Human PIP blocking peptide

In this Letter, a novel, to the best of our knowledge, parallel inclined planes long period fiber grating (PIP-LPFG) for strain measurement is proposed. This structure is fabricated by a high frequency CO2 laser, which has polished periodic parallel inclined planes on a single mode fiber (SMF). Refractive index modulation (RIM) over a large area on the surface of the SMF significantly shortens the total length of the grating, and the structure of parallel inclined planes efficiently enhance the strain sensitivity of PIP-LPFG. Experimental results show that this LPFG with a miniature length of 3.9 mm has a good repeatability and stability of strain response, which can reach to 116 pm/ pte in the dynamic range of 0-425 mu epsilon. Meanwhile, the temperature sensitivity of PIP-LPFG is 54.7 pm/degrees C in the dynamic range of 30-170 degrees C. (C) 2020 Optical Society of America

The construction of photothermal materials with ideal salt tolerance has been a major subject for efficient solar desalination. Herein, a novel photothermal material based on porous ionic polymers (PIPs) nanowires is synthesized by Sonogashira-Hagihara cross-coupling reaction using ionic salt and alkynylbenzene as building blocks. The PIPs nanowires monolith shows abundant porosity with low density, leading a superior thermal insulation. The intrinsic superhydrophilicity of PIPs nanowires endows it with desired water transportation ability. By facile spraying Chinese carbon-ink on the PIPs nanowires monolith, its light absorption can be enhanced to be 90%. Based on these merits, the PIPs nanowires based photothermal materials show high solar energy conversion efficiency (81% under 1 sun irradiation). More interestingly, its inherently ionic framework can result in an ion-ion interaction between the external ions in water and ionic groups in PIPs framework, thus leading to excellent desalination ability by combing its unique superhydrophilicity, for example, no salt accumulation is observed after 6 h duration at 1 sun irradiation. Compared with the existing salt-resistant photothermal materials, the method takes the advantage of the intrinsically ionic feature of PIPs without using any artificial process, thus may open a new way for design and fabrication of high-performance salt-rejection photothermal materials.