Article
Chemistry, Physical
Fang- Lai, Jui-Fu Yang, Wei-Chun Chen, Dan-Hua Hsieh, Woei-Tyng Lin, Yu-Chao Hsu, Shou-Yi Kuo
Summary: This study investigates the optical properties and carrier dynamics of n-type wurtzite InN with different surface dimensions using photoluminescence and time-resolved photoluminescence analysis. The morphology of InN can be controlled by growth temperature, leading to variations in carrier concentration and emission peak energies. The increase in carrier concentration in InN samples with 2D features is attributed to the presence of donor-like nitrogen vacancies, while the higher emission peak energies are explained by the recombination of Mahan excitons and localized holes in different dimensional structures.
Review
Chemistry, Multidisciplinary
Fabrizio Guzzetta, Cameron W. Jellett, Jalal Azadmanjiri, Pradip Kumar Roy, Saeed Ashtiani, Karel Friess, Zdenek Sofer
Summary: The attention in recent decades has been focused on the optoelectronic properties of indium and gallium chalcogenides, leading to advancements in fundamental and applied science. Group III-VI compounds have laminated structures that can be exfoliated to monolayers. Besides indium and gallium chalcogenides, there are other uncommon compounds in the family of group III-VI compounds, which have various crystal lattices, including layered structures. Aluminum chalcogenides show potential as anodes in batteries and semiconductors. Studies on thallium-based compounds are still exploring their semiconducting and thermoelectric properties. This review aims to summarize the significant features of these unusual materials and propose new studies to revive their potential in future technology.
Article
Chemistry, Physical
Fang Yao, Ruiming Li, Zhenglin Jia, Songxue Bai, Yujie Yang, Yanyan Li, Yalun Xu, Guojia Fang, Qianqian Lin
Summary: Chalcogenide-based semiconductors are highly promising for optoelectronic devices due to their low toxicity, cost-effectiveness, stability, and tunable properties. However, limited understanding of charge recombination mechanisms and trap states hinders their development. A comprehensive study on bismuth-based chalcogenide thin films was conducted to investigate the influence of post-treatments. The key findings were that post-treatment with Bi enhanced crystallinity and mobility but also increased carrier density, while post-treatment with sulfur increased carrier lifetime and mobility by passivating trap states.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jiayao Li, Tianyong Guan, Datao Tu, Wei Lian, Peng Zhang, Siyuan Han, Fei Wen, Xueyuan Chen
Summary: Highly efficient luminescent AgInTe2:Zn/ZnS nanocrystals with a maximum NIR-II quantum yield of 25.2% have been designed by manipulating the structure to reduce internal and surface defects. These nanoprobes were used for sensitive homogeneous biodetection of xanthine oxidase with a limit of detection as low as 25 nU L-1.
CHEMICAL COMMUNICATIONS
(2022)
Review
Chemistry, Physical
Tsukasa Torimoto, Tatsuya Kameyama, Taro Uematsu, Susumu Kuwabata
Summary: I-III-VI multinary semiconductors, with low toxicity, are being studied as potential quantum dot materials to replace toxic Cd and Pb-based binary semiconductors. The flexibility in design and control of electronic and optical properties of multinary quantum dots has attracted significant attention. This review provides a historical overview of the synthesis of I-III-VI quantum dots and discusses strategies for better control of their optoelectronic properties. Applications in luminescent devices and light energy conversion systems are also discussed, highlighting the potential for improved performance by controlling the size and composition of the quantum dots. Understanding the unique features of I-III-VI quantum dots will enable the development of novel applications utilizing their complexity.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS
(2023)
Article
Chemistry, Analytical
Yuecheng Zhang, Chengjia Li, Lingbo Sun, Jie Zhang, Xiaojun Yang, Hongyan Ma
Summary: A simple and sensitive ratiometric sensor based on the coordination between Cr(VI) and carbon dots (CDs) was developed for accurate detection of Cr(VI) concentration. The study demonstrated that the dual-amino groups play a critical role in the coordination mechanism, and the method showed promising results in real water sample analysis.
