Development of high-performance polyelectrolyte-complex-nanoparticle-based pervaporation membranes via convenient tailoring of charged groups

Ultrahigh power output and durable flexible all-polymer triboelectric nanogenerators enabled by rational surface engineering

“…4b). 36 These results were consistent with the simulation results (see the le-hand panel of Fig. 4a) and further conrmed the presence of an interaction between cPLL and PSS.…”

Acid‐Resistance and Self‐Repairing Supramolecular Nanoparticle Membranes via Hydrogen‐Bonding for Sustainable Molecules Separation

“…The surface of HCPN membrane is very smooth (root mean square (RMS) surface roughness = 2.6 nm, Figure 2a and Figure S5b, Supporting Information) due to the small size of HCPN at dried state. [10] Notably, obvious nanoparticle shapes can be observed after immersing the membrane with isopropanol/water feed solution, because of the confined swelling of HCPN, [47] in agreement with the particle size increase at swelling state in Figure 1c,d. Interestingly, the surface morphology of the swelled HCPN membrane is closely dependent on the pH of feed solution (Figure 2b): the nanoparticles seem to melt together with pH declining from 7 to 1, meanwhile, the surface roughness of HCPN membrane decreases from 7.2 to 5.8 nm.…”

“…The mechanism of the distinctively enhanced separation performance at acidic condition was investigated by the novel low‐field magnetic resonance (LFNMR) technique which is a well‐approved tool for examining the crosslinking degree (Figure S6a , Supporting Information). [ 47 , 48 ] Two peaks in the time‐domain of 0.1–30 ms can be obtained for HCPN membrane irrespective of the pH used for complexation (the shorter relaxation time means larger restriction to chain mobility): the first one is attributed to the hydrogen bond and the second one arising from noncomplexed polymer chains. Clearly, both of the two peaks shift to the shorter relaxation time, hinting the increase of hydrogen bond strength.…”

3D Interaction of Zwitterions for Highly Stable and Efficient Inorganic CsPbI3 Solar Cells

“…[6,36,37] Moreover, the peaks of the absorption bands around 1450 and 718 cm −1 increased, which represent the N + (CH 3 ) 3 stretch and CH 2 rock (long-chain band), respectively, and indicate the presence of zwitterions in each film. [38] In particular, these distinct peaks of zwitterions shifted to slightly lower wavenumbers for the CsPbI 3 film compared with the FTIR spectra of pure zwitterions (Figure S7, Supporting Information), which implies interaction between each type of zwitterion and the perovskite. [28,39] We used scanning electron microscopy (SEM) to investigate further the effect of the interaction between the zwitterions and perovskite on the CsPbI 3 film morphology.…”