02316nas a2200253   4500008004100000022001400041245011400055210006900169260008000238300001200318490000600330520140700336653002001743653001101763653002201774653000801796653000801804100002401812700002901836700002301865700002201888700002601910856012601936       2006                        eng d  a1895-106600aSynthesis, characterization and optical properties of silver and gold nanowires embedded in mesoporous MCM-410 aSynthesis characterization and optical properties of silver and   aTIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANYbSPRINGER HEIDELBERGcJUN  a317-3280 v43 a<p>Uniform nanowires of silver and gold inside the channels of MCM-41 were prepared by controlled reduction of their respective metal salts with sodium borohydride (NaBH4). Presence of nanowires of silver and gold in MCM-41 were confirmed by high angle X-ray diffraction (XRD) data (peaks between 2 theta = 30 - 60 degrees) and transmission electron microscopy (TEM) confirmed the diameter of the nanowires. Diameter of nanowires is found to be similar to 2.8 nm which is coincident with channel diameter of MCM-41. Optical properties of these heterostructured materials Ag-MCM-41 and Au-MCM-41 reveals the presence of surface plasmon absorption peaks of silver and gold respectively, and the shift in the absorption bands are associated to agglomeration of clusters inside the channels. Room temperature photoluminescence spectra exhibits interesting optical properties as observed for direct band gap semiconductors. Non-linear optical properties (NLO) corresponding to second harmonic generation (SHG) values were also recorded for self supported films of these heterostructured materials. Enhanced optical non-linearity was found to be arising from a corresponding increase of local field near the surface plasmon resonance. Further enhancement in SHG was found with poling due to an induction of orientation order. (C) Versita Warsaw and Springer-Verlag Berlin Heidelberg. All rights reserved.</p>10aAg/Au nanowires10aMCM-4110aphotoluminescence10aSHG10aTEM1 aAdhyapak, Parag, V.1 aKarandikar, Prashant, R.1 aDadge, Jagdish, W.1 aAiyer, Rohini, C.1 aChandwadkar, Asha, J.  uhttps://library.ncl.res.in/content/synthesis-characterization-and-optical-properties-silver-and-gold-nanowires-embedded-002691nas a2200241   4500008004100000022001400041245009200055210006900147260000900216300001400225490000700239520188500246653002402131653002002155653001802175653001802193100002102211700002102232700001902253700002602272700002402298856012702322       2023                        eng d  a1530-437X00aSelf-powered wearable breath sensor cum nanogenerator using AuNR-rGO-PVDF nanocomposite0 aSelfpowered wearable breath sensor cum nanogenerator using AuNRr  cAPR   a6473-64800 v233 a<p>
	Breathing is the most important function of living being. It is well known that breath contains 90% humidity along with various gases and volatile organic compounds (VOCs). These gases are released during various metabolic activities in the body. These gases present in the breath can act as biomarkers to showcase healthiness or abnormalities in the body. Therefore, breath sensors are the need of time to detect diseases at early stages and in noninvasive way. Herein, we report, simple breath sensor using Au nanorods (AuNRs) and its nanocomposite with reduced graphene oxide (rGO) and polyvinylidene fluoride (PVDF). The nanocomposites system is designed in such a way that each component has its advantages for breath sensing. Here, AuNR being a good humidity sensitive material detects the breath efficiently. The ss phased PVDF being a very good ferroelectric material, contributes for voltage generation during sensing and enables the device to be self powered. The highly conducting rGO increases the sensitivity and voltage generation by facilitating the electron transport in the nanocomposite system. The nanocomposite was optimized with respect to PVDF, rGO and Au concentration. The as-synthesized materials were characterized by physiochemical characterization techniques such as field emission scanning electron microscopy (FESEM), X-ray diffraction analysis (XRD), UV-Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The ss phase formation of the PVDF was confirmed from the XRD peak at 20.41 degrees. SEM results revealed that AuNR have length 15-20 nm and aspect ratio similar to 3-4. Breath sensing tests were carried out for as synthesized nanocomposite material. The nanocomposite exhibited high sensitivity towards breath and generated the voltage of similar to 0.7 V within 0.8 s.</p>
10aAu nanorods (AuNRs)10abreath analyzer10abreath sensor10ananogenerator1 aBang, Amruta, D.1 aGhalawat, Monika1 aPoddar, Pankaj1 aKulkarni, Sulabha, K.1 aAdhyapak, Parag, V.  uhttps://library.ncl.res.in/content/self-powered-wearable-breath-sensor-cum-nanogenerator-using-aunr-rgo-pvdf-nanocomposite