Entropy-driven self-assembly of chiral nematic liquid crystalline phases of AgNR@Cu2O hyper branched coaxial nanorods and thickness-dependent handedness transition

Self‐Assembly of Chiral Nematic Liquid Crystalline Phases of AgNR@SiO2@Cysteine@CsPbBr3 Hybrid Nanorods with Plasmon‐Dependent Photoluminescence

“…[ 39 ] Furthermore, the nematic liquid crystal phase can be transformed into chiral nematic liquid crystal phase by using AgNRs with bent‐shape morphology and the chirality of liquid crystalline phase of AgNR@Cu 2 O HNRs can be tuned from left‐handedness to right‐handedness by increasing the Cu 2 O thickness. [ 27 ] Therefore, we suggest that the CD signals in the region from 350 to 550 nm should be assigned to the chiral nematic crystalline arrangement of the AgNR@SiO 2 @cys@CsPbBr 3 HNRs, plasmonic resonance of AgNRs (350–450 nm), and the exciton adsorption edge of the perovskite (500–550 nm). To further verify it, the phase behavior of AgNR@SiO 2 @cys@CsPbBr 3 HNR dispersion was monitored by drop‐casting the mixture into a liquid crystal cell to observe the evaporation process by polarizing optical microscope (POM).…”

“…The periodic film structures exhibit a positive circular dichroism (CD) signal owing to preferential reflection of the left‐handed CPL. [ 26 ] Besides the CNCs, the AgNRs can also form CNLCPs, [ 27 ] which exhibit strong chiroptical response due to their relatively large size and strong coupling with an external light field. The mechanism for generating CNLCP for AgNRs can be attributed to the gain of translational entropy compensating for the loss of orientational entropy and their bent shape.…”

Smart paper transformer: new insight for enhanced catalytic efficiency and reusability of noble metal nanocatalysts

“…Nanomaterials have attracted increased attention in multiple disciplines due to their unique size and shape effects. [1][2][3][4] As an important member of nanomaterials, noble metal nanocatalysts (Au nanoclusters, Pd nanoparticles, Pt nanoparticles, etc.) have widespread applications in many elds, such as environmental catalysis, [5][6][7] photothermal therapy, [8][9][10] carbon-carbon coupling reactions, [11][12][13] etc.…”

In Situ Synthesis of Ag@Cu2O-rGO Architecture for Strong Light-Matter Interactions

“…The main reasons to use Cu 2 O as a shell structure are: (1) Cu 2 O has a narrow bandgap (2.2 eV) compared with a wide bandgap semiconductor (like ZnO) [ 24 ], in which the absorption band is located in the visible light range; (2) Cu 2 O has advantages of excellent catalytic efficiency for C–C, C–N, and C–O bonds. Ag can provide plenty of free electrons and the large energy level difference between the Ag nanoparticles and Cu 2 O facilitates the transfer of photogenerated electrons between the Cu 2 O shell and the Ag core [ 25 , 26 ]. However, the increase of carrier efficiency in a pure core-shell structure is limited, and composite materials with higher efficiencies are still required.…”