This article reports H-bonding driven supramolecular polymerization of naphthalimide(A)-thiophene(D)-naphthalimide(A) (ADnA, n = 1-4) conjugated ambipolar π-systems and its remarkable impact on the room temperature ferroelectricity. Electrochemical studies confirm the ambipolar...

Three supramolecular networks are synthesized by the combination of Mn(II) and flexible ligands [1,2-bis (4-pyridyl) ethane (bpe); 1,3-bis (4-pyridyl) propane (bpp); 4,4′-bipyridyl disulfide (bpds)], characterized by single-crystal X-ray analysis. All three complexes have extended solid-state structure formed by π-π interactions, and there is an excellent opportunity to elucidate the difference in the formation of extended networks in these three complexes. Complex 1, which is reported in a paper earlier by our group, is an unprecedented three-dimensional (3D) "honeycomb"-like architecture constructed from a novel sinusoidal one-dimensional (1D) chain [Mn(bpe)(H 2 O) 4 ] 2+ through π-π interactions in which bpe is used as a bidentate bridging ligand. Complex [{Mn(bpp) 3 Cl 2 }(H 2 O) 2 ] n 2 generates a "standing wave"-like architecture by π-π interactions from a neutral zigzag 1D chain of [Mn(bpp, which is selfassembled to form a two-dimensional sheet by hydrogen bonding. These sheets interact to generate 3D supramolecular structure stabilized by an interesting "sandwiched" π-interaction involving both coordinated and solvated bpds. Solid-state fluorescence results of these flexible ligands and complexes are in agreement with their structures.

Cyclotides are backbone-cyclized peptides of plant origin enriched with disulfide bonds, having exceptional stability towards thermal denaturation and proteolytic degradation. They have a plethora of activities like antibacterial, antifungal, anti-tumor...

No abstract

This communication reveals co-assembly of an electron-deficient naphthalene-diimide (NDI)-appended polyurethane (P1) and electron-rich pyrene (Py), forming an organogel with prominent room-temperature ferroelectricity. In a non-polar medium, intra-chain hydrogen-bonding among the urethane groups of P1 produces a folded structure with an array of the NDIs in the periphery, which intercalate Py by charge-transfer (CT)-interaction. Such CT-complexation enables slow crystallization of the peripheral hydrocarbons, causing gelation with nanotubular morphology, in which the wall consists of the alternating NDIÀ Py stack. Such D-A assembly exhibits ferroelectricity (saturation polarization P s � 0.8 μC cm À 2 and coercive field E c � 8 kV cm À 1 at 500 V and 10 Hz frequency) with Curie temperature (T c ) of � 350 K, which can be related to the disassembly of the CT-complex. In the absence of Py, P1 forms spherical aggregates, showing dielectric behaviour.

Phosphorene, a monolayer of elemental phosphorus, has emerged as one of the most significant two-dimensional (2D) atomic crystals in the post-graphene era, as a potential candidate for semiconductor industry, nanotechnology, optoelectronics, and nanomedicine. However, the toxicological effects of this material toward different biomolecules remain elusive. In this article, we perform all-atom molecular dynamics simulations to decipher the effect of interaction and adsorption of two dimeric proteins, namely the HIV-1 integrase and the λ 6−85 repressor protein on black phosphorene (BPn). It is revealed that upon purely noncovalent adsorption "on the top" of the BPn surface, the secondary structure of the proteins remains conserved, maintaining all the inter-and intraresidue interactions. In addition, the dimeric structure of the proteins does not dissociate into individual monomeric units, thereby inflicting insignificant to no nanotoxicity. However, if the protein−nanomaterial interaction occurs from an orientation where the edge of the 2D material is directed toward the dimer interface and the axis of dimerization of the protein is perpendicular to the plane of the material, a "clean cut" of the dimer is highly probable, wherein individual monomers are structurally not perturbed. The process of BPn edge-induced dimer cleavage is highly favorable as the Gibbs free energy change accompanying the process is negative for both of the dimeric proteins. Thus, BPn is expected to show orientation-dependent nanotoxicity toward dimeric proteins. For monomeric proteins, however, the extent of nanotoxicity would be significantly milder, and the 2D material may be used as a "molecular scissor" for the nondisruptive cleavage of dimeric proteins.

Highlights SIMS analysis confirmed the doping of Er into the In2O3 TF  I-V loop analysis gives reduced current memory window for In2O3:Er TF based device  High ideality factor was determined at low temperature and explained  Defect related photoconductivity was confirmed from low temperature measurement  10 K temporal response of the Au/In2O3:Er/Si confirmed removal of oxygen defects

2D MoS2 holds immense potential for electronic and optoelectronic applications due to its unique characteristics. However, the atomic-scale thickness of MoS2 hinders the optical absorbance, thereby limiting its photodetection capability. Vertically-aligned MoS2 (VA-MoS2) has an advantange of strong optical absorption and quick intra-layer transport, offering high speed operation. The coupling of plasmonic metal nanostructure with MoS2 can further enhance the light-matter interaction. Pt/Pd (as opposed to Ag/Au) are more promising to design next-generation nano-plasmonic devices due to their intense interband activity over a broad spectral range. Herein, we report Pt nanoparticle (NPs) enhanced broadband photoresponse in VA-MoS2. The optical absorbance of MoS2 is enhanced after the integration of Pt NPs, with a four-fold enhancement in photocurrent. The formation of Schottky junction at Pt-MoS2 interface inhibits electron transmission, suppressing the dark current and substantially reducing NEP. The plasmonic-enabled photodetector shows enhanced responsivity (432 AW-1, 800 nm) and detectivity (1.85 × 1014 Jones, 5 V) with a low response time (87 ms /84 ms), attributed to faster carrier transport. Additionally, a theoretical approach is adopted to calculate wavelength-dependent responsivity, which matches well with experimental results. These findings offer a facile approach to modulate the performance of next-generation optoelectronic devices for practical applications.