02326nas a2200313   4500008004100000022001400041245011700055210006900172260000800241300001200249490000600261520128000267653002301547653001701570653001701587653002401604653002201628653002801650100001601678700003401694700001501728700001801743700001801761700002401779700002401803700003101827700002701858856012701885       2020                        eng d  a2365-709X00aUltrahigh sensitive carbon-based conducting rubbers for flexible and wearable human-machine intelligence sensing0 aUltrahigh sensitive carbonbased conducting rubbers for flexible   cDEC  a20006900 v53 a<p>The wearable strain sensors with multifunctional applications can fuel the rapid development of human-machine intelligence for various sectors like healthcare, soft robotics, and Internet of Things applications. However, achieving the low-cost and mass production of wearable sensors with ultra-high performance remains challenging. Herein, a simple, cost-effective, and scalable methodology to fabricate the flexible and highly sensitive strain sensors using carbon black and latex rubbers (LR) is presented. The LR-based strain sensor demonstrates excellent flexibility, fast response (approximate to 600 ms), ultra-high sensitivity (maximum gauge factor of 1.2 x 10(4) at 250% strain), and long-term stability over 1000 cycles. The LR-based strain sensors are sensitive to monitor subtle human motions such as heart pulse rate and voice recognition along with high-strain human joint operations. Additionally, the sensing mechanism of LR bands is investigated by surface topographies and electromechanical response under various strained/unstrained conditions. Further, a smart glove-based sensor module made of LR strain bands with an Arduino reader for the human-machine intelligence device for non-verbal communication in military applications is demonstrated.</p>
10aconducting rubbers10agauge factor10ahuman&\#821110amachine interfacing10avoice recognition10awearable strain sensors1 aAjeev, Arya1 aJavaregowda, Bharathkumar, H.1 aAli, Ashik1 aModak, Mrudul1 aPatil, Shreya1 aKhatua, Saumyakanta1 aRamadoss, Marimuthu1 aKothavade, Premkumar, Anil1 aArulraj, Arul, Kashmir  uhttps://library.ncl.res.in/content/ultrahigh-sensitive-carbon-based-conducting-rubbers-flexible-and-wearable-human-machine02552nas a2200241   4500008004100000022001400041245014000055210006900195260000800264300001400272490000700286520167300293100001901966700003101985700002302016700001702039700002302056700002002079700002802099700003102127700003002158856012202188       2023                        eng d  a2051-634700a3D-printed polymer composite devices based on a ferroelectric chiral ammonium salt for high-performance piezoelectric energy harvesting0 a3Dprinted polymer composite devices based on a ferroelectric chi  cJUL  a3153-31610 v103 a<p>
	Three-dimensional printing (3DP) is an emerging technology to fabricate complex architectures, necessary to realize state-of-the-art flexible and wearable electronic devices. In this regard, top-performing devices containing organic ferro- and piezoelectric compounds are desired to circumvent significant shortcomings of conventional piezoceramics, e.g. toxicity and high-temperature device processibility. Herein, we report on a 3D-printed composite of a chiral ferroelectric organic salt {[Me3CCH(Me)NH3][BF4]} (1) with a biodegradable polycaprolactone (PCL) polymer that serves as a highly efficient piezoelectric nanogenerator (PENG). The ferroelectric property of 1 originates from its polar tetragonal space group P4(2), verified by P-E loop measurements. The ferroelectric domain characteristics of 1 were further probed by piezoresponse force microscopy (PFM), which gave characteristic `butterfly' and hysteresis loops. The PFM amplitude vs. drive voltage measurements gave a relatively high magnitude of the converse piezoelectric coefficient for 1. PCL polymer composites with various weight percentages (wt%) of 1 were prepared and subjected to piezoelectric energy harvesting tests, which gave a maximum open-circuit voltage of 36.2 V and a power density of 48.1 mu W cm(-2) for the 10 wt% 1-PCL champion device. Furthermore, a gyroid-shaped 3D-printed 10 wt% 1-PCL composite was fabricated to test its practical utility, which gave an excellent output voltage of 41 V and a power density of 56.8 mu W cm(-2). These studies promise the potential of simple organic compounds for building PENG devices using advanced manufacturing technologies.</p>
1 aSahoo, Supriya1 aKothavade, Premkumar, Anil1 aNaphade, Dipti, R.1 aTorris, Arun1 aPraveenkumar, Balu1 aZareba, Jan, K.1 aAnthopoulos, Thomas, D.1 aShanmuganathan, Kadhiravan1 aBoomishankar, Ramamoorthy  uhttps://library.ncl.res.in/content/3d-printed-polymer-composite-devices-based-ferroelectric-chiral-ammonium-salt-high02309nas a2200313   4500008004100000022001400041245009600055210006900151260000800220300001400228490000700242520130500249653001601554653001401570653001701584653001801601653002201619653001401641100003101655700002001686700002601706700001701732700002301749700001901772700002001791700002901811700003101840856012401871       2023                        eng d  a0032-388800aLuminescent 3D printed poly(lactic acid) nanocomposites with enhanced mechanical properties0 aLuminescent 3D printed polylactic acid nanocomposites with enhan  cJUL  a2059-20720 v633 a<p>
	The three-dimensional (3D) printing of functional composite materials has gained tremendous interest in recent years. Nevertheless, research on 3D printing of luminescent composite materials is very limited, and the mechanical properties of such 3D-printed composites are poor. Herein, we report the preparation and characterization of a poly(lactic acid) (PLA) composite that, when 3D printed, exhibits enhanced toughness and high solid-state fluorescence quantum yield. Incorporation of only 1 wt% pyrene butyric acid modified cellulose nanofibers (PBA-m-CNF) and l0 wt% thermoplastic polyurethane (TPU) into PLA led to 223% increase in toughness and 21% increase in tensile modulus of PLA. Scanning electron microscopy (SEM) and X-ray microcomputed tomography (mu-CT) analysis of the fractured cross-sections of 3D printed composites revealed a ductile failure mode. The PLA/PBA-m-CNF1/TPU10 3D printed composite also exhibited a high solid-state fluorescence quantum yield of 38.35%. To the best of our knowledge, this is the first report to show both enhanced mechanical properties and high solid-state fluorescence emission for 3D printable PLA. Such functional PLA composites could have potential applications in the fabrication of complex-shaped sensors, optical light pipes, etc.</p>
10a3D printing10aComposite10afluorescence10aNanocellulose10apoly(lactic acid)10atoughness1 aKothavade, Premkumar, Anil1 aYadav, Prashant1 aNidhankar, Aakash, D.1 aTorris, Arun1 aPol, Harshawardhan1 aKafi, Abdullah1 aBateman, Stuart1 aSukumaran, Santosh, Babu1 aShanmuganathan, Kadhiravan  uhttps://library.ncl.res.in/content/luminescent-3d-printed-polylactic-acid-nanocomposites-enhanced-mechanical-properties