Article
Chemistry, Multidisciplinary
Daryl Darwan, Li Jun Lim, Tian Wang, Hadhi Wijaya, Zhi-Kuang Tan
Summary: A method of preparing highly luminescent visible-light-emitting quantum dots using a low-temperature nanocluster synthesis approach has been developed. The strong confinement effects in the few-atom-wide nanoclusters are responsible for the significant spectral shift from the near-infrared to the visible region, suggesting broader-than-expected optical tuning may be achievable in other quantum-confined semiconductor systems.
Article
Chemistry, Physical
Zhen Wu, Yuanyuan Zhang, Rongrong Hu, Meizhen Jiang, Pan Liang, Qing Yang, Li Deng, Tianqing Jia, Zhenrong Sun, Donghai Feng
Summary: The electron spin dynamics in CdSe quantum dots with hole acceptors were investigated using time-resolved ellipticity spectroscopy. Two types of hole acceptors, Li[Et3BH] and 1-octanethiol, resulted in distinctly different electron spin dynamics. Differences were observed in electron g factors, spin dephasing/relaxation times, and mechanisms.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Arun Ashokan, Paul Mulvaney
Summary: Solution-phase spectroelectrochemistry was used to study electron injection into colloidal CdSe quantum dots in THF. The results showed reversible optical changes on a time-scale of minutes, with the injection of electrons leading to quenching of photoluminescence. The number of electrons injected into the QDs depended on the electrode potential and QD size, with most injection occurring below the band edge.
CHEMISTRY OF MATERIALS
(2021)
Review
Polymer Science
Ranjana Choudhary Ahirwar, Swati Mehra, Sanjeev Machindra Reddy, Hassan Abbas Alshamsi, Aseel A. A. Kadhem, Smita Badur Karmankar, Alka Sharma, Poushali
Summary: The extraordinary fluorescence capabilities, excellent photophysical qualities, and long-term colloidal stability of quantum dots (QDs) have been the focus of attention in recent years. The addition of polymeric materials enhances the effectiveness of QDs, and QDs/polymer hybrids have significant applications in sensors, photonics, transistors, pharmaceutical transport, and other domains.
Article
Chemistry, Multidisciplinary
Cara E. Bradsher, Cayla D. Ontko, Alexandra C. Koziel, James R. McBride, Sandra J. Rosenthal
Summary: This research has found that ferroelectric behavior can be achieved in nanoparticles through ion exchange, with fluorescence retention achieved through CdS shelling before ion exchange, containing defects in the CdS shell rather than the fluorescent CdSe cores. The ferroelectric response remains constant with an increase in the number of CdS monolayers, while fluorescence retention also increases, reaching 99% at 8 monolayers, allowing for the addition of ferroelectric applications to the growing list of quantum dot applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Analytical
Hongliang Wang, Dan Song, Yue Zhou, Jiayuan Liu, Anna Zhu, Feng Long
Summary: The significant fluorescence enhancement of CdSe/ZnS quantum dots induced by Hg2+ was observed for the first time using a CdSe/ZnS QD-modified fiber nanoprobe. The fluorescence enhancement mechanism was attributed to Zn-to-Hg cation exchange in the ZnS shell, forming a HgxZn1-xS/CdSe heterojunction. The maximum fluorescence intensity increased over eight times and the characteristic time was linearly dependent on Hg2+ concentration.
Article
Chemistry, Multidisciplinary
Yossef E. Panfil, Jiabin Cui, Somnath Koley, Uri Banin
Summary: Colloidal quantum dots (CQDs) are essential components in modern optoelectronic devices. Recent development of coupled colloidal quantum dots molecules (CQDM) allows investigation of the interaction between charge carriers in different CQDs. Experimental and computational study reveals the complex emission spectra and coupled behavior in CQDM, which is significant for quantum technology and sensing applications based on CQDM.
