Journal of Materials Chemistry C最新文献

The rising demand for a sustainable and immaculate energy source on a global scale is fascinating regarding the usage and potential effects of green energy. Triboelectric nanogenerators have emerged as some of the major green energy sources, converting mechanical energy into electrical energy by using different electropositive and tribonegative materials. We used surface-modified multiwalled carbon nanotubes incorporated with a chitosan membrane as a tribopositive material in triboelectric nanogenerators for improved efficiency. We demonstrate that the chitosan-modified multiwalled carbon nanotube-based tribopositive material with PDMS as the tribonegative layer with a constant device size of 2 × 2 cm² produced a short circuit current density (J_sc) of 42.004 mA m⁻², an open circuit voltage (V_oc) of 244.90 volts, and a peak power density of 4.22 W m⁻², which can light up more than hundreds of LED lights. The high electrical performance of chitosan-modified multiwalled carbon nanotubes as a tribopositive material is attributed to the increased surface roughness and charge separation without causing significant charge leakage, which is produced by carbon nanotubes. Henceforth, the present work successfully introduces the use of chitosan-modified multiwalled carbon nanotubes as a tribopositive material for enhancing the TENG's output performance.

Correction for ‘A highly adhesive, self-healing and perdurable PEDOT:PSS/PAA–Fe³⁺ gel enabled by multiple non-covalent interactions for multi-functional wearable electronics’ by Qiang Gao et al., J. Mater. Chem. C, 2022, 10, 6271–6280, https://doi.org/10.1039/D2TC00613H.

Halide perovskites, particularly cesium lead iodide (CsPbI₃), have garnered significant attention due to their remarkable properties, including strong absorbance across the visible to near-infrared spectrum and a unique electronic structure that enhances their nonlinear optical (NLO) and optoelectronic applications. In this study, CsPbI₃ was synthesized using a hot injection technique and incorporated into a methyl methacrylate (MMA) matrix through polymerization to form CsPbI₃/PMMA organic glasses. The NLO properties of these glasses were characterized using the Z-scan technique with a nanosecond pulse laser at an excitation wavelength of 532 nm. Notably, the CsPbI₃/PMMA organic glasses exhibited a transition from saturable absorption (SA) to reverse saturable absorption (RSA) upon adjusting the input energy. Furthermore, by integrating a fiber ferrule coating-based CsPbI₃ saturable absorber (SA) into the laser cavity, we successfully realized a passively Q-switching (PQS) laser with a minimum pulse duration of 4.7 μs and a signal-to-noise ratio (SNR) of 50 dB at 1.55 μm, respectively. Consequently, the experimental findings indicate that CsPbI₃NP-based saturable absorbers (SAs) exhibit performance characteristics that are either comparable to or surpass those of conventional nanoparticle-based SAs. This observation underscores the significant potential of CsPbI₃-based SAs for applications in pulsed laser sources, suggesting their viability as advanced materials for enhancing laser performance and stability.

Stimuli-responsive ultralong organic phosphorescence (UOP) materials have drawn widespread attention owing to their potential in intelligent optoelectronics. However, their tunable emission characteristics are typically observed only after the removal of irradiation sources, which makes their applications heavily reliant on time-resolved technology. Herein, we propose a facile approach to achieve multi-stimuli-responsive and steady-state color-tunable luminescence for direct visualization-based applications by regulating multimode emissions in UOP materials. The steady-state emission color of the UOP material (PhP-B) can be regulated by multiple stimuli, including excitation wavelength, temperature, oxygen environment, mechanical force, and decay time. This work provides not only a new platform for developing multi-stimuli-responsive UOP materials, but also extends the direct visualization-based applications in multicolor patterns and visual monitoring.

