Biosurface and Biotribology
·
2019
·Vol. 5
·期 2
·46-51
·
IF 0
Jiao Wang,Chengzhen Chu,Yang He,Tao Xiang,Shaobing Zhou
The surface topography has a great effect on the behaviour of adherent cells. We report an efficient method to prepare shape memory surfaces with dynamically changed micropatterns, which can be induced by near-infrared (NIR) light by varying the power density. After polydopamine (PDA) was coated on the cross-linked polyethylene glycol-poly(ɛ-caprolactone), the surface temperature increases by 40°C at room temperature when 808 nm light with 1.0 W/cm 2 is used because of the photothermal properties of PDA. This temperature increase is enough for the shape recovery of the pressed micropatterns. The depth of the recovered micropatterns is controllable by adjusting the power density of the 808 nm light. The NIR-induced micropatterns efficiently regulate the morphology and alignment of endothelial cells. Therefore, NIR-induced shape memory surfaces have the potential to be used in remote-controlled devices.
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DOI
Science Advances
·
2024
·Vol. 10
·期 18
·
IF 11.7
Ji Jiang,Mingming Shi,Zhengchang Xia,Yong Cheng,Zema Chu,Wei Zhang,Jingzhen Li,Zhigang Yin,Jingbi You,Xingwang Zhang
Perovskite light-emitting diodes (PeLEDs) have attracted great attention in recent years; however, the halogen vacancy defects in perovskite notably hamper the development of high-efficiency devices. Previously, large-sized passivation agents have been usually used, while the effect of defect passivation is limited due to the weak bonding or the large space steric hindrance. Here, we predict that the ultrasmall-sized formate (Fa) and acetate (Ac) have more efficient passivation ability because of the stronger binding with the perovskite, as demonstrated by density functional theory calculation. We introduce ultrasmall-sized cesium salts (CsFa/CsAc) into buried interface, which can also diffuse into the bulk, resulting in both buried interface and bulk passivation. In addition, the improved perovskite growth has been found due to the enhanced hydrophily after introducing CsFa/CsAc as additive. According to these advantages, a pure-red PeLED with 24.2% efficiency at 639 nm has been achieved.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Wenbei Yu,Jing Liu,Ming Yi,Jiuxiang Yang,Wenda Dong,Chao Wang,Heng Zhao,Hemdan S.H. Mohamed,Zhao Wang,Lihua Chen,Yu Li,Bao-Lian Su
We report the well-designed active {1 1 0} and {1 1 1} faceted Cu 2 O hollow nanospheres (Cu 2 O-HNs) for the quick removal of the high concentration pollutants in water. For the first time, these Cu 2 O-HNs combine the advantages of the active facets, hollow structure and nanostructures. The abundance of dangling Cu atoms in two active facets results in positively charged surface to effectively react with the negatively charged pollutants. The hollow structure provides the opportunity to take full use of these active sites. Consequently, the active faceted Cu 2 O-HNs demonstrate excellent adsorption and photodegradation capacities for high concentrated anionic dyes. The smallest Cu 2 O-HNs (~100 nm) can adsorb ~90% of methyl blue (MB) (100 mg L −1 ) in 10 min and degrade ~92% of MB (100 mg L −1 ) in 10 min under visible-light. In particular, a film consisting of the smallest Cu 2 O-HNs can quickly remove high concentrated organic dyes and be reused after solar light irradiation for 10 min in air, showing the promising practical application for the removal of organic pollutants.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jiajia Wang,Li Li,Ruyi Wei,Renfeng Dong
Here, we report the first PbS quantum dot (QD)-based micromotors with NIR-I light-driven photocatalytic propulsion and NIR-II fluorescence. Under the irradiation of NIR-I light (808 nm), PbS QD-doped cuprous oxide (Cu2O@PbS) micromotors can display efficient propulsion in a variety of biocompatible fuels such as malic acid, glucose, and urea. Among them, the Cu2O@PbS micromotors exhibit the best propulsion performance in a very low concentration of malic acid, with an average speed as high as 11.86 μm/s. The enhanced NIR-I photocatalytic activity of Cu2O@PbS micromotors benefits from the doping of NIR-I PbS QDs that can be excited by NIR-I light and exhibit high electron transport efficiency. The doped PbS QDs can effectively increase the absorption efficiency of the micromotors in the NIR-I region while also inhibiting the recombination of photogenerated electron–hole pairs. Interestingly, due to the presence of NIR PbS QDs, the Cu2O@PbS micromotors demonstrate prominent and stable NIR-II fluorescence (emission wavelength: 1100 nm), which offer promising potential for visualization of their position in vivo. In comparison to other photocatalytic micromotors, the simple fabrication strategy, excellent NIR-II fluorescence, together with the NIR-I light-dependent propulsion behavior of the current Cu2O@PbS micromotors, thus pave the way for further development of advanced smart “robots” for intelligent biomedical applications.