Review
Optics
Jian Zhang, Shaohui Zhang, Yule Zhang, Omar A. Al-Hartomy, Swelm Wageh, Abdullah G. Al-Sehemi, Yabin Hao, Lingfeng Gao, Hao Wang, Han Zhang
Summary: This review provides a comprehensive evaluation of the optoelectronic application levels of semiconductor quantum dots (SQDs), perovskite quantum dots (PQDs), and carbon quantum dots (CDs), as well as a detailed summary of photocatalysis. The article discusses the compositions and optoelectronic properties of the three types of quantum dots, compares their strengths and weaknesses, demonstrates their flourishing development in various optoelectronic applications, and identifies bottlenecks and opportunities for future breakthroughs.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Jonghee Yang, Ashish Sharma, Jung Won Yoon, Watcharaphol Paritmongkol, Seungjin Lee, Hyungju Ahn, Wooseop Lee, Hochan Song, Woo Hyeon Jeong, Bo Ram Lee, Seo-Jin Ko, Mahshid Ahmadi, Edward H. H. Sargent, Hyosung Choi
Summary: Researchers have discovered that randomly-oriented, but closer-packed crystalline structures in bulk heterojunctions (BHJs) can significantly improve charge conduction and restrict diffusion-driven charge transfer process, allowing for ultrafast hole extraction from colloidal quantum dots (CQDs) to BHJs. This finding not only provides key principles to control the packing structures of organic hole transport layers (HTLs), but also opens up a new avenue to enhance optoelectronic performance.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tao Lv, Chunxia Tang, Yun Wu, Dan Zhang, Pengxiang Si
Summary: In this study, a stable colloidal CdS@ZnS QD-polyurethane composite material was successfully designed by fine-tuning the concentrations, achieving simultaneous enhancement of photoluminescence intensity and mechanical strength. The composite film demonstrated great potential for producing flexible, stretchable, and sustainable photovoltaic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Nkosingiphile Zikalala, Sundararajan Parani, Oluwatobi Samuel Oluwafemi
Summary: This study reported the synthesis of ZnInS (ZIS) quantum dots using thioglycolic acid and sodium citrate as dual capping agents, which showed selective quenching of fluorescence response to Co2+ ions. The findings suggest the potential of ZIS QDs in selective detection of Co2+ ions in aqueous solution.
Article
Chemistry, Analytical
Guiqiao Wang, Shurong Zhang, Jinzhi Cui, Wensu Gao, Xing Rong, Yaxin Lu, Canzhu Gao
Summary: A novel ionic sensor based on nitrogen-doped carbon quantum dots (N-CQDs) was developed for sensitive detection of hypochlorite ions and dichromate ions by fluorescence spectrometry. The sensor exhibited high fluorescence quantum yield, broad linear detection range, and good reliability in actual water sample analysis.
ANALYTICA CHIMICA ACTA
(2022)
Article
Optics
Debasmita Kandi, Sriram Mansingh, Arjun Behera, Kulamani Parida
Summary: In this study, it was found that among the colloidal CdS quantum dots prepared in four common solvents capped with thioglycolic acid (TGA), those in dimethyl sulfoxide (DMSO) exhibited the highest relative fluorescence quantum yield, reaching 93%. Additionally, Urbach energy was calculated to provide insight into the density of states in the CdS quantum dots.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Analytical
Xiangjuan Zheng, Zhiying Shi, Chaojun Fu, Yuanlin Ji, Baozhu Chi, Fanrong Ai, Xiluan Yan
Summary: Titanium carbide quantum dots (Ti3C2 QDs) were synthesized using ammonia-assisted hydrothermal method, and potassium permanganate (KMnO4)-functionalized Ti3C2 QDs (Mn-QDs) were obtained by modifying Ti3C2 nanosheets with KMnO4. The luminescent Mn-QDs showed good dispersion stability and were able to specifically detect Cr3+ and Hg2+ ions. The interaction between negatively charged Mn-QDs and Cr3+/Hg2+ was due to electrostatic interactions and surface functional groups. The detection limits for Cr3+ and Hg2+ were 0.80 μM and 0.16 μM, respectively.
