Bioactive Materials
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2022
·
IF 16.874
Yimeng Shu,Ming Ma,Xiaoxia Pan,Muhammad Shafiq,Huizhu Yu,Hangrong Chen
Mesenchymal stem cells (MSCs) transplantation is a promising approach for pulmonary fibrosis (PF), however it is impeded by several persistent challenges, including the lack of long-term tracking, low retention, and poor survival of MSCs, as well as the low labeling efficiency of nanoprobes. Herein, a cobalt protoporphyrin IX (CoPP) aggregation-induced strategy is applied to develop a multifunctional nano-self-assembly (ASCP) by combining gold nanoparticle (AuNPs), superparamagnetic iron oxide nanoparticles (SPIONs), and CoPP through a facile solvent evaporation-driven approach. Since no additional carrier materials are employed during the synthesis, high loading efficiency of active ingredients and excellent biocompatibility are achieved. Additionally, facile modification of the ASCPs with bicyclo[6.1.0]nonyne (BCN) groups (named as ASCP-BCN) enables them to effectively label MSCs through bioorthogonal chemistry. The obtained ASCP-BCN could not only help to track MSCs with AuNP-based computed tomography (CT) imaging, but also achieve an SPIONs-assisted magnetic field based improvement in the MSCs retention in lungs as well as promoted the survival of MSCs via the sustained release of CoPP. The in vivo results demonstrated that the labeled MSCs improved the lung functions and alleviated the fibrosis symptoms in a bleomycin–induced PF mouse model. Collectively, a novel ASCP-BCN multifunctional nanoagent was developed to bioorthogonally-label MSCs with a high efficiency, presenting a promising potential in the high-efficient MSC therapy for PF.
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高影响因子
Materials Advances
·
2022
·Vol. 3
·期 18
·7037-7042
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IF 0
Xiaoli Zhang,Yajun Lou,Lei Hu,Weijia Duan,Guojie Chen,Bingfeng Fan,Weiren Zhao,Xinhai Zhang
InP-based quantum dots (QDs) have attracted considerable interest in the optoelectronic field owing to their favorable properties. However, to date, the nonlinear optical properties and ultrafast photonics applications of InP-based QDs have rarely been explored. In this study, InP/ZnSe/ZnS QDs with surface fluorination treatment (InP-HF) have been fabricated. Consequently, the nonlinear saturable absorption properties of such InP-HF QDs with surface modification are explored by realizing a modulation depth of 3.27% and a saturable intensity of 1.10 MW cm−2. We report on the passive Q-switching of a diode-pumped Nd:YVO4 near-infrared laser at 1064 nm (∼1.0 μm) using InP-HF QDs as a SA. At this wavelength, the threshold of pump power is as low as 1 W, and the maximum average output power and the shortest pulse widths are 2.5 W and 178 ns, respectively. The laser results suggest that surface fluorination treated InP-HF QDs could be very promising for generating ultrashort pulse visible lasers.
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Journal of Physical Chemistry C
·
2022
·
IF 4.177
Shuoshuo Zang,Guoqing Xu,Renci Yang,Qinyi Zhu,Hewen Liu
It is still challenging to achieve both good stability and high PLQYs for perovskite NCs because of their ionic nature and structural defects. In this work, tungstosilicic acid (TSA) is used for the surface passivation of cesium lead halide perovskite NCs. Near-unity PLQY is achieved for CsPbBr3 NCs after surface passivation with a suitable amount of TSA. XRD in conjunction with XPS analysis shows that TSA binds hydrophobic chains of OAm onto the surface of CsPbBr3 NCs. XPS results also demonstrate that TSA passivation can change the charge distribution of the cations on the surface layers, which can enhance the interaction with surface traps. PL decay analysis reveals that trap states arising from the surface defects are significantly decreased after TSA passivation. TSA-passivated CsPbBr3 NCs demonstrate long-term ambient stability and good resistances to polar solvents and maintain about 80% of their initial PL intensity after storage under ambient conditions for 50 days. It is further found that TSA passivation is able to improve the PLQYs of a broad spectrum of CsPbX3 (X = Cl, Br, I) NCs without hindering the tunability of the band gaps and PL colors of CsPbX3 NCs via anion exchange.
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 31
·18860-18867
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IF 3.945
Yalei Gao,Tao Zhang,Jun Liu,Hongjun Liu,Meixian Li,Fuchi Liu,Wenjie Kong,Fengzhen Lv,Yong Yang,Lizhen Long
Perovskite materials are prominent candidates for many high-performance optoelectronic devices. The rare-earth lead-free CsEuCl3 perovskite nanocrystals are extremely unstable, which makes it very difficult to study their physicochemical properties and applications. Herein, we improved the stability of rare-earth based CsEuCl3 nanocrystals by employing a silica-coating for the first time. Simultaneously, the naturally formed “hollow” regions with an obviously blue-shifted PL emission were first observed inside the CsEuCl3 nanocrystals during the period of storage. Density functional theory (DFT) calculations showed that the formed “hollow” regions are due to the internal defect evolution in the perovskite lattice, which is also responsible for the increase of the bandgap and the blue-shift of emission. Additionally, the rapid decline of luminescence is probably due to the nanocrystals’ final cracking with the expansion of the “hollow” regions. This work helps to understand the relationship between defects and luminescence properties, and provides guidance for the design of more stable lead-free perovskite nanocrystals.