Scanning tunnelling microscopy (STM) can be considered as a kind of nanocavity due to its structure of a metallic tip and substrate, where the interaction between molecular clusters and plasmons can be controlled by moving the tip, thus changing the level of radiation. In this article, we apply the semi-classical method by combining macroscopic quantum electrodynamics theory with open quantum systems theory, to calculate the transient radiation of molecules arranged horizontally and vertically in the nanocavity. Our calculations show that the free-space field-mediated coherent coupling in the former case is about two orders of magnitude larger than the dissipative coupling. In contrast, in the latter case, the coherent coupling is cancelled by the contribution of the scattering field mediated by plasmons, and the dissipative coupling and molecular excitation are dramatically enhanced by the plasmons, which enables the possibility of generating fast superradiant pulses. We clarify the configuration required to reach the plasmon-mediated superradiant pulses with the STM-based nanocavity, to guide further experiments in this direction.

Globally, one of the most significant environmental issues is water pollution caused by industrial waste. In this paper, two novel copper-based metal–organic frameworks (Cu-MOFs) were constructed using 1,4-naphthalene dicarboxylic acid (1,4-H₂NDC) as the main ligand, along with N,N′-bis(pyridin-3-yl)cyclohexane-1,4-dicarboxamide (3-bcda) or N,N′-bis(3-pyridyl)adipamide (3-bpaa) as the secondary ligand using the hydrothermal method. Moreover, Cu-based derived materials (Cu-1-X and Cu-2-X, X = 600/800/1000) were prepared at different high temperatures using Cu-MOFs as the precursors. Furthermore, a series of homogeneous nanofiber membrane materials were prepared by sol–gel and electrospinning techniques using Cu-based derived materials. As a result, Cu-1-1000@PAN and Cu-2-1000@PAN catalysts exhibited high-efficiency photocatalytic degradation activity in the water purification process, especially for the photodegradation of gentian violet (GV), achieving degradation rates of 92.66% and 96.92%, respectively. Meanwhile, the degradation rate remained above 90% after five cycles. The pyrolysis temperature significantly impacted the photodegradation process by reducing the band gap and improving the degradation efficiency. This research presents an ecologically sustainable and practical solution for the removal of pollutants in water and the treatment of industrial wastewater.

Correction for ‘A breathable and reliable thermoplastic polyurethane/Ag@K₂Ti₄O₉ composite film with an asymmetrical porous structure for wearable piezoresistive sensors’ by Ziwei Chen et al., J. Mater. Chem. C, 2022, 10, 12986–12997, https://doi.org/10.1039/D2TC02611B.

Zigzag graphene nanoribbons (ZGNRs) are highly promising low-dimensional spintronic materials due to their unique magnetic edge structure. However, the generation of a bipolar fully spin-polarized photocurrent through a ZGNR design has rarely been investigated. In this study, we propose a novel approach to achieving the bipolar fully spin-polarized photocurrent in ZGNRs via the linear photogalvanic effects (LPGEs) based on first-principles calculations. By applying a lateral voltage to the ZGNR device, we demonstrate the generation of the LPGE-induced bipolar fully spin-polarized photocurrent. Notably, this photocurrent exhibits 100% spin polarization. Moreover, both the magnitude and direction of the photocurrent can be effectively controlled by varying the applied positive and negative voltages. Furthermore, the bipolar fully spin-polarized characteristics of the photocurrent are independent of the light polarization angle and incident angle. Our research provides new opportunities for designing ZGNRs in graphene-based spintronic logic devices.

Correction for ‘A low-hysteresis, self-adhesive and conductive PAA/PEDOT:PSS hydrogel enabled body-conformable electronics’ by Qiang Gao et al., J. Mater. Chem. C, 2023, 11, 9355–9365, https://doi.org/10.1039/D3TC00850A.

Correction for ‘Highly stretchable and elastic PEDOT:PSS helix fibers enabled wearable sensors’ by Jing Chen et al., J. Mater. Chem. C, 2023, 11, 13358–13369, https://doi.org/10.1039/D3TC02381H.