MICROCHEMICAL JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Ilia Litvinov, Anna Salova, Nikolay Aksenov, Elena Kornilova, Tatiana Belyaeva
Summary: In this study, the photophysical characteristics of core/shell InP/ZnS quantum dots (InP-QDs) were analyzed in cell culture medium, salt solutions, and directly in the cells. It was found that InP-QDs were internalized into endolysosomes in HeLa and A549 cells with similar dynamics to Cd-based QDs, but the two cell lines accumulated them differently. InP-QDs were reliably detected in the endosomes despite their low quantum yields. Factors such as cell culture medium, acidic pH, and salt solutions were found to affect the photoluminescence lifetime of InP-QDs. The scatter between endosomes in the same cell was observed, indicating the complex impact of these factors on the state of InP-QDs. The toxicity of InP-QDs for both cell lines at concentrations higher than 20 nM was demonstrated.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
B. Giroire, A. Garcia, S. Marre, T. Cardinal, C. Aymonier
Summary: A chemistry platform for the continuous synthesis of high-quality III-nitride quantum dots using supercritical solvents and short residence times was demonstrated. The GaN quantum dots produced exhibited strong UV photoluminescence and showed a continuous bandgap shift towards lower energies with increasing indium content. Additionally, an example of metal site substitution in the synthesis of InxGa1-xN solid solution was provided.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Optics
Konstantin A. Ivanov, Alexey M. Nadtochiy, Natalia V. Kryzhanovskaya, Sergey A. Mintairov, Nikolay A. Kalyuzhnyy, Ivan A. Melnichenko, Mikhail V. Maximov, Alexey E. Zhukov
Summary: The paper investigates the dynamic properties of InGaAs quantum well-dots (QWD) embedded in a GaAs matrix using time-resolved photoluminescence (TRPL) at temperatures ranging from 10 to 300 K. The experimental results confirm the theoretical calculations based on a two-level system model, indicating no need to consider the residual 2D quantum well. The absence of nonradiative recombination suggests a high-quality structure. Microscopic properties of the electron and hole states in QWDs are obtained for the first time, including a radiative lifetime of 700 ps and barriers of 50 and 150 meV for electrons and holes, respectively. The carrier capture time is found to be in the range of 10-30 ps.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Pardeep Kumar, Eduard Fron, Haruko Hosoi, Hikaru Kuramochi, Satoshi Takeuchi, Hideaki Mizuno, Tahei Tahara
Summary: LSSmOrange exhibits a large energy gap between absorption and emission due to excited-state proton transfer, and the bimodal ESPT dynamics is attributed to structural heterogeneity of the chromophore.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Analytical
Doheon Yoo, Eunyoung Bak, Hae Mee Ju, Yoo Min Shin, Min-Jae Choi
Summary: Indium phosphide colloidal quantum dots have attracted great interest as next-generation light-emitting materials due to their narrow emission spectra and environmentally-friendly components. Researchers have successfully passivated the surface defects of InP core using zinc complexes, resulting in improved photoluminescence quantum yield and reduced full-width at half-maximum.
Article
Chemistry, Applied
Yu P. Piryatinski, A. B. Verbitsky, A. Dmytruk, M. B. Malynovskyi, P. M. Lutsyk, A. G. Rozhin, O. D. Kachkovsky, Ya O. Prostota, V. V. Kurdyukov
Summary: This study investigated the nature and pathways of electronic excitation relaxation in a cationic pentamethine pyrylocyanine dye at low temperature. Through quantum-chemical calculations and time-resolved spectral measurements, the symmetric and non-symmetric structures in the ground and excited states were characterized, along with proposed energy diagram model for relaxation pathways. The study found that the transition between polymethine and polyene structures significantly impacts the electronic properties of the dye.
Article
Chemistry, Physical
Minji Son, Suhyeon Kim, Younki Lee, Jiwon Bang
Summary: Near infrared-emitting type-II In(Zn)P/ZnTe (core/shell) quantum dots have been developed with tunable emission range by adjusting core diameter and shell thickness. These heavy-metal-free, water-soluble quantum dots show potential for widespread applications in biomedicine and energy fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
O. Kulakovich, L. Gurinovich, Hui Li, A. Ramanenka, L. Trotsiuk, A. Muravitskaya, Jing Wei, Hongbo Li, N. Matveevskaya, D. Guzatov, S. Gaponenko
Summary: The study reports the impact of gold and silver plasmonic films on the photoluminescence and photostability of InP/ZnSe/ZnSeS/ZnS nanocrystals. Gold enhances photostability by reducing exciton lifetime, while silver reduces photostability without affecting photoluminescence intensity. Adjusting excitation wavelength and using a polyelectrolyte spacer can enhance luminescence intensity.