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 29
·10609-10615
·
IF 8.067
Huwei Li,Long Tian,Zhan Shi,Yao Li,Chengyu Li,Jing Feng,Hongjie Zhang
Lead-free double perovskite (DP) nanocrystals (NCs) with low-toxicity and good stability have attracted attention for light-emitting device (LED) applications. However, low photoluminescence quantum yields (PLQYs) limit their development. Here, we synthesized Tb3+,Sb3+ co-doped Cs2NaInCl6 NCs using an improved hot-injection method. The as-prepared Cs2NaInCl6:Sb,Tb NCs exhibit dual-emission from self-trapped excitons (STEs) to Tb3+ ions. The maximum PLQY of Cs2NaInCl6:Sb,Tb NCs is 74%, which exceeds that of most lead-free DP NCs. The energy transfer channel from STEs to Tb3+ ions in Tb3+,Sb3+ co-doped Cs2NaInCl6 NCs has been proved and studied. In addition, we further introduce Mn2+ ions and fabricate the corresponding warm white light-emitting diodes (WLEDs). This work provides a reliable way to realize DP NCs with enhanced photoluminescence properties and further promoted their development for WLED applications.
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Advanced Optical Materials
·
2022
·Vol. 10
·期 18
·2200706
·
IF 10.05
Xuying Feng,Yuhang Sheng,Kewei Ma,Fangjian Xing,Cihui Liu,Xifeng Yang,Hongqiang Qian,Shude Zhang,Yunsong Di,Yushen Liu,Zhixing Gan
Traditional fluorescent anti-counterfeiting labels can be easily cloned due to the lack of sufficient security. Therefore, multilevel anti-counterfeiting techniques with higher security need to be constantly explored. This study reports a multilayer composite structure containing Mn doped CsPbCl 3 (Mn:CsPbCl 3 ) perovskite quantum dots (PQDs) layer and CsPbBr 3 PQDs layer. The encrypted information is patterned on the Mn:CsPbCl 3 PQDs layer with weak orange fluorescence, which is concealed by the brighter green fluorescence of CsPbBr 3 PQDs at the upper layer. Based on the well-separated photoluminescence (PL) peak positions, inverse PL temperature-dependences and distinct PL lifetimes of these two PQDs, the encrypted information can be read out by adding cut-off filter, heating and using ultrafast camera (UCA)/pulsed excitation (PE). This multilevel anti-counterfeiting label significantly increases the difficulties of imitation meanwhile no expensive equipment is required for the verification of authenticity. Moreover, two bits of binary numbers that can be represented by dual emissions of the Mn:CsPbCl 3 PQDs by changing the doping content, which significantly increases the information storage capacity, are also demonstrated.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 13
·2288
·
IF 5.719
Chenyu Zhu,Qiao Wang,Guorong Sun,Suo Zhao,Yao Wang,Tonghui Li,Xianglong Hao,Mikhail Artemyev,Jianguo Tang
In this paper, hydrophobic luminescent CdSe quantum dots are successfully dispersed in a mixture of styrene and methyl methacrylate through the oleic to methacrylic acid ligand exchange. Further in situ solution polymerization of the quantum dots in a mixture of styrene and methyl methacrylate followed by electrospinning allowed us to prepare luminescence hybrid styrene-co-methyl methacrylate fibers embedded with quantum dots. CdSe@P(S+MMA) hybrid fibers with 27% quantum yield showed excellent moisture, heat and salt resistance with a photoluminescence output below 120 °C. When dry heated, the hybrid fibers of the fluorescence signals decreased with temperature to 79%, 40%, 28%, 20% and 13% at 120 °C, 140 °C, 160 °C, 180 °C and 200 °C, respectively, due the to the chemical degradation of CdSe QDs. Such hybrid fibers show the potential to manufacture wearable moisture- and heat-sensing protective clothing in a 120–200 °C range due to the thermal-induced quenching of quantum dot photoluminescence.Keywords:CdSe;polymer;hybrid fibers;photoluminescence thermal sensor
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 30
·11416-11426
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IF 4.569
Qinghuan Bian,Huanxi Liao,Changcun Tang,Kunjiao Li,Jiabao Wan,Yanhe Xiao,Baochang Cheng,Shuijin Lei
Multifunctional multinary metal chalcogenides have long been a research hotspot in the field of materials chemistry due to their rich composition, flexible structure, excellent properties and wide range of applications. However, the exploration of complex quinary chalcogenides is still challenging. In this work, for the first time, we have developed the controlled synthesis of quinary Cu3NiInSnS6 nanocrystals, realizing the selective preparation of hexagonal wurtzite and cubic zinc blende metastable phases by simply tuning the sulfur source. The phase structure analysis reveals that both metastable phases possess a disordered structure with a random distribution of metal atoms in the unit cells. The fabricated wurtzite and zinc blende-structure Cu3NiInSnS6 nanocrystals have a direct band gap of 1.82 and 1.94 eV, respectively, and both exhibit superparamagnetic behavior at low temperatures. This work is of great significance for the development of novel multifunctional materials based on metastable multinary metal chalcogenide phases.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 19
·3308-3317