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高影响因子
Laser & Photonics Reviews
·
2022
·Vol. 16
·期 10
·2200091
·
IF 10.947
Tianyu Liu,Chenying Yang,Zhuping Fan,Xu Chen,Zeng Chen,Yirong Su,Hanbo Zhu,Fangling Sun,Tingming Jiang,Wenjuan Zhu,Weidong Shen,Jianjun He,Haiming Zhu,Xu Liu,Yang (Michael) Yang
Perovskite light-emitting diodes (PeLEDs) have attracted much attentions due to the superior optoelectronic properties such as pure spectrum, high photoluminescence quantum yield, tunable emission, and ease of fabrication. Though lots of progresses have been made on PeLEDs and optically pumped lasers, microcavity perovskite lasing device under electrical pumping remains extremely challenging. Microcavity perovskite LEDs can be considered as a step toward laser diode due to the common structure of resonant cavity. In this study, a new type of metal-dielectric microcavity PeLED is designed and fabricated by using 2.5 pairs of TiO 2 /SiO 2 distributed bragg reflector (DBR) and Al as cavity coplanar mirrors. A microcavity device with forward spectral full-width at half-maximum of 11.8 and 9.5 nm, under electrical and optical excitations, respectively, the directional forward emission within 30° is enhanced by 3 times compared to the control device without cavity is realized. To the best of the knowledge, this study demonstrates the narrowest spectrum for three-demisional PeLEDs so far, it helps to expand the color space in display applications and may also serve as a reference device for solution processed perovskite exciton–polariton electroluminescent devices and electrically driven vertical cavity surface emitting lasers due to the similar device structure and processing.
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高影响因子
NANOTECHNOLOGY
·
2017
·Vol. 28
·期 36
·365601
·
IF 3.44
Chun Sun,Xinyu Shen,Yu Zhang,Yu Wang,Xingru Chen,Changyin Ji,Hongzhi Shen,Hengchong Shi,Yiding Wang,William W Yu
By controlling the hydrolysis of alkoxysilanes, highly luminescent, transparent and flexible perovskite quantum dot (QD) gels were synthesized. The gels could maintain the structure without shrinking and exhibited excellent stability comparing to the QDs in solution. This in situ fabrication can be easily scaled up for large-area/volume gels. The gels integrated the merits of the polymer matrices to avoid the non-uniformity of light output, making it convenient for practical LED applications. Monochrome and white LEDs were fabricated using these QD gels; the LEDs exhibited broader color gamut, demonstrating better property in the backlight display application.
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高影响因子
Advanced Sustainable Systems
·
2024
·
IF 6.5
Jiaping Zhang,Yukun Li,Hengwei Lin,Dirk Poelman,Jiaren Du
Persistent luminescence (PersL) materials attract extensive interest in the scientific community nowadays due to their great potential in various fields, such as night-vision signage, high-level anticounterfeiting, in vivo bioimaging, and X-ray extension imaging. However, the majority of PersL materials are synthesized by time- and energy-consuming processes such as high-temperature solid-state reactions or hydrothermal synthesis. In this work, a rapid one-step microwave-assisted solid state (MASS) synthesis of La 2 MgGeO 6 -based robust double perovskite PersL material is successfully achieved, without any secondary thermal treatment, which limits the total synthesis time to 30 min. Furthermore, this MASS approach is also employed to integrate multimodal luminescence into one single La 2 MgGeO 6 matrix with triple dopants (Mn 4+ , Yb 3+ , and Er 3+ ) for light conversion. Impressively, multimodal and multicolor luminescence is obtained with different responsiveness of external stimulations. Notably, the energy transfer among different trapping levels is observed upon photo-stimulation. This work provides a good example of the feasibility of MASS method to prepare luminescent materials with abundant optical features in an efficient, sustainable, environmentally friendly, and easily manageable way.
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高影响因子
Advanced Powder Materials
·
2021
·
IF 0
Shaoju Jian,Zhiwei Tian,Jiapeng Hu,Kaiyin Zhang,Lin Zhang,Gaigai Duan,Weisen Yang,Shaohua Jiang
A series of La-doped ZnO (La/ZnO) nanofibers were prepared by electrospinning-calcination technology and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), ultraviolet–visible (UV–Vis) absorption spectroscopy and specific surface area analysis. The effect of numerous operational parameters involving calcination temperature, La doping amount, La-doped ZnO concentration and initial Rhodamine B (Rh B) concentration on photocatalytic efficiency of the composite has been analyzed by using Rh B for degradation under the illumination of visible light. Under optimum conditions, ZnO doped with 1.5 at.% La achieved 94.31% Rh B degradation after 510 min of visible light illumination. The kinetic data of La/ZnO catalyst for Rh B photodegradation fitted the Langmuir-Hinshelwood first-order (LHFO) kinetic model well.