Article
Chemistry, Inorganic & Nuclear
Venkatachalam Vijayaraj, Ganapathy Sasikala, Nanthagopal Manivannan, Narayanasamy Mathivanan, P. Karuppasamy, M. Senthil Pandian, P. Ramasamy
Summary: Water-soluble CdTe colloidal QDs with different emissions were synthesized using 3-MPA as a stabilizing agent and varying growth times. The red-shift in absorption and emission spectra indicated an increase in particle size. XRD and FTIR analysis confirmed the crystal structure and surface capping effect of the QDs. HRTEM and EDX analysis provided insights into the morphology and elemental composition of the QDs. The green emitting CdTe QDs showed excellent luminance and were found to be efficient fluorescent probes for fluorescence imaging of onion epidermal cells.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Nestan Shambetova, Yun Chen, Hao Xu, Li Li, Johan Solandt, Yuhua Zhou, Jingbo Wang, Haibin Su, Hjalmar Brismar, Ying Fu
JOURNAL OF PHYSICAL CHEMISTRY C
(2016)
Article
Nanoscience & Nanotechnology
Jacopo M. Fontana, Huijuan Yin, Yun Chen, Ricardo Florez, Hjalmar Brismar, Ying Fu
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2017)
Article
Cardiac & Cardiovascular Systems
Yun Chen, Frida Dangardt, Walter Osika, Krister Berggren, Eva Gronowitz, Peter Friberg
Article
Chemistry, Physical
Li Li, Yun Chen, Guangjun Tian, Victor Akpe, Hao Xu, Li-Ming Gan, Stanko Skrtic, Yi Luo, Hjalmar Brismar, Ying Fu
JOURNAL OF PHYSICAL CHEMISTRY C
(2014)
Article
Multidisciplinary Sciences
Frida Dangardt, Yun Chen, Krister Berggren, Walter Osika, Peter Friberg
Article
Multidisciplinary Sciences
Yun Chen, Matyas Molnar, Li Li, Peter Friberg, Li-Ming Gan, Hjalmar Brismar, Ying Fu
Article
Chemistry, Analytical
Ying Fu, Johnny Jussi, Qin Wang, Hjalmar Brismar, Yushen Liu, Xifeng Yang, Yun Chen
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Public, Environmental & Occupational Health
Maria Corell, Peter Friberg, Petra Lofstedt, Max Petzold, Yun Chen
Summary: This study found significant correlations between subjective health complaints (SHCs) and perceived stress among adolescents, with girls, adolescents from single-parent families, and those from less favorable socioeconomic conditions more likely to experience these issues. The correlation between self-reported stress and SHCs was stronger for psychological complaints than somatic complaints, and socioeconomic conditions of the family did not affect this correlation. Measures to improve adolescents' mental health should focus on reducing SHCs by addressing stressors in their daily lives and strengthening coping resources.
SCANDINAVIAN JOURNAL OF PUBLIC HEALTH
(2022)
Article
Public, Environmental & Occupational Health
Johan Dahlstrand, Peter Friberg, Jonatan Fridolfsson, Mats Borjesson, Daniel Arvidsson, Orjan Ekblom, Yun Chen
Summary: The study found that physical activity during leisure time is associated with less stress and fewer psychosomatic symptoms in adolescents, while physical activity during school time shows no significant association with stress. Additionally, adolescents who engage in more physical activity during leisure time are more likely to adopt coping strategies of shift-persist.
Article
Public, Environmental & Occupational Health
Yun Chen, Walter Osika, Goran Henriksson, Johan Dahlstrand, Peter Friberg
Summary: In this study, Swedish adolescents exposed to COVID-19 in 2020 showed no significant differences in mental health, relationships with parents and peers, and health behaviors compared to those not exposed to COVID-19.
SCANDINAVIAN JOURNAL OF PUBLIC HEALTH
(2022)
Article
Public, Environmental & Occupational Health
Maria Corell, Yun Chen, Peter Friberg, Max Petzold, Petra Lofstedt
Summary: The study found that the Family Affluence Scale (FAS) can mainly identify low- and high-income households in Sweden, and it may be used as an alternative measure of parental earned income in studies using self-reported socioeconomic status among adolescents.
Article
Psychology, Clinical
Katarina Laundy, Peter Friberg, Walter Osika, Yun Chen
Summary: The study showed that the TMR intervention had significant effects on mental health in schoolchildren, with impacts on anxiety and anger lasting for 2 years, and on resilience and disruptive behavior lasting for 6 months.
Article
Endocrinology & Metabolism
Yun Chen, Max Petzold, Ulrika Ruetschi, Johan Dahlstrand, Petra Lofstedt, Maria Corell, Peter Friberg
Summary: This study explores the associations between self-perceived stress, hair cortisol, and cortisone with cardiometabolic risk markers in adolescents. The findings suggest a link between chronic stress and overweight/obesity in adolescents, and hair cortisol and self-perceived stress capture different aspects of this relationship.
PSYCHONEUROENDOCRINOLOGY
(2022)
Article
Cardiac & Cardiovascular Systems
Yun Chen, Walter Osika, Frida Dangardt, Peter Friberg
Article
Nutrition & Dietetics
Frida Dangardt, Yun Chen, Eva Gronowitz, Jovanna Dahlgren, Peter Friberg, Birgitta Strandvik
JOURNAL OF NUTRITION AND METABOLISM
(2012)
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
