OPTICAL MATERIALS
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2022
·
IF 3.754
Qiqi Zhang,Zhifang Shi,Qixi Mi
Doping Mn 2+ brings in new energy levels to a variety of II-VI family and perovskite semiconductors. Although the Mn 2+ luminescence in most cases appears yellow to orange, photoexcitation of the tin-based perovskite material CsSn 0.9 Mn 0.1 Cl 3 (CTMC) leads to an unusual red emission at 647 nm. Characterizations using time-resolved photoluminescence (PL) and electron paramagnetic resonance (EPR) indicate that most of the Mn 2+ contents in CTMC are clustered like trimer chloromanganates, which accept photoexcitation energy from the perovskite matrix and acts as emission centers. These results are in sharp contrast from Mn 2+ -doped CsCaCl 3 or CsPbCl 3 , where individual Mn 2+ centers dominate the PL and EPR spectra . Our results provide a new approach to broadening the color range of Mn 2+ emission in perovskite semiconductors.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 27
·12801-12810
·
IF 3.553
Cao Sheng,Dai Chencheng,Yao Shangfei,Zou Bingsuo,Zhao Jialong
In recent years, light-emitting Mn 2+ -doped nanocrystals (NCs) have been widely studied because of their strong and stable Mn 2+ d–d emission. Herein, highly efficient colloidal Mn 2+ -doped Cd–In–S NCs were prepared by a hot injection strategy. The as-prepared NCs have a cubic crystal structure of CdS host and exhibit strong Mn 2+ emission. The photoluminescence (PL) intensity, PL position, and PL lifetime of this Mn 2+ emission can be adjusted by changing the doping level of Mn 2+ . In particular, by tuning the amount of dopant, the emission color can be varied in the range of 601 nm to 643 nm, which is due to the coordination field environment of Mn 2+ ions changed by the doping concentration. The PL intensity of Mn 2+ is significantly enhanced by the ZnS shell coating, and the highest PL quantum yield can reach 56%, which is attributed to the removal of NCs surface-related defects by shell modification. A prototype LED was fabricated as well by using the as-prepared highly efficient Mn 2+ -doped Cd–In–S NCs as a color conversion material. The Mn 2+ -doped multicomponent semiconductor NCs reported here extend the availability of classical Mn 2+ -doped luminescent materials and provide alternatives for other applications requiring orange-red colloidal NCs.
研究领域:
材料科学
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光学
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纳米技术
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DOI
高影响因子
Colloid and Interface Science Communications
·
2025
·
IF 4.7
Shouguang Wang,Xiaofei Zhang,Dunmin Zhuang,Lina Dong,Bo Li
Objective Breast cancer remains a global health challenge due to limitations of conventional therapies, such as drug resistance and systemic toxicity. This study aimed to develop a novel synergistic chemo-immunotherapy platform by constructing Mn 2+ -coordinated oxidized hyaluronic acid (OHA)-based nanoparticles co-loaded with phloretin (PHL) (OHA@Lys/PHL Mn 2+ ). Methods A nanosystem was engineered using oxidized hyaluronic acid (OHA) modified with lysine (Lys) to co-encapsulate PHL and Mn 2+ ions. The anti-tumor efficacy was evaluated in vitro (4 T-1 breast cancer cells) and in vivo (4 T-1 tumor-bearing mice), including assessments of proliferation inhibition, apoptosis induction, reactive oxygen species (ROS) accumulation, DNA damage, cGAS-STING pathway activation, and dendritic cell (DC) maturation. Combination therapy with cisplatin (CDDP) was also investigated. Results OHA@Lys/PHL Mn 2+ achieved 80.3 % cell viability inhibition on 4 T-1 cells. Combined with CDDP, it further suppressed proliferation, induced apoptosis, and enhanced ROS accumulation. Mechanistically, the nanosystem induced DNA double-strand damage and activated the cGAS-STING pathway. In vivo , OHA@Lys/PHL Mn 2+ monotherapy showed significant tumor inhibition (46.4 %, p < 0.001). Combination with CDDP achieved near-complete tumor suppression (86.7 % inhibition) and reduced lung metastasis. The in vivo mechanism results indicated that nanosystem triggered DNA damage, activated cGAS-STING signaling, and significantly promoted DC maturation (48.5 % vs. 28.2 % in controls). Conclusion This strategy offers a promising and clinically translatable approach for advanced breast cancer treatment.
