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  • Online Resource  (13)
  • Royal Society of Chemistry (RSC)  (13)
  • Zheng, Jie  (13)
  • 2020-2024  (13)
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  • Online Resource  (13)
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  • Royal Society of Chemistry (RSC)  (13)
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  • 2020-2024  (13)
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  • 1
    Online Resource
    Online Resource
    The Edwards volume ensemble in cyclically sheared granular experiments
    Royal Society of Chemistry (RSC) ; 2022
    In:  Soft Matter Vol. 18, No. 18 ( 2022), p. 3557-3564
    Details
    In: Soft Matter, Royal Society of Chemistry (RSC), Vol. 18, No. 18 ( 2022), p. 3557-3564
    Abstract: We experimentally investigate the Edwards volume ensemble in cyclically sheared bidisperse disks of two friction coefficients ( μ ≈ 0.3 and μ → ∞) subjected to a range of shear amplitudes γ m . Despite the local and global anisotropy, hysteresis, and the potential long-range correlation of the free volume, the Edwards volume ensemble surprisingly provides an excellent statistical description of disk packings in cyclically sheared systems. Our finding can be better understood from the comprehensive analysis of the geometric and statistical properties of Voronoi cells of individual particles. First, the average degrees of anisotropy of Voronoi cells are weak at both the microscopic and macroscopic scales within a range of shear amplitudes γ m of up to γ m = 12% regardless of the inter-particle friction coefficients μ even though the azimuthal distributions of the Voronoi cell depend on μ . Second, there is only negligible hysteresis of global compactivity and volume fluctuations. Finally, the spatial correlations of the free volume and the orientation are weakly anisotropic and short ranged for practical purposes. Both results are independent of μ . Interestingly, our free-volume statistical results are consistent with the simple physical picture that the free volume is directly proportional to the compactivity.
    Type of Medium: Online Resource
    ISSN: 1744-683X , 1744-6848
    URL: Article
    DOI: 10.1039/D2SM00043A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2191476-X
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  • 2
    Online Resource
    Online Resource
    Turbulent-like velocity fluctuations in two-dimensional granular materials subject to cyclic shear
    Royal Society of Chemistry (RSC) ; 2022
    In:  Soft Matter Vol. 18, No. 5 ( 2022), p. 983-989
    Details
    In: Soft Matter, Royal Society of Chemistry (RSC), Vol. 18, No. 5 ( 2022), p. 983-989
    Abstract: We perform a systematic experimental study to investigate the velocity fluctuations in the two-dimensional granular matter of low and high friction coefficients subjected to cyclic shear of a range of shear amplitudes, whose velocity fields are strikingly turbulent-like with vortices of different scales. The scaling behaviors of both the transverse velocity power spectra E T ( k ) ∝ k − α T and, more severely, the longitudinal velocity power spectra E L ( k ) ∝ k − α L are affected by the prominent peak centered around k ≈ 2π of the inter-particle distance due to the static structure factor of the hard-particle nature in contrast to the real turbulence. To reduce the strong peak effect to the actual values of α ν (the subscript ‘ ν ’ refers to either T or L), we subsequently analyze the second-order velocity structure functions of S (2)ν( r ) in real space, which show the power-law scalings of S (2)ν( r ) ∝ r β ν for both modes. From the values of β ν , we deduce the corresponding α ν from the scaling relations of α ν = β ν + 2. The deduced values of α ν increase continuously with the shear amplitude γ m , showing no signature of yielding transition, and are slightly larger than α ν = 2.0 at the limit of γ m → 0, which corresponds to the elastic limit of the system, for all γ m . The inter-particle friction coefficients show no significant effect on the turbulent-like velocity fluctuations. Our findings suggest that the turbulent-like collective particle motions are governed by both the elasticity and plasticity in cyclically sheared granular materials.
