A novel tri-layer Si-based micro-cantilever thermal infrared （IR） detector with carbon nanotube （CNT） film is fabricated. It is based on tile characteristic that the composite micro-cantilever bends in response to...A novel tri-layer Si-based micro-cantilever thermal infrared （IR） detector with carbon nanotube （CNT） film is fabricated. It is based on tile characteristic that the composite micro-cantilever bends in response to incident IR thermal radiation duc to the bi-material effect. The bending of micro cantilever is piczoresistively detected. Furthermore, a new IR absorbing layer material CNTs -- enhance IR radiation absorbing characteristic, the micro-electro-mechanical system be compatible with integrated circuit technology.展开更多
In this work,semi-crystalline nanocomposite hydrogels(i.e.,PAAmA_(11)A/GO gels)were synthesized by micellar copolymerization of acrylamide and N-acryloyl-11-aminoundecanoic acid(A_(11)A)in the presence of a large amou...In this work,semi-crystalline nanocomposite hydrogels(i.e.,PAAmA_(11)A/GO gels)were synthesized by micellar copolymerization of acrylamide and N-acryloyl-11-aminoundecanoic acid(A_(11)A)in the presence of a large amount of sodium dodecyl sulfonate(SDS)micelles and GO nanosheets.The resulting hydrogels(SMHs)not only demonstrated high strength and high toughness,but also exhibited good shape memory property.Because of near-infrared(NIR)light absorbability of GO nanosheets,shape recovery and shape of PAAmA_(11)A/GO gels could be tuned by NIR irradiation.Moreover,bilayer hydrogels and trilayer hydrogels were also fabricated by the integration of shape-memorized PAAmA_(11)A/GO gel and elastic hydrophobic associated hydrogel(E-gel).Based on the NIR-responsive shape memory property and layered structure,shape deformation of bilayer hydrogels and trilayer hydrogels was rather different from the single PAAmA_(11)A/GO gel.Each kind of gel structure exhibited diverse and complex shapes via programmable NIR irradiation.More importantly,the shape morphing of NIR-SMHs-based hydrogels could mimic the hand and flower and be used as actuators.展开更多
Using Fourier transform infrared spectroscopy (FTIR), we measured water contents of quartz and feldspar for four thin sections of felsic mylonite and two thin sections of banded granitic gneiss col- lected from a duct...Using Fourier transform infrared spectroscopy (FTIR), we measured water contents of quartz and feldspar for four thin sections of felsic mylonite and two thin sections of banded granitic gneiss col- lected from a ductile shear zone of middle crust along the Red Rivers-Ailaoshan active fault. The ab- sorbance spectra and peak position suggest that water in quartz and feldspar of granitic gneiss and felsic mylonite occurs mainly as hydroxyl in crystal defect, but also contains inclusion water and grain boundary water. The water contents of minerals were calculated based on the absorbance spectra. Water content of feldspar in granitic gneiss is 0.05 wt%-0.15 wt%, and that of quartz 0.03 wt%-0.09 wt%. Water content of feldspar ribbon and quartz ribbon in felsic mylonite is 0.095 wt%-0.32 wt%, and those of fine-grained feldspar and quartz are 0.004 wt%-0.052 wt%. These data show that the water content of weakly deformed feldspar and quartz ribbons is much higher than that of strongly deformed fine-grained feldspar and quartz. This suggests that strong shear deformation leads to breakage of the structures of constitutional water, inclusion and grain boundary water in feldspar and quartz, and most of water in minerals of mylonite is released to the upper layer in the crust.展开更多
基金This work was jointly supported by the National Natural Science Foundation of China under Grant No.60276037.
文摘A novel tri-layer Si-based micro-cantilever thermal infrared （IR） detector with carbon nanotube （CNT） film is fabricated. It is based on tile characteristic that the composite micro-cantilever bends in response to incident IR thermal radiation duc to the bi-material effect. The bending of micro cantilever is piczoresistively detected. Furthermore, a new IR absorbing layer material CNTs -- enhance IR radiation absorbing characteristic, the micro-electro-mechanical system be compatible with integrated circuit technology.
基金supported by the National Natural Science Foundation of China(Grant No.21504022)the China Postdoctoral Science Foundation(Grant Nos.2018M642745 and 2020M672179)+1 种基金the Program for Innovative Research Team(in Science and Technology)in the University of Henan Province(Grant No.19IRTSTHN027)the Young Backbone Teachers Program of Henan Polytechnic University(Grant No.2017XQG-06)。
文摘In this work,semi-crystalline nanocomposite hydrogels(i.e.,PAAmA_(11)A/GO gels)were synthesized by micellar copolymerization of acrylamide and N-acryloyl-11-aminoundecanoic acid(A_(11)A)in the presence of a large amount of sodium dodecyl sulfonate(SDS)micelles and GO nanosheets.The resulting hydrogels(SMHs)not only demonstrated high strength and high toughness,but also exhibited good shape memory property.Because of near-infrared(NIR)light absorbability of GO nanosheets,shape recovery and shape of PAAmA_(11)A/GO gels could be tuned by NIR irradiation.Moreover,bilayer hydrogels and trilayer hydrogels were also fabricated by the integration of shape-memorized PAAmA_(11)A/GO gel and elastic hydrophobic associated hydrogel(E-gel).Based on the NIR-responsive shape memory property and layered structure,shape deformation of bilayer hydrogels and trilayer hydrogels was rather different from the single PAAmA_(11)A/GO gel.Each kind of gel structure exhibited diverse and complex shapes via programmable NIR irradiation.More importantly,the shape morphing of NIR-SMHs-based hydrogels could mimic the hand and flower and be used as actuators.
基金the National Basic Research Program of China (Grant No. 2004CB418405)the National Natural Science Foundation of China (Grant No. 40474067)
文摘Using Fourier transform infrared spectroscopy (FTIR), we measured water contents of quartz and feldspar for four thin sections of felsic mylonite and two thin sections of banded granitic gneiss col- lected from a ductile shear zone of middle crust along the Red Rivers-Ailaoshan active fault. The ab- sorbance spectra and peak position suggest that water in quartz and feldspar of granitic gneiss and felsic mylonite occurs mainly as hydroxyl in crystal defect, but also contains inclusion water and grain boundary water. The water contents of minerals were calculated based on the absorbance spectra. Water content of feldspar in granitic gneiss is 0.05 wt%-0.15 wt%, and that of quartz 0.03 wt%-0.09 wt%. Water content of feldspar ribbon and quartz ribbon in felsic mylonite is 0.095 wt%-0.32 wt%, and those of fine-grained feldspar and quartz are 0.004 wt%-0.052 wt%. These data show that the water content of weakly deformed feldspar and quartz ribbons is much higher than that of strongly deformed fine-grained feldspar and quartz. This suggests that strong shear deformation leads to breakage of the structures of constitutional water, inclusion and grain boundary water in feldspar and quartz, and most of water in minerals of mylonite is released to the upper layer in the crust.