研究领域:
纳米医学
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肿瘤学
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药学
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免疫治疗
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药物递送系统
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生物化学
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分子生物学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.6
Dejian Hou,Jianhong Dong,Rui Huang,Huihong Lin,Shaomin Lin,Yi Zhang,Zhenxu Lin,Huan Yang,Hailong Liu,Jinyan Li
Multiple-emission phosphors, which can be engineered via co-doping strategies and energy transfer regulation, have become a research hotspot in recent years. In this research, Mn 2+ and Cr 3+ doped Sr 2 MgAl 22 O 36 phosphors were prepared using a high-temperature solid-state reaction method. The green light emission of Mn 2+ and the deep-red emission of Cr 3+ were investigated, and the impacts of doping concentration and temperature were discussed in detail. Dual-band emission can be achieved for co-doped samples under blue light excitation, and the energy transfer from Mn 2+ to Cr 3+ was confirmed. Owing to the distinct temperature responses of Mn 2+ and Cr 3+ , optical temperature sensing properties were demonstrated for the co-doped sample, which may offer a feasible approach for non-contact temperature measurement. Moreover, a triple-emission phosphor-converted light-emitting diode (pc-LED) device was fabricated, highlighting the potential application of Sr 2 MgAl 22 O 36 :Mn 2+ ,Cr 3+ in plant growth.
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DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 12
·期 5
·2301796
·
IF 9
Zhiduo Wang,Yao Xiao,Bingjun Liu,Kang Chen,Peishan Shao,Zhicong Chen,Puxian Xiong,Jiulin Gan,Dongdan Chen
Multi-mode mechanoluminescence (ML) materials are have applications such as anti-counterfeiting, stress sensing, and information security. There is limited general consensuses on the luminescent mechanisms, even though exploring ML mechanism based on defects has shown significance in further studies exploring both ML materials design and application. Here, a deep-red to near-infrared (NIR) ML material is reported in a Mn 2+ -activated double perovskite-type compound (CaZnGe 2 O 6 : Mn 2+ ). The abundant lattice sites within the crystal structure have enabled Mn 2+ doping and defects. Two different photoluminescence (PL) emission bands peaked at 536 and 676 nm from 4 T 1 ( 4 G)→ 6 A 1 ( 6 S) are observed, which are attributed to the substitution of Zn 2+ and Ca 2+ sites by Mn 2+ , respectively. Hence, tunable emissions from green to red are realized in single Mn 2+ doping, which can be further regulated by varying the Mn 2+ concentration. Electrons and holes are captured by cation and anion defects ( V Zn ′ ′ $V_{{\mathrm{Zn}}}^{\prime \prime }$ and V Ca ′ ′ $V_{{\mathrm{Ca}}}^{\prime \prime }$ , V O • • $V_{\mathrm{O}}^{ \bullet \bullet }$ , vacancy of Zn, Ca and O ions), followed by the combination of such carriers to transfer energy to the Mn 2+ 3d states to produce ML/persistent luminescence (PersL) under mechanical/thermal stimuli. Proof-of-concept applications in multi-mode anti-counterfeiting, temperature sensing, and X-ray imaging fields are demonstrated. These results will deepen the understanding of single Mn 2+ -doped multi-stimulus-responsive ML materials, inspiring the development of more high-performance ML phosphors for practical applications.
研究领域:
材料科学
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光学材料
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发光材料
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智能响应材料
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固态物理
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DOI
高影响因子
Advanced Photonics Research
·
2023
·Vol. 4
·期 6
·2300106
·
IF 3.7
Yuqi Chen,Guixian Li,Yang Ding,Qinan Mao,Meijiao Liu,Chunhua Wang,Runtian Zheng,Bao-Lian Su,Jiasong Zhong
Luminescence thermometry plays significant roles in various fields including industrial production, environmental detection, aerospace, and medicine. However, its accuracy improvement remains highly challenging due to the thermal quenching effect of phosphors. Herein, for the first time, a thermal-activated electron compensation Mn 2+ - and Tb 3+ -codoped Ca 2 LaTaO 6 phosphor is developed for multiparametric temperature sensing with tunable emission of Mn 2+ and antithermal quenching emission of Tb 3+ , leading to excellent accuracy at high temperatures. By virtue of the deep electron trap states induced by Mn 2+ dopant, the electrons in the deep trap can be thermally activated at high temperatures, which can replenish the attenuated Tb 3+ emission caused by thermal quenching, thus bringing out the antithermal quenching phenomenon. On account of the prominent emission properties, the luminescence intensity ratio (LIR) readout and lifetime-based thermometry are designed, providing a maximum relative sensitivity S R of 3.603% and 1.941% K −1 , respectively. Multiparametric temperature sensing and novel data analysis are also employed to further improve the accuracy of the luminescence thermometer. The outstanding relative thermal sensitivity ranging from 8.72% to 16.11% K −1 and temperature uncertainty order of 10 −3 are achieved. These results demonstrate that the designed Ca 2 LaTaO 6 :Mn 2+ /Tb 3+ phosphor material is a promising thermal-sensing candidate.