·
IF 2.909
Wu Meng,Li Qifei,Cheng Siling,Yao Kaitong,Liu Lin,Jiang Yu,Feng Yuezhan,Rui Xianhong,Yu Yan
Sodium-ion batteries (SIBs) are considered as potential substitute in large-scale energy storage systems due to the abundant natural resources and low price of sodium, and environmental friendliness. However, commercial graphite anode in lithium-ion batteries cannot be directly applied to SIBs. Bimetallic selenides stand out among the many anode materials owing to their rich redox chemistry and superior conductivities. Here, a bimetallic selenide Cu 3 VSe 4 is successfully prepared via one-pot reaction in oil phase, and its energy storage performance for SIBs is investigated. It delivers an impressive capacity, excellent rate performance (298 mAh g −1 at 10 A g −1 ), and outstanding long-term cycling life (305 mAh g −1 over 1000 cycles at 2.0 A g −1 ). In addition, the Na + storage mechanism (including intercalation and conversion reactions) is revealed. This work provides a new way for the application of the Cu 3 VSe 4 in SIBs. Graphical abstract A bimetallic selenide Cu 3 VSe 4 is successfully prepared via one-pot reaction in oil phase. When it is evaluated as the anode for sodium-ion batteries, the Cu 3 VSe 4 displays an impressive capacity, excellent rate performance, and outstanding long-term cycling life. In addition, the Na + storage mechanism (including intercalation and conversion reactions) is revealed.
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Nanoscale
·
2022
·Vol. 14
·期 32
·11731-11737
·
IF 8.307
Hao Cui,Zhan Su,Yu Ji,Tao Lan,Jian-Bin Zhang,Juan Ma,Liu Yang,Yu-Hui Chen,Hao-Ran Shen,Jiaqian Wang,Lihui Liu,Kun Cao,Wei Shen,Shufen Chen
Single-component healthy white light was achieved via Mn2+ post-doping into blue perovskite nanoplates (NPLs). The white light consists of two complementary colors, sky-blue (482 nm) and orange-red (610 nm), without harmful deep blue light (400–450 nm), which realizes the Commission Internationale de I′Eclairage (CIE) coordinates of (0.33, 0.33) (standard pure white light) and a color temperature of 6000 K. Benefitting from the lattice shrinking via Mn2+ doping, the stability of white NPLs toward long-term storage, UV light, heat, and polar solvents was greatly improved. Finally, a healthy and stable white light-emitting diode (WLED) was fabricated via down-conversion of a UV light LED with our white perovskite NPLs, and the WLED worked continuously for 240 minutes with a color drift of only (±0.006, ±0.004) and with a half lifetime (T50) of 212 minutes.
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高影响因子
Chemical Science
·
2022
·Vol. 13
·期 35
·10315-10326
·
IF 9.969
Jie Chen,Zelian Xu,Jingcheng Zheng,Haishan Wu,Yuwu Chi
Photoresponsive luminescent materials (PLMs) have attracted much attention in various optoelectronic fields, especially in optical data storage. Multi-wavelength (N-wavelength) based optical storage is a promising approach to increase the data storage density, but its current application is limited by the fact that most PLMs have only two-wavelength emissive states after certain light excitation, which requires simultaneous use of several PLMs and different irradiation light sources. In this study, we discovered that the wavelength of perovskite nanocrystals (PNCs) in the presence of dichloromethane (DCM) could be continuously and precisely tuned over a very wide color range (from red to violet) with the help of a single UV light source. The changes in crystal structures and optical properties of PNCs during UV irradiation were investigated in detail; the effects of capping ligand, solvent, UV irradiation power and time were evaluated, and the mechanism of UV triggered PNC fluorescence change was studied and is discussed. Finally, the applicability of PNCs/DCM film in N-wavelength-based high-density optical data storage was verified.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiaxing Fu,Jingyun Feng,Bori Shi,Yongfeng Zhou,Chang Xue,Mengying Zhang,Yabing Qi,Weijia Wen,Jinbo Wu
Ensuring the concealment and integrity of the loaded information during delivery remains a key challenge to cryptography. In this study, we synthesized CsPbBr 3 nanocrystals-polycarbonate composite films using the swelling-deswelling method, improved the stability and maintained the flexibility of the polymer. More importantly, we developed a novel patterning method using a nanosecond laser to engrave the composite selectively in three power grades: destroy the composite in high-power to present the patterns in bright field; damage the nanocrystals in medium-power to quench the fluorescence permanently; induce some defects to the nanocrystals in low-power to quench the fluorescence temporarily. A subsequent water immersion process allowed trace water penetration to passivate defects and recover the fluorescence locally to present the encrypted information. Our technology shows excellent performance by triple encryption level, convenient decryption (ultraviolet and water), low cost (2.8 × 10 - 3 USD/cm 2 ) and high precision (minimum patterning size down to 15 μm).
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危险品化学品经营许可证（带存储）