Article
Biochemistry & Molecular Biology
Anna Matiushkina, Ilia Litvinov, Anastasia Bazhenova, Tatiana Belyaeva, Aliaksei Dubavik, Andrei Veniaminov, Vladimir Maslov, Elena Kornilova, Anna Orlova
Summary: In this study, QD-SPION nanocomposites based on synthesized SPIONs and alloyed QDs were constructed, and their stability and cellular aggregate status were investigated. Component-wise analysis of the photoluminescence decay provided information about the localization of the composites inside cells.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Chemistry, Physical
Vanpaseuth Phouthavong, Ruixin Yan, Supinya Nijpanich, Takeshi Hagio, Ryoichi Ichino, Long Kong, Liang Li
Summary: This review comprehensively summarizes and discusses the synthesis methods of magnetic adsorbents for the removal of substances from water streams. The synthesis methods are categorized into five groups, and advancements have been made to make the process more energy efficient and simpler while maintaining or increasing the adsorption performance. Challenges such as enhancing the adsorption performance of materials and designing sophisticated material structures are also discussed.
Article
Nanoscience & Nanotechnology
Qun Wan, Lu Huang, Long Kong, Qinggang Zhang, Congyang Zhang, Mingming Liu, Xinrong Liao, Wenji Zhan, Weilin Zheng, Changwei Yuan, Mengda He, Liang Li
Summary: In the field of translucent displays, using an alkali metal/inert metal bilayer metal electrode and perovskite nanocrystals as an emitter layer allows for the fabrication of high-efficiency, high-color-purity, and high-brightness semitransparent LEDs, with great potential for applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Qinggang Zhang, Shiqiang Liu, Mengda He, Weilin Zheng, Qun Wan, Mingming Liu, Xinrong Liao, Wenji Zhan, Changwei Yuan, Jinyu Liu, Haijiao Xie, Xiaojun Guo, Long Kong, Liang Li
Summary: Efficient and stable lead-free Cs4SnBr6 perovskite was synthesized using SnF2 as tin source, leading to excellent optical properties and stability. This paves a new pathway for the development of high-performance light emitters using lead-free perovskite.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Nanoscience & Nanotechnology
Tran Thi Thu Huong, Nguyen Thu Loan, Thi Dieu Thuy Ung, Nguyen Thanh Tung, HyukSu Han, Nguyen Quang Liem
Summary: This paper presents the systematic synthesis of AgInS2 nanocrystals with different sizes by controlling the reaction temperature. The synthesis process involves the synthesis of Ag2S nanocrystals followed by the exchange of Ag+ with In3+ to form AgInS2 nanocrystals. GaS is then shelled on the AgInS2 core to form core/shell structures. The synthesized AgInS2/GaS nanocrystals exhibit clear excitonic absorptions and strong, narrow excitonic luminescence.
Article
Materials Science, Multidisciplinary
Tran Thi Thu Huong, Nguyen Thu Loan, Le Van Long, Tran Dinh Phong, Thuy Ung Thi Dieu, Nguyen Quang Liem
Summary: This article presents the high yield solvothermal syntheses of AgInS2 (AIS) core nanocrystals (NCs) and AIS/ZnS core/shell NCs that emit stably strong luminescence peaking around 665 nm. Increasing the thickness of the ZnS shell enhances the stability and luminescence of AIS/ZnS core/shell NCs. Time-resolved PL spectra show a longer emission delay in AIS/ZnS core/shell NCs.
Article
Chemistry, Physical
Hefei Sun, Qinggang Zhang, Takeshi Hagio, Ichino Ryoichi, Long Kong, Liang Li
Summary: In this study, a series of three-dimensional graphene-based materials (3D GBMs) with high specific surface area and abundant surface structures were synthesized. It was demonstrated that introducing N-containing or O-containing functional groups can significantly enhance the CO2 adsorption performance of 3D GBMs, and the simultaneous introduction of these two functional groups further increased the adsorption capacity of CO2. These materials have great potential in CO2 capture and storage.
SURFACES AND INTERFACES
(2022)
Article
Optics
Matteo L. Zaffalon, Francesca Cova, Mingming Liu, Alessia Cemmi, Ilaria Di Sarcina, Francesca Rossi, Francesco Carulli, Andrea Erroi, Carmelita Roda, Jacopo Perego, Angiolina Comotti, Mauro Fasoli, Francesco Meinardi, Liang Li, Anna Vedda, Sergio Brovelli
Summary: Radiation detection is crucial in various fields, and CsPbBr3 nanocrystals have shown exceptional radiation hardness under high doses of radiation. By fluorination treatment, the scintillation efficiency of CsPbBr3 has been significantly enhanced, while maintaining high radiation hardness.
