Chemically Transformed Ag2 Te Nanowires on Polyvinylidene Fluoride Membrane For Flexible Thermoelectric Applications.

Flexible thermoelectric devices of nanomaterials have shown a great potential for applications in wearable to remotely located electronics with desired shapes and geometries. Continuous powering up the low power flexible electronics is a major challenge. We are reporting a flexible thermoelectric module prepared from silver telluride (Ag2 Te) nanowires (NWs), which are chemically transformed from uniquely synthesized and scalable tellurium (Te) NWs. Conducting Ag2 Te NWs composites have shown an ultralow total thermal conductivity ~0.22 W/mK surpassing the bulk melt-grown Ag2 Te ~1.23 W/mK at ~300 K, which is attributed to the nanostructuring of the material. Flexible thermoelectric device consisting of 4 legs (n-type) of Ag2 Te NWs on polyvinylidene fluoride membrane displays a significant output voltage (Voc ) ~2.3 mV upon human touch and Voc ~18 mV at temperature gradient, ΔT ~50 K, which shows the importance of NWs based flexible thermoelectric devices to power up the low power wearable electronics.

Nanomolecularly-induced Effects at Titania/Organo-Diphosphonate Interfaces for Stable Hybrid Multilayers with Emergent Properties.

Nanoscale hybrid inorganic-organic multilayers are attractive for accessing emergent phenomena and properties through superposition of nanomolecularly-induced interface effects for diverse applications. Here, we demonstrate the effects of interfacial molecular nanolayers (MNLs) of organo-diphosphonates on the growth and stability of titania nanolayers during the synthesis of titania/MNL multilayers by sequential atomic layer deposition and single-cycle molecular layer deposition. Interfacial organo-diphosphonate MNLs result in ∼20-40% slower growth of amorphous titania nanolayers and inhibit anatase nanocrystal formation from them when compared to amorphous titania grown without MNLs. Both these effects are more pronounced in multilayers with aliphatic backbone-MNLs and likely related to impurity incorporation and incomplete reduction of the titania precursor indicated by our spectroscopic analyses. In contrast, both MNLs result in two-fold higher titania nanolayer roughness, suggesting that roughening is primarily due to MNL bonding chemistry. Such MNL-induced effects on inorganic nanolayer growth rate, roughening, and stability are germane to realizing high-interface-fraction hybrid nanolaminate multilayers.

Epidemiologic correlates of malnutrition among under-three children in the rural community of Northern India.

Context: Worldwide malnutrition is identified as a major health and nutrition problem. Undernutrition contributes to an estimated 45% of child deaths globally. The prevalence of underweight among children in India is among the highest in the world. Our children also bear a tremendous double burden of malnutrition. Aims: To find out the prevalence and determinants of malnutrition among six months to three-year-old children in the rural community of Northern India. Settings and Design: A community-based cross-sectional study conducted among children aged six months to three years in a rural area of Ludhiana district, Methods and Material: A total of 662 children in the age group of six months to three years from a population of 30,000 were identified and included in the study. All the relevant information regarding these children was collected from family folders. Socioeconomic status was assessed using the modified Udai Pareek scale (MUP). Statistical analysis used: The data collected was entered in MS Excel and was analyzed using SPSS version 26 and WHO Anthro Survey Analyzer. Results: Out of 662 children, 16% were underweight. Almost 50% of the children in the two-three years category were underweight. The prevalence of stunting in the study population was 20.7% and that of overweight was 4.8%. The prevalence of underweight was higher in children of low socioeconomic status than in children from upper socioeconomic status (P = 0.000). There was a significant association between birth order and increasing cases of underweight (P = 0.000). Conclusions: The causes of malnutrition in children are complex and involve multiple factors. There is a need for vigorous monitoring for early detection of malnutrition for children aged two-three years. The improvement of maternal education will improve the nutritional status of the child.