    Type of Medium: Online Resource
    ISSN: 1744-683X , 1744-6848
    URL: Article
    DOI: 10.1039/D1SM01516H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2191476-X
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  • 3
    Online Resource
    Online Resource
    Conjugated molecule based 2D perovskites for high-performance perovskite solar cells
    Royal Society of Chemistry (RSC) ; 2021
    In:  Journal of Materials Chemistry A Vol. 9, No. 38 ( 2021), p. 21910-21917
    Details
    In: Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 9, No. 38 ( 2021), p. 21910-21917
    Abstract: Conjugated molecules have been typically utilized as either hole or electron extraction layers to boost the device performance of perovskite solar cells (PSCs), formed from three-dimensional (3D) perovskites, due to their high charge carrier mobility and electrical conductivity. However, the passivating role of conjugated molecules in creating two-dimensional (2D) perovskites has rarely been reported. In this study, we report novel conjugated aniline 3-phenyl-2-propen-1-amine (PPA) based 2D perovskites and further demonstrate efficient and stable PSCs containing a (PPA) x (MAPbI 3 ) 1− x /MAPbI 3 bilayer thin film (where MA is CH 3 NH 3 + ). The (PPA) x (MAPbI 3 ) 1− x /MAPbI 3 bilayer thin film possesses superior crystallinity and passivated trap states, resulting in enhanced charge transport and suppressed charge carrier recombination compared to those of a 3D MAPbI 3 thin film. As a result, PSCs containing the (PPA) x (MAPbI 3 ) 1− x /MAPbI 3 bilayer thin film exhibit a power conversion efficiency (PCE) of 21.98%, which is approximately a 25% enhancement compared to that of the MAPbI 3 thin film. Moreover, un-encapsulated PSCs containing the (PPA) x (MAPbI 3 ) 1− x /MAPbI 3 bilayer thin film retain 50% of their initial PCE after 1200 hours in an ambient atmosphere (25 °C, and 30 ± 10 humidity), whereas PSCs with the 3D MAPbI 3 thin film show significant degradation after 100 hours and a degradation of more than 50% of their original PCE after 500 hours. These results demonstrate that the incorporation of conjugated molecules as organic spacer cations to create 2D perovskites on top of 3D perovskites is an effective way to approach high-performance PSCs.
    Type of Medium: Online Resource
    ISSN: 2050-7488 , 2050-7496
    URL: Article
    DOI: 10.1039/D1TA05934C
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2702232-8
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  • 4
    Online Resource
    Online Resource
    Direct plasma phosphorization of Cu foam for Li ion batteries
    Royal Society of Chemistry (RSC) ; 2020
    In:  Journal of Materials Chemistry A Vol. 8, No. 33 ( 2020), p. 16920-16925
    Details
    In: Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 8, No. 33 ( 2020), p. 16920-16925
    Type of Medium: Online Resource
    ISSN: 2050-7488 , 2050-7496
    URL: Article
    DOI: 10.1039/D0TA02512G
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2020
    detail.hit.zdb_id: 2702232-8
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  • 5
    Online Resource
    Online Resource
    Conformational-specific self-assembled peptides as dual-mode, multi-target inhibitors and detectors for different amyloid proteins
    Royal Society of Chemistry (RSC) ; 2022
    In:  Journal of Materials Chemistry B Vol. 10, No. 11 ( 2022), p. 1754-1762
    Details
    In: Journal of Materials Chemistry B, Royal Society of Chemistry (RSC), Vol. 10, No. 11 ( 2022), p. 1754-1762
    Abstract: Prevention and detection of misfolded amyloid proteins and their β-structure-rich aggregates are the two promising but different (pre)clinical strategies to treat and diagnose neurodegenerative diseases including Alzheimer's diseases (AD) and type II diabetes (T2D). Conventional strategies prevent the design of new pharmaceutical molecules with both amyloid inhibition and detection functions. Here, we propose a “like-interacts-like” design principle to de novo design a series of new self-assembling peptides (SAPs), enabling them to specifically and strongly interact with conformationally similar β-sheet motifs of Aβ (association with AD) and hIAPP (association with T2D). Collective in vitro experimental data from thioflavin (ThT), atomic force microscopy (AFM), circular dichroism (CD), and cell assay demonstrate that SAPs possess two integrated functions of (i) amyloid inhibition for preventing both Aβ and hIAPP aggregation by 34–61% and reducing their induced cytotoxicity by 7.6–35.4% and (ii) amyloid sensing for early detection of toxic Aβ and hIAPP aggregates using in-house SAP-based paper sensors and SPR sensors. The presence of both amyloid inhibition and detection in SAPs stems from strong molecular interactions between amyloid aggregates and SAPs, thus providing a new multi-target model for expanding the new therapeutic potentials of SAPs and other designs with built-in amyloid inhibition and detection functions.
