https://dspace.iiti.ac.in:8080/jspui/handle/123456789/3648 2026-05-12T17:05:07Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18040 Title: Synergizing Color Modulation with Energy Storage Capabilities through MXene Doping: Hybrid Electrochromic Supercapacitor and the Mechanism Therein Authors: Srivastava, Saumya; Sahu, Bhumika; Bansal, Love; Ahlawat, Nikita; Rath, Deb Kumar; Rout, Partha Sarathi; Kaladi Chondath, Subin; Kumar, Shivam; Singh, Sharmistha; Kumar, Rajesh Abstract: The rapid progress in fundamental technologies has sparked significant interest in multifunctional electronic gadgets with flexible and wearable capabilities, driving intense research into high-performance multifunctional devices. Here, a 2-fold approach is employed to design a multifunctional Ti3C2 MXene-doped methyl viologen (MV) and Prussian blue (PB)-based electrochromic energy storage device (Ti3C2-ECESD). First, role-specific components have been identified to achieve targeted functionality, and second, a density functional theory-based simulation in combination with experimental in situ voltage-dependent Raman measurements has been utilized to establish the working mechanism. The 2D material (Ti3C2 MXene), when used as a dopant, enhances the electrochromic properties and enables energy storage. Notably, an improved electrochromic property has also been achieved as the necessary prebleaching step was carried out in the device state configuration to avoid degradation due to side reactions in liquid solutions. The inclusion of Ti3C2 MXene in the device achieves a high color contrast of 84% with impressive coloration efficiency (506 cm2/C), durable stability over 1400 s, and a fast switching speed of ∼1.4 s. In conjunction with its improved electrochromic performance, the device exhibits good charge storage properties, characterized by fast charging and slow discharging, with a maximum specific capacitance of 33.4 mF/cm2 at a current density of 0.4 mA/cm2. To extend its on-site application, a flexible device has also been fabricated that can be easily bent or twisted, making it a promising candidate for real-life multifunctional applications in wearable electronic gadgets. © 2026 American Chemical Society 2026-01-01T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18042 Title: Multiplicity dependence of f0(980) production in pp collisions at s= 13 TeV Authors: Singh, K.; Sahu, D.; Sahoo, Raghunath; Sahoo, B.; Roy, Ankhi; Radhakrishnan, A.M.K.; Prasad, S.; Pradhan, K.K. Abstract: The dependence of f0(980) production on the final-state charged-particle multiplicity is reported for proton–proton (pp) collisions at the centre-of-mass energy, s= 13 TeV. The production of f0(980) is measured with the ALICE detector via the f0(980)?p+p- decay channel in a midrapidity region of |y|< 0.5. The evolution of the integrated yields and mean transverse momentum of f0(980) as a function of charged-particle multiplicity measured in pp at s= 13 TeV follows the trends observed in pp at s= 5.02 TeV and in proton–lead (p–Pb) collisions at sNN= 5.02 TeV. Particle yield ratios of f0(980) to p± and K*(892)0 are found to decrease with increasing charged-particle multiplicity. These particle ratios are compared with calculations from the canonical statistical thermal model as a function of charged-particle multiplicity. The thermal model calculations provide a better description of the decreasing trend of particle ratios when no strange or antistrange quark composition for f0(980) is assumed, which suggests that the data do not support significant hidden strangeness in the f0(980). © CERN for the benefit of the ALICE Collaboration 2026. 2026-01-01T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18024 Title: Measurement of the p–Σ+ correlation function in pp collisions at s=13 TeV Authors: Bailung, Y.; Behera, D.; Goswami, K.; Gupta, R. Abstract: In this letter, the first measurement of the femtoscopic correlation of protons and Σ+ hyperons is presented and used to study the p–Σ+ interaction. The measurement is performed with the ALICE detector in high-multiplicity triggered pp collisions at s=13 TeV. The Σ+ hyperons are reconstructed using a missing-mass approach in the decay channel to p+π0 with π0→γγ, while both Σ+ and protons are identified using a machine learning approach. These techniques result in a high reconstruction efficiency and purity, which allows the measurement of the p–Σ+ correlation function for the first time. Thanks to the high significance achieved in the p–Σ+ correlation signal, it is possible to discriminate between the predictions of different models of the N–Σ interaction and to accomplish a first determination of the p–Σ+ scattering parameters. Copyright © 2026. Published by Elsevier B.V. 2026-01-01T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18029 Title: Emerging Potential of Eu2O2SO4in Reversible Oxygen Storage: A Comparative Study with Pr2O2SO4 Authors: Joshi, Prathamesh U.; Bhobe, Preeti Anand Abstract: Rare-earth oxysulfates (RE2O2SO4, where RE = lanthanides) have emerged as promising candidates for high-capacity oxygen storage, particularly in moderate- to high-temperature applications. In this study, a detailed comparative investigation was conducted on a well-studied praseodymium oxysulfate system and the relatively unexplored europium analogue. Both materials were synthesized via a precipitation method and systematically reduced to their corresponding oxysulfides (RE2O2S) using H2/N2 flow. Redox and structural behaviors were systematically analyzed by using temperature-programmed reduction (TPR), thermogravimetric oxidation, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray absorption near-edge spectroscopy (XANES). Both systems exhibit a reversible monoclinic to hexagonal phase transformation during redox cycling, along with exceptionally high oxygen storage capacities. Eu2O2SO4 demonstrated a marginally earlier reduction onset compared to Pr2O2SO4, attributed to its distorted oxysulfate lattice observed in Raman spectra and its surface multivalence (Eu3+/Eu2+) as revealed by XPS. The presence of a dominant oxygen vacancy peak in the O 1s XPS spectrum of Eu2O2S suggests an enhanced surface defect concentration, correlating with faster reoxidation behavior. This comprehensive study elucidates the redox mechanisms in rare-earth oxysulfates and positions Eu2O2SO4 as a promising yet underexplored oxygen storage material. The findings pave the way for future optimization strategies to further optimize these materials for versatile redox and oxygen storage applications across a wide temperature range. © 2026 American Chemical Society 2026-01-01T00:00:00Z