering charge separated-trap states (1[D+···A−] ↔ 3[D+···A−]). This is the first work of hydrothermal-synthesis of MoTe 2 @C NDs and study of its optical properties, which has efficient potential to use as H 2 O 2 sensor in industrial/biomedical applications. [ABSTRACT FROM AUTHOR]

• In this work we have designed high sensitivity, non-invasive and use-throw in nature type biocompatible Eu: Y 2 O 3 dispersed PVA film with gold nanorod (AEYCP film) fluorescent sensing probe for non-enzymatic detection of hydrogen peroxide (H 2 O 2) and glucose (C 6 H 12 O 6). • Eu: Y 2 O 3 complex and Au nanorods have been synthesized by an auto combustion and seed-mediated growth methods. • The as-synthesized Eu: Y 2 O 3 complex and Au nanorods have been dispersed properly in Poly Vinyl Alcohol (PVA) to form a fluorescent flexible film AEYCP and subsequently applied to facilitate for non-enzymatic detection of H 2 O 2 and C 6 H 12 O 6. • AEYCP film shows excellent fluorescence quenching in the presence of H 2 O 2 at ∼500 nM. A similar quenching phenomenon has also been observed with glucose. A low detection limit of 1.80 × 10−9 M and 1.60 × 10-6 M has been observed with H 2 O 2 and glucose, respectively. • Our result provides an insight for the synthesis of rare earth metal-doped oxide flexible non-enzyme mimicking fluorescent probe which may create a new class of detection systems for different biomedical applications. This article addresses a high sensitivity, non-invasive, and use-throw in nature type biocompatible Eu: Y 2 O 3 dispersed PVA film with gold nanorod (AEYCP film) fluorescent sensing probe for non-enzymatic detection of hydrogen peroxide (H 2 O 2) and glucose (C 6 H 12 O 6). The fluorescence spectra of the as-synthesized AEYCP fluorescent film consist of some sharp emission (most intense peak at ∼611 nm, owing to the 5D 0 -7F 2 transition) which corresponds to electrical and magnetic dipole transitions. In the presence of H 2 O 2 and glucose, the fluorescence intensity of the AEYCP film gets quenched due to the reduction of electron-hole pair, at the Eu center. The AEYCP film shows excellent fluorescence quenching in the presence of H 2 O 2 at ∼500 nM (with a low detection limit of 1.80 × 10−9 M) and glucose (with a low detection limit 1.60 × 10-6 M). Herein, we envision that our result provides an insight for the synthesis of rare earth metal-doped oxide flexible,non-enzyme mimicking fluorescent probe for different biomedical applications. [ABSTRACT FROM AUTHOR]