    Type of Medium: Online Resource
    ISSN: 2050-750X , 2050-7518
    URL: Article
    DOI: 10.1039/D1TB02775A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2702241-9
    detail.hit.zdb_id: 2705149-3
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  • 6
    Online Resource
    Online Resource
    Ag–O–Ce 3+ atomic interface and surface oxygen vacancies on CeO 2 synergistically promoted the selective visible photocatalytic reduction of carbon dioxide
    Royal Society of Chemistry (RSC) ; 2023
    In:  Journal of Materials Chemistry C Vol. 11, No. 22 ( 2023), p. 7320-7330
    Details
    In: Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 22 ( 2023), p. 7320-7330
    Abstract: The CO 2 conversion into high-value-added chemicals is highly meaningful. Photocatalysis is a feasible and promising method to realize this transformation, in which photocatalyst plays a key role. Ceria (CeO 2 ) has attracted extensive attention in the photocatalytic conversion of CO 2 . However, the surface oxygen vacancies (V O s) of CeO 2 are unstable and lead to low reactivity. Herein, we found that the highly dispersed Ag species via coordination method stabilized the V O s of CeO 2 , and the synergy of the Ag species and V O s played a crucial role in the selective photocatalytic CO 2 conversion. The formed Ag–O–Ce 3+ atomic interface promoted the electron transfer from Ce 3+ defective sites to Ag atoms, thereby improving the separation efficiency of the charge carriers, leading to enhanced photocatalytic activity. The V O s-sufficient CeO 2 had high selectivity for the photocatalytic reduction of CO 2 to methanol, while highly selective acetone was achieved on Ag- V O s/CeO 2 . The synergy of Ag and V O s that form a frustrated Lewis pair promoted not only the adsorption and activation of CO 2 molecules but also the selectivity of products. The key intermediate species, *COOH and *CH 3 , were stably preserved by the synergy of Ag and V O s. This work provides insight into the selective conversion of CO 2 to high-value-added organics via the surface regulation of photocatalysts.
    Type of Medium: Online Resource
    ISSN: 2050-7526 , 2050-7534
    URL: Article
    DOI: 10.1039/D3TC00677H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 2702245-6
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  • 7
    Online Resource
    Online Resource
    Macrocyclization of bioactive peptides with internal thiazole motifs via palladium-catalyzed C–H olefination
    Royal Society of Chemistry (RSC) ; 2022
    In:  Chemical Communications Vol. 58, No. 31 ( 2022), p. 4861-4864
    Details
    In: Chemical Communications, Royal Society of Chemistry (RSC), Vol. 58, No. 31 ( 2022), p. 4861-4864
    Abstract: Peptides containing thiazole fragments represent a large group of bioactive compounds with potential medicinal applications. However, methods for efficient synthesis of these compounds with structural diversity are limited. Herein, we report a method for modification and macrocyclization of thiazole-containing peptides through palladium-catalyzed δ-C(sp 2 )–H olefination. In this protocol, the thiazole and neighboring amide bonds act as directing groups, which allows site-specific olefination of phenylalanine, tryptophan and tyrosine residues. This chemistry exhibits broad substrate scope and provides facile access to peptide-peptide conjugates and peptide macrocycles. Our results highlight the potency and applicability of thiazole motifs in promoting Pd-catalyzed functionalization of peptides.