Article
Chemistry, Multidisciplinary
Xunqiang Cheng, Mingming Liu, Qinggang Zhang, Mengda He, Xinrong Liao, Qun Wan, Wenji Zhan, Long Kong, Liang Li
Summary: The study found that doping zirconium into the ZnS layer can effectively enhance the photostability of InP/ZnSe/ZnS QDs and reduce photodegradation. Zirconium oxides can prevent the QDs from oxidation during light irradiation, maintaining a higher photoluminescence quantum yield.
Article
Chemistry, Physical
Qun Wan, Weilin Zheng, Chen Zou, Francesco Carulli, Congyang Zhang, Mingming Liu, Qinggang Zhang, Long Kong, Haili Song, Lih Y. Lin, Liang Li, Sergio Brovelli
Summary: Light-emitting diodes (LEDs) based on perovskite nanocrystals (PNCs) have attracted great attention for their high color purity, brightness, and luminous efficiency. However, the development of effective light outcoupling strategies to further enhance device performance is still a challenge.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Mengda He, Qinggang Zhang, Francesco Carulli, Andrea Erroi, Weiyu Wei, Long Kong, Changwei Yuan, Qun Wan, Mingming Liu, Xinrong Liao, Wenji Zhan, Lei Han, Xiaojun Guo, Sergio Brovelli, Liang Li
Summary: We have developed down-conversion ??-LED phosphors by growing CsPbBr3 perovskite nanocrystals directly inside sealed mesoporous silica nanospheres. The calcination process, in the presence of K2CO3, allows for the production of CsPbBr3 nanocrystals with high emission efficiency and isolation from the external environment. The resulting CsPbBr3-SiO2 nanospheres are highly stable, emissive, and dispersible, making them suitable for photolithographic inks for uniform ??-LED color conversion patterns with small pixels.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jianan Chen, Zhaobing Tang, Yangzhou Zhou, Shuo Ding, Liang Li, Lei Qian, Chaoyu Xiang
Summary: By adding glutamine (Gln) to the perovskite precursor, the quality of the FAPbI(3) film is significantly improved, resulting in enhanced film coverage and reduced grain trap states. As a result, NIR perovskite LEDs are achieved with a maximum external quantum efficiency (EQE) of 15% at 795 nm, which is four times higher than devices with pristine perovskite film.
Article
Chemistry, Physical
Francesco Carulli, Mengda He, Francesca Cova, Andrea Erroi, Liang Li, Sergio Brovelli
Summary: Multicomponent systems consisting of lead halide perovskite nanocrystals (CsPbX3-NCs, X = Br, I) grown inside mesoporous silica nanospheres (NSs) with selectively sealed pores combine intense scintillation and strong interaction with ionizing radiation of CsPbX3 NCs with the chemical robustness in aqueous environment of silica particles, offering potentially promising candidates for enhanced radiotherapy and radio-imaging strategies.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Changwei Yuan, Mengda He, Xinrong Liao, Mingming Liu, Qinggang Zhang, Qun Wan, Zan Qu, Long Kong, Liang Li
Summary: This study presents a versatile post-synthesis strategy to address surface and interface defects in core-shell quantum dots. By promoting halogen diffusion within the crystal structure at elevated temperatures, the strategy effectively repairs oxidation and reduces interface defects. The findings contribute to the advancement of semiconductor nanomaterials by providing fundamental insights into interface defect engineering.
Article
Chemistry, Multidisciplinary
Thi Quynh Xuan Le, Linh Nhat Nguyen, Thanh Tung Nguyen, Eun Ha Choi, Quang Liem Nguyen, Nagendra Kumar Kaushik, Nguyen Thuan Dao
Summary: This study investigated the effects of plasma treatment on the germination and growth of mung bean seeds and determined the optimal treatment parameters. The results showed that plasma treatment significantly enhanced germination and growth, and the mechanism behind the treatment effects was revealed through observations and measurements of the seed coating.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Qinggang Zhang, Mengda He, Qun Wan, Weilin Zheng, Mingming Liu, Congyang Zhang, Xinrong Liao, Wenji Zhan, Long Kong, Xiaojun Guo, Liang Li
Summary: By passivating the surface defects and constructing a core-shell structure of CsPbBr3 nanocrystals, the thermal quenching behavior of light emission is effectively suppressed, leading to improved stability of emission intensity. Based on these thermally stable nanocrystals, temperature-stable white LED devices are achieved.
