HCl/CSA doped POT-Mn3O4 nanocomposites based conformable thin film temperature sensor for prosthetic hand gloves

Abstract

Flexible and conformable Hydrochloric acid/ Camphor sulphonic acid doped thin film of poly-o-toluidine-Mn 3 O 4 nanocomposites has been fabricated on fire retardant glass cloth substrate. These films were found to have RT-NTC characteristics in the temperature range of 30-185°C. The thermistor cut off has been found in the temperature range of 140-185 ± 5°C depending upon the type of dopant. The material has been characterized using FT-IR, XRD, TEM for structure and morphology and TGA/DTA/DTG for thermal stability. Thermistor constant (b) obtained from RT characteristics are in the range of 6,210-8,080 K and 6,736-8,824 K for HCl doped and CSA doped thin films respectively. The activation energies (DE) are obtained in the range 0.535-0.697 eV for HCl doped and 0.580-0.760 eV for CSA doped thin films. Further the linearization of thin film based NTC thermistors was carried out by using low cost analog circuit. The same can be evaluated for point and surface temperature sensing in gloves for prosthetic hands.

Morphology Reshaping Enabling Self‐Densification of Manganese Oxide Hybrid Materials for High‐Density Lithium Storage Anodes

“…The initial formation of ultrasmall nanocrystals and their further coarsening result from the in situ protection of the uniform organic encapsulation layer and finally its gradual disappearance due to oxidation and thermal decomposition, which is substantiated by the controllable evolution of the COO, COC, CH, COH, and acetylenic carbon organic functional groups peaks in the Fourier transform infrared (FT‐IR) spectra with the reaction duration (Figure S2, Supporting Information) . The evolution of Mn 3 O 4 and Mn‐COP is also revealed by the change in the Mn‐O vibration absorbance bands in the FT‐IR spectra at approximately 400–750 cm −1 (425, 487, and 610 cm −1 ascribed to Mn 3 O 4 and 561 and 657 cm −1 ascribed to Mn‐COP), which is well consistent with the XRD results . Taking Mn 3 O 4 @OFG‐10m as an example, the uniform organic encapsulation layer is also verified by the corresponding energy dispersive X‐ray spectrum and electron energy loss spectroscopy elemental mapping images (Figures S3 and S4, Supporting Information).…”

“…[30] The evolution of Mn 3 O 4 and Mn-COP is also revealed by the change in the Mn-O vibration absorbance bands in the FT-IR spectra at approximately 400-750 cm −1 (425, 487, and 610 cm −1 ascribed to Mn 3 O 4 and 561 and 657 cm −1 ascribed to Mn-COP), which is well consistent with the XRD results. [28,31,32] Taking Mn 3 O 4 @OFG-10m as an example, the uniform organic encapsulation layer is also verified by the corresponding energy dispersive X-ray spectrum and electron energy loss spectroscopy elemental mapping images (Figures S3 and S4, Supporting Information). The Mn 3 O 4 content is 51.45% (wt%) according to the thermogravimetric (TG) curves and the confirmed phase of the residue after the TG test of pure Mn 2 O 3 (Figure S5, Supporting Information), consistent with previous results.…”

Tunable Thermal-Response Shape Memory Bio-Polymer Hydrogels as Body Motion Sensors

“…During the past decade, flexible electronic devices have earned great achievements and attracted much interests, [1][2][3][4][5][6][7] especially the stretching sensor which has been greatly developed in wearable electronics devices, [8][9][10][11][12][13][14] flexible luminescence devices [15][16][17][18] and soft robotics. [19][20][21][22][23][24][25] Among different kinds of stretching sensor, ionic conductive hydrogel stretching sensor is considered to be the best materials for the human body motion sensor, due to the good electrochemical performance [26][27][28][29][30][31][32][33][34] and controllable mechanical properties. [35][36][37] Many studies have been focused on the hydrogel stretching sensors.…”