02455nas a2200241   4500008004100000022001400041245012100055210006900176260000800245300001400253490000700267520164400274100001901918700001801937700001701955700001601972700001701988700001902005700001702024700002002041700002102061856013102082       2025                        eng d  a2040-336400aInvestigating the visible range photoresponse of an organic single-crystal analogue of the green fluorescent protein0 aInvestigating the visible range photoresponse of an organic sing  cAPR  a8614-86230 v173 a<p>
	The growing demand for lightweight, flexible, semi-transparent and low-cost photodetectors (PDs) in wearable electronics and optical communication systems has prompted studies to investigate organic materials as feasible alternatives to conventional inorganic PDs. However, modern organic PDs often face responsivity, detectivity, and photoresponse speed limitations, particularly in the visible range. Here, we present the photoresponse of an organic single-crystal analogue of the green fluorescent protein (GFP) chromophore photodetector, fabricated on a silicon nitride substrate. A significant increase in photocurrent was detected upon illumination with visible wavelengths (532 nm, 630 nm, and halogen light). A remarkably consistent and repeatable photoresponse was obtained during the ON and OFF illumination cycles. The device showed the dependence of photocurrent on the applied bias voltages. The measured photocurrent, responsivity, detectivity, rise time, decay time, noise equivalent power and external quantum efficiency are studied for different wavelengths. Strikingly, the fabricated device demonstrates excellent performance in the visible region compared to several conventional organic and inorganic PDs. The observed responsivity and detectivity values for the device are 98 mA W-1 and 7.94 x 108 Jones, respectively. Furthermore, the device also exhibits rapid photoresponse dynamics with a rise time of 180 ms and a decay time of 152 ms. The excellent photodetection features indicate that the single crystal GFP could serve as a versatile broadband material for future applications in optoelectronics.</p>
1 aVirole, Vishal1 aDabke, Niteen1 aVerma, Sahil1 aKumar, Ajay1 aPandya, Rinu1 aHusale, Sudhir1 aVanka, Kumar1 aGonnade, Rajesh1 aKanawade, Rajesh  uhttps://library.ncl.res.in/content/investigating-visible-range-photoresponse-organic-single-crystal-analogue-green-fluorescent02271nas a2200361   4500008004100000022001400041245016600055210006900221260000800290300001100298490000800309520108600317653000801403653002601411653002001437653002701457653003201484653002301516100001801539700001601557700001601573700001901589700002201608700002301630700001801653700001901671700001601690700001901706700001601725700001901741700002101760856012801781       2025                        eng d  a0360-319900aOptimisation of metallic bismuth nanoparticle supported Pt-Bi(x%)/C hybrid electrocatalyst for cost effective and efficient hydrogen production in alkaline media0 aOptimisation of metallic bismuth nanoparticle supported PtBixC h  cAUG  a1506990 v1613 a<p>
	The present study employed a simple mechanochemical method followed by 24-h ultrasonication to synthesize oxide-free metallic bismuth (Bi) nanoparticles. This was further used to synthesize a Pt-Bi(x%)/C (NC-x) hybrid electrocatalyst for the hydrogen evolution reaction in alkaline media. X-ray photoelectron spectroscopy and contact angle measurements reveal, Bi modifies the electronic structure and surface morphology of the Pt/C electrocatalyst, thus enhancing reaction kinetics and active site availability. The relative three-electrode study reveals that optimised NC-20 electrocatalyst reduces the overpotentials by 10.44 % and enhances the current density by 53 % compared to commercial Pt/C. The practical applicability of the NC-20 electrocatalyst was studied with the 13 cm2 single cell anion exchange membrane electrolyser. The catalyst demonstrates promising performance where the current density of NC-20//IrO2 relatively increases by 22.6 % compared to standard Pt/ C//IrO2, and shows continuous production and stable performance when monitored for 30 h.</p>
10aAEM10aBismuth nanoparticles10aelectrocatalyst10aFull cell electrolysis10ahydrogen evolution reaction10awater electrolysis1 aDokhe, Revati1 aUgale, Atul1 aDube, Onkar1 aVarpe, Vaibhav1 aGalave, Chaitanya1 aHattale, Gangadhar1 aKadam, Rutuja1 aVirole, Vishal1 aKumar, Ajay1 aHusale, Sudhir1 aNatu, Varun1 aShevate, Rahul1 aKanawade, Rajesh  uhttps://library.ncl.res.in/content/optimisation-metallic-bismuth-nanoparticle-supported-pt-bixc-hybrid-electrocatalyst-cost02882nas a2200289   4500008004100000022001400041245015800055210006900213260000800282300001100290490000800301520188200309653002402191653003702215653001802252653002202270653001802292653002302310100001602333700001902349700002002368700002102388700001702409700001902426700002102445856012602466       2025                        eng d  a0030-399200aReal-time estimation of blood oxygenation parameters from human foot sole during leg elevation: a preliminary study with diffuse reflectance spectroscopy0 aRealtime estimation of blood oxygenation parameters from human f  cFEB  a1117060 v1813 a<p>
	This study investigated the applicability of diffuse reflectance spectroscopy (DRS) for real-time and non-invasive measurement of blood oxygenation parameters (BOPs) such as reduced hemoglobin (RHb), oxyhemoglobin (HbO(2)), and oxygen saturation (SO2) from human foot sole during leg elevation. Seventeen (17) healthy male subjects aged between 21 to 39 years were included in this study. Diffuse reflectance spectra were recorded from measurement sites namely the 5th metatarsal, ball of great joint, calcaneum, and great toe of the human foot sole w.r.t. leg elevation angles such as 0(0), 15(0), 30(0), 45(0), and 60(0), respectively. The localized BOPs were derived from the recorded spectra. In addition, blood hemodynamic parameters (BHPs) such as heart rate (HR), SO2, perfusion index (PI), systolic blood pressure (SBP), and diastolic blood pressure (DBP) were also measured for each elevating angle. To study and assess the changes in BOPs and BHPs w.r.t. leg elevation, a One-way ANOVA test followed by a Tukey HSD post-hoc test was performed. We observed a statistically significant increase in RHb (p &lt; 0.001) and a decrease in HbO(2) (p &lt; 0.001) after 45 degrees of leg elevation, however, there was no statistically significant difference in SO2 (p = 0.74) and HR (p = 0.84) for each measurement site w.r.t. leg elevation, respectively. Furthermore, PI (p &lt; 0.01), ankle SBP (p &lt; 0.001) and DBP (p &lt; 0.001) were decreased w.r.t. leg elevation. The obtained results are in agreement with the literature. The preliminary results suggest that DRS has the potential for real-time estimation of BOPs from the local sites of healthy human foot soles during leg elevation. Thus, it opens the possibility of DRS to monitor and evaluate the diagnosis and treatment of ischemia and edema during leg elevation of patients through BOPs measurement.</p>
10adiabetic foot ulcer10adiffuse reflectance spectroscopy10aLeg elevation10aOxygen saturation10aOxyhemoglobin10aReduced hemoglobin1 aKumar, Ajay1 aLohchab, Viney1 aPawar, Dnyandeo1 aSomeshwar, Vimal1 aMathe, Vikas1 aHusale, Sudhir1 aKanawade, Rajesh  uhttps://library.ncl.res.in/content/real-time-estimation-blood-oxygenation-parameters-human-foot-sole-during-leg-elevation