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DOI
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Peng Bai,Xinli Tong,Jun Wan,Yiqi Gao,Song Xue
The photocatalytic selective transformation of amines is a green and cost-effective technology to obtain value-added products in chemical industry. In this work, a series of bismuth-based photocatalysts including Bi 2 MoO 6 , Bi 2 WO 6 , Bi 5 O 7 Cl, Bi 5 O 7 Br, Bi 5 O 7 I, BiPO 4 , BiVO 4 , Bi 2 O 3 and various morphology Bi 2 O 2 CO 3 (flower-like, sponge-like, plate-like and spherical) were synthesized and employed in the aerobic oxidative coupling of benzylamine. It is found that flower-like Bi 2 O 2 CO 3 exhibited the highest photocatalytic activity, in which a 100% conversion of benzylamine with 99.0% selectivity of N -benzylidenebenzylamine was obtained at room temperature. Moreover, the photocatalytic oxidative coupling processes of various aromatic and aliphatic amines were further investigated, and excellent yields and selectivities of corresponding products are attained. Then, based on characterization results (XRD, SEM, BET and XPS, etc.) of catalyst, high photocatalytic activity of flower-like Bi 2 O 2 CO 3 is attributed to thin nanopetals, low band gap, the morphology and large specific surface area. Finally, a possible reaction mechanism is proposed for the photocatalytic oxidative coupling of benzyl amine.
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DOI
高影响因子
Water Cycle
·
2023
·
IF 0
Jiaolong Zhang,Shuting Gou,Zhe Yang,Chaolin Li,Wenhui Wang
The application of promising g-C 3 N 4 has been limited by poor photogenerated electron-hole separation and limited absorption for visible light. Sulfamethoxazole (SMX) is a typical antibiotic drug that is used worldwide and hard to be disposed through conventional wastewater treatment methods. Herein, S-scheme Fe 2 O 3 /g-C 3 N 4 heterojunction was successfully prepared via a facile one-step sintering method and applied to photodegrade SMX under visible light irradiation. The integration of Fe 2 O 3 and g-C 3 N 4 shows superior charge separation and light absorption ability. As a result, the removal efficiency of 11 wt% Fe 2 O 3 /g-C 3 N 4 reaches to 99.2% within 30 min, which is visibly higher than 59.5% of pure g-C 3 N 4 . ·O 2 − and ·OH are demonstrated to be the predominant active species for SMX photodegradation, and the possible degradation pathway is also proposed based on electronic band structure of Fe 2 O 3 /g-C 3 N 4 heterojunction. This study presents a facile construction of g-C 3 N 4 based S-scheme photocatalyst and offers an environmentally friendly approach to effectively remove organic pollutants using renewable solar energy.
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DOI
Advanced Energy and Sustainability Research
·
2022
·Vol. 3
·期 6
·2100200
·
IF 0
Ping She,Yuanyuan Qi,Tengfei Bao,Hongbang Rui,Buyuan Guan,Heng Rao,Jun-Sheng Qin
Molecular catalysis for photocatalytic CO 2 reduction (PCR) has recently attracted much attention, whereas its scaled practical application is usually limited by the difficulty of recycling and its photochemical instability in homogeneous solutions. Immobilization of molecular catalysts on solid matrices, that is, covalent bonds or noncovalent interactions, provides a great blueprint to tackle this issue. Herein, a bioinspired self-supporting phthalocyanine@ZnIn 2 S 4 (Pc@ZnIn 2 S 4 ) foam by growing ZnIn 2 S 4 nanosheets on the commercialized polyurethane foam (PF) followed by loading amino-modified cobalt phthalocyanine (CoPc–NH 2 ) is developed. The self-supporting Pc@ZnIn 2 S 4 PF carrier can be directly taken out of the reaction system for the next reaction cycle without any other procedures. The optimized Pc@ZnIn 2 S 4 PF demonstrates superior PCR efficiency under visible light ( λ = 420 nm), achieving 474.65 μmol CO g −1 catalyst after 8 h. The superior PCR performance is attributed to the elevated light-harvesting ability induced by the porous foam structure and the enhanced charge separation efficiency facilitated by the dimension-matched interface between ZnIn 2 S 4 and Pc. The special design of the immobilization molecular catalyst on solid supporters presented herein develops an efficient strategy for solar-driven energy conversion.
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DOI
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Lihui Liu,Ruimin Dong,Danqing Ye,Yao Lu,Pengfei Xia,Lingling Deng,Yu Duan,Kun Cao,Shufen Chen
Graphene is a promising flexible transparent electrode, and significant progress in graphene-based optoelectronic devices has been accomplished by reducing the sheet resistance and tuning the work function. Herein, phosphomolybdic acid (PMA) is proposed as a novel p-type chemical dopant for graphene, and the optical and electrical properties of graphene are investigated systematically. As a result, the monolayer graphene electrode with lower sheet resistance and work function are obtained while maintaining a high transmittance. The Raman spectrum proves the p-type doping effect of PMA on graphene, and the X-ray photoelectron spectroscopy results reveal the mechanism, which is that the electrons transfer from graphene to PMA through the Mo–O–C bond. Furthermore, using the PMA-doped graphene anode, organic and perovskite light-emitting diodes obtained the maximum efficiencies of 129.3 and 15.6 cd/A with an increase of 50.8 and 36.8% compared with the pristine counterparts, respectively. This work confirms that PMA is a potential p-type chemical dopant to achieve an ideal graphene electrode and demonstrates the feasibility of PMA-doped graphene in the practical application of next-generation displays and solid-state lighting.
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高影响因子
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