    Type of Medium: Online Resource
    ISSN: 1359-7345 , 1364-548X
    URL: Article
    DOI: 10.1039/D1CC06764H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 1472881-3
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  • 8
    Online Resource
    Online Resource
    Synergy of surface fluorine and oxygen vacancy of TiO 2 nanosheets for O 2 activation in selective photocatalytic organic transformations
    Royal Society of Chemistry (RSC) ; 2021
    In:  Journal of Materials Chemistry C Vol. 9, No. 5 ( 2021), p. 1593-1603
    Details
    In: Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 9, No. 5 ( 2021), p. 1593-1603
    Type of Medium: Online Resource
    ISSN: 2050-7526 , 2050-7534
    URL: Article
    DOI: 10.1039/D0TC04874G
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2702245-6
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  • 9
    Online Resource
    Online Resource
    Suppressing Ge-vacancies to achieve high single-leg efficiency in GeTe with an ultra-high room temperature power factor
    Royal Society of Chemistry (RSC) ; 2021
    In:  Journal of Materials Chemistry A Vol. 9, No. 41 ( 2021), p. 23335-23344
    Details
    In: Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 9, No. 41 ( 2021), p. 23335-23344
    Abstract: GeTe is among the best medium-temperature thermoelectrics. Its high performance originates from band convergence at the phase transition and low lattice thermal conductivity due to Peierls distortion. In most studies, the peak performance ( zT ) in GeTe is achieved by designing and optimizing its electronic and thermal transport properties near its phase transition temperature (700 K). However, for efficient power harvesting, a high average zT ( zT ave ) across a wide temperature range is desirable. This calls for a holistic performance evaluation and enhancement not only near 700 K, but also at room temperature. In this work, we leveraged on the confluence of performance enhancement strategies via Cu 2 Te alloying and In resonant doping to achieve a record-high room temperature power factor of 2800 μW mK −2 , and an average power factor of 3700 μW mK −2 between 323 and 773 K. The magnitude of the room temperature power factor is comparable to that of the state-of-the-art Bi 2 Te 3 based compounds. In the optimized sample with Bi doping, a room temperature zT of 0.5 is achieved, highest for lead-free GeTe. Ultimately, a high peak zT of 2.1 at 723 K and single leg power conversion efficiency of 11.8% were achieved between 323 and 745 K, which are among the highest reported for lead-free GeTe.
    Type of Medium: Online Resource
    ISSN: 2050-7488 , 2050-7496
    URL: Article
    DOI: 10.1039/D1TA05866E
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2702232-8
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  • 10
    Online Resource
    Online Resource
    Near-infrared photodetectors based on CH 3 NH 3 PbI 3 perovskite single crystals for bioimaging applications
    Royal Society of Chemistry (RSC) ; 2022
    In:  Journal of Materials Chemistry C Vol. 10, No. 1 ( 2022), p. 274-280
    Details
    In: Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 10, No. 1 ( 2022), p. 274-280
    Abstract: Near-infrared (NIR) photodetector based on CH 3 NH 3 PbI 3 perovskite single crystal has potential application in NIR bioimaging in the first biological window (700–900 nm). To demonstrate NIR bioimaging with the CH 3 NH 3 PbI 3 single crystal photodetector, the high-performance NIR photodetector based on the CH 3 NH 3 PbI 3 single crystal with the excellent crystalline quality was fabricated, the microscopic imaging system was constructed, and the in vitro NIR bioimaging of the mouse organs was performed in this work. The NIR images of the mouse kidney, mouse spleen, and mouse ovary were consistent with the corresponding real objects, indicating the feasibility of the photodetector for NIR bioimaging. The results reported in this work show that the NIR photodetector based on the CH 3 NH 3 PbI 3 single crystal is expected to be widely used in bioimaging.
    Type of Medium: Online Resource
    ISSN: 2050-7526 , 2050-7534
    URL: Article
    DOI: 10.1039/D1TC04961E
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2702245-6
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