研究领域:
材料科学
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光学传感器
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发光材料
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测温技术
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固态物理
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DOI
高影响因子
Materials Horizons
·
2023
·Vol. 10
·期 9
·3476-3487
·
IF 13.3
Yao Xiao,Puxian Xiong,Shuai Zhang,Yongsheng Sun,Na Yan,Zhiduo Wang,Qianyi Chen,Peishan Shao,Mikhail G. Brik,Shi Ye,Dongdan Chen,Zhongmin Yang
Mechanoluminescent (ML) materials have shown promising prospects for various applications, e.g. in stress sensing, information anti-counterfeiting and bio stress imaging fields. However, the development of trap-controlled ML materials is still limited, because the trap formation mechanism is not always clear. Here, inspired by a defect-induced Mn4+ → Mn2+ self-reduction process in suitable host crystal structures, a cation vacancy model is creatively proposed to determine the potential trap-controlled ML mechanism. Combined with the theoretical prediction and experimental results, both the self-reduction process and ML mechanism are clarified in detail, where the contribution of and defects dominates the ML luminescent process. Electrons/holes are mainly captured by the anionic/cationic defects, followed by the combination of electrons and holes to transfer energy to the Mn2+ 3d states under mechanical stimuli. Based on the multi-mode luminescent features excited by X-ray, 980 nm laser and 254 nm UV lamp, together with the excellent persistent luminescence and ML, a potential application in advanced anti-counterfeiting is demonstrated. These results will deepen the understanding of the defect-controlled ML mechanism, and inspire more defect-engineering strategies to develop more high-performance ML phosphors for practical application.
研究领域:
材料科学
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固态物理
·
光电子学
·
功能材料
·
应力传感
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2010
·Vol. 21
·期 1
·151-156
·
IF 4.795
Pengtao Shao,Qinghong Zhang,Yaogang Li,Hongzhi Wang
The aqueous synthesis of color-tunable and stable Mn2+-doped ZnSe quantum dots (Mn:ZnSe d-dots) via a nucleation-doping strategy was realized in a three-necked flask and the photoluminescence (PL) peak position was easily tuned from 572 nm to 602 nm by prolonging the epitaxial-growthg time. The chemical stability of the resulting d-dots is much better than that of CdTevia an aqueous synthesis. Separation of nucleation and growth of crystallization, and multiple-step-injection of both zinc precursor and 3-mercaptopropionic acid (MPA) stabilizing reagent, were employed to realize a balanced, mutually diffused interface and a pure ZnSe shell. The resulting nanocrystals show excellent optical properties, implying that nanocrystals with high quality could also be achieved via aqueous synthesis.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Feng Gao,Qing Pang,Dangli Gao,Chaoyang Jia,Hong Xin,Yong Pan,Yuhua Wang,Sining Yun
Photostimulable luminescence (PSL) nanophosphors, which exhibit superior features including controllable energy storage and efficient photon release upon light stimulation, are desirable for optical signal storage. However, trap tuning of the storage phosphor remains a great challenge. Herein, the PSL of Zn2GeO4:Mn2+ nanophosphors is enhanced via creating deep traps through nonequivalent Pr3+ doping. The possible enhanced mechanisms are analyzed combined with doping models using the first-principles theory. A mechanism is proposed based on changing the coordination environment of Mn2+, creating deep traps and tuning the band gap structure, and thus providing the chance for electrons’ photoionization and PSL generation. As a result, the prepared nanophosphors demonstrate the superior functionalities for optical signal storage. This work not only offers an insight into defect engineering through doping strategies for developing PSL materials but also supplies a good candidate for optical information storage.
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高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 1
·e202204013
·
IF 2.1
Yanrong Li,Haohao Li,Yang Xu
Graphical In this work, we proposed a kind of N-CDs which can specially respond to Mn 2+ with a minimum concentration of 5 nM. Notably, N-CDs-based visible warming of Mn 2+ over drinking water standard can be achieved. Manganese is one of vital elements related to various diseases. Nowadays, few works can specifically respond to Mn 2+ alone. Hence, it is still challenging for specific detection of Mn ion. In this work, nitrogen-doped carbon dots (N-CDs) with blue luminescence properties was prepared using nitrated pyrene and diethylenetriamine (DETA) via one-step solvothermal process. N-CDs were applied as a fluorescent probe for specific detection of Mn 2+ because of their high selectivity and sensitivity. No apparent fluorescence interferences can be observed with various amino acids and metal ions. The minimum concentration detected was 5 nM. The quenching mechanism maybe attributed to dynamic quenching processes. Notably, in this work, a visual early-warning of Mn content exceeding the standard in drinking water in the light of fluorescence quenching of N-CDs was achieved, and the practical sensing of N-CDs which performed in environmental water samples demonstrated the detection performance of N-CDs in real samples.
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DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-9
·
IF 5.7
Xia Qing,Zheng Jintao,Bu Jianlan,Li Rui,Li Xinxin,Fan Shuting,Ling Kai,Jiang Hongyan
The development and performance of a DNA probe adsorbing Mn 2+ -modified black phosphorus (BP@Mn 2+ /DNA) hybrid nanosensor is reported that enables rapid detection of cancer-derived exosomal microRNAs (miRNAs) and exosomes. This two-dimensional (2D) nanosensor can spontaneously penetrate the lipid bilayer of exosome membranes owing to its ultra-thin geometry. Subsequently, the adsorbed probe specifically hybridizes with the target miRNA and then dissociates from the nanosensor surface, generating fluorescent signals. Therefore, the BP@Mn 2+ /DNA nanosensor can differentiate between colorectal cancer (CRC) cell-derived exosomes and those derived from intestinal epithelial cells through sensing of exosomal miRNAs. Furthermore, when the epithelial cell adhesion molecule (EpCAM) aptamer is adsorbed onto BP@Mn 2+ instead of the miRNA probe, the nanosensor is able to distinguish exosomes derived from the plasma of CRC patients from those of healthy controls by the recognition ability of the EpCAM aptamer. By utilizing this nanosensor, we were able to effectively differentiate cancer-derived exosomes through the direct detection of miRNA-21 within the exosomes, as well as the identification of specific exosomal membrane proteins. This nanosensor design paves the way for the development of rapid and efficient cancer-derived exosomal miRNA and exosome biosensing nanoplatforms. Graphical abstract
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xianju Zhou,Shouchun Zhao,Jie Zhang,Guotao Xiang,Sha Jiang,Li Li,Yongjie Wang,Yanhong Li,Chuan Jing,Lu Yao,Hongmei Yang,Zhen Wang
As a new generation of luminous material , perovskite quantum dots (PQDs) possess many excellent properties. However, PQDs suffer from dramatic decrease of optical performance when affected by high temperature. In this paper, methamidine acetate (FA + ) and manganese divalent cation (Mn 2+ ) codoped CsPbCl 3 quantum dots (QDs) were synthesized. The introduced FA + and Mn 2+ were designed to substitute Cs + (A sites) and Pb 2+ (B sites), respectively. By comparison with CsPbCl 3 :Mn 2+ QDs, the results show that the CsPbCl 3 :FA + ,Mn 2+ QDs improve the blue exciton luminescence by 15% and the red Mn 2+ ions luminescence by 37%. Furthermore, CsPbCl 3 :FA + ,Mn 2+ QDs demonstrate super thermal stability by maintaining 97% of Mn 2+ emission when the temperature is raised to 70 °C even after 6 thermal cycles. Simultaneously, the UV light and water stability of CsPbCl 3 :FA + ,Mn 2+ QDs have also been obviously enhanced. The powder of the coped PQDs have been fabricated into a white LED which exhibits Color Rendering Index (CRI) of 88.2 and Correlated Color Temperature (CCT) of 5745 K. It shows that CsPbCl 3 :FA + ,Mn 2+ QDs not only reduce the Pb 2+ ions toxicity problem but also boost the thermal stability and thermal cyclability, which may open up more possibilities for the applications in optoelectronic devices.
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高影响因子
危险品化学品经营许可证（带存储）