keyword
https://read.qxmd.com/read/38516960/phenanthroline-derived-n-doped-carbon-dots-as-robust-metal-free-photocatalysts-for-pet-raft-polymerization-and-polymerization-induced-self-assembly
#21
JOURNAL ARTICLE
Yang Xiao, Zhinan Xia, Wanchao Hu, Bei Liu, Changli Lü
Metal-free organic photocatalysts for photo-mediated reversible deactivation radical polymerization (photo-RDRP) are witnessed to make increasing advancement in the precise synthesis of polymers. However, challenges still exist in the development of high-efficiency and environmentally sustainable carbon dots (CDs)-based organocatalysts. Herein, N-doped CDs derived from phenanthroline derivative (Aphen) are prepared as metal-free photocatalysts for photoinduced electron transfer reversible addition-fragmentation chain transfer (PET-RAFT) polymerization...
March 22, 2024: Small
https://read.qxmd.com/read/38516074/triplet-energy-transfer-from-quantum-dots-increases-ln-iii-photoluminescence-enabling-excitation-at-visible-wavelengths
#22
JOURNAL ARTICLE
Tingting Huang, Sheng He, Anji Ni, Tianquan Lian, Ming Lee Tang
Europium(iii) complexes are promising for bioimaging because of their long-lived, narrow emission. The photoluminescence (PL) from europium(iii) complexes is usually low. Thus, the effective utilization of low-energy light >400 nm and enhancement of PL are long-standing goals. Here, we show for the first time that 1-naphthoic acid triplet transmitter ligands bound to CdS quantum dots (QDs) and europium(iii) complexes create an energy transfer cascade that takes advantage of the strong QD absorption. This is confirmed by transient absorption spectroscopy, which shows hole mediated triplet energy transfer from QDs to 1-NCA, followed by triplet transfer from 1-NCA to europium(iii) complexes with an efficiency of 65...
March 20, 2024: Chemical Science
https://read.qxmd.com/read/38513471/development-of-reusable-electrochemiluminescence-sensing-microchip-for-detection-of-vomitoxin
#23
JOURNAL ARTICLE
Huan Wang, Yue Jia, Tao Feng, Bing An, Hongmin Ma, Xiang Ren, Nuo Zhang, Faying Li, Qin Wei
In this work, a reusable DNA sensing microchip was developed for detection of vomitoxin (deoxynivalenol, DON) in sorghum using Cd-based core-shell CdSe@CdS quantum dots (QDs) as promising electrochemiluminescence (ECL) emitter. The size-adjustable aqueous phase CdSe@CdS QDs were prepared through homogeneous method, exhibiting strong cathodic ECL emission with a central wavelength of 520 nm in S2 O8 2- coreactant. And gold nanoparticles-modified iron cobalt cyanide hydrate (Fe-Co-Au) was introduced as an accelerator to amplify the ECL signal...
March 19, 2024: Talanta
https://read.qxmd.com/read/38512299/blinking-carbon-dots-as-a-super-resolution-imaging-probe
#24
JOURNAL ARTICLE
Jayanta Dolai, Prakash Joshi, Partha Pratim Mondal, Anupam Maity, Buddhadev Mukherjee, Nikhil R Jana
Single-molecule localization microscopy (SMLM) emerges as a powerful approach for super-resolution imaging that provides unprecedented resolution at the nanometer length scale. However, the development of appropriate probes with specific photophysical traits and characteristics is crucial for this approach. This study demonstrates two different fluorescent carbon dots (CDs) derived from the same molecular precursor─one emitting in red and the other in green─as a SMLM-based super-resolution imaging probe for different applications with an average localization precision of 20 nm and a resolution of 60 nm...
March 21, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38512109/a-portable-fluorescence-detection-device-based-on-a-smartphone-employing-carbon-nanodots-for-mn-2-sensing
#25
JOURNAL ARTICLE
Pijika Mool-Am-Kha, Samuch Phetduang, Kessarin Ngamdee, Chayada Surawanitkun, Xiang-Kui Ren, Wittaya Ngeontae
The measurement of fluorescence emission for quantitative analysis is typically based on a traditional spectrofluorometer, which limits an onsite detection approach. Thus, an alternative device should be developed for fulfilling this analysis outside of the laboratory. Therefore, a low-cost, portable, and low-energy consumption fluorescence reader-based smartphone device was developed. An ultraviolet light-emitting diodes (UV-LED) was used to construct the fluorescence device-based smartphone as a low-power excitation light source...
March 21, 2024: Analytical Methods: Advancing Methods and Applications
https://read.qxmd.com/read/38511553/synergistic-effects-of-amine-functional-groups-and-enriched-atomic-iron-sites-in-carbon-dots-for-industrial-current-density-co-2-electroreduction
#26
JOURNAL ARTICLE
Huazhang Guo, Jithu Raj, Zeming Wang, Tianyu Zhang, Kang Wang, Lili Lin, Weidong Hou, Jiye Zhang, Minghong Wu, Jingjie Wu, Liang Wang
Metal phthalocyanine molecules with Me-N4 centers have shown promise in electrocatalytic CO2 reduction (eCO2 R) for CO generation. However, iron phthalocyanine (FePc) is an exception, exhibiting negligible eCO2 R activity due to a higher CO2 to * COOH conversion barrier and stronger * CO binding energy. Here, amine functional groups onto atomic-Fe-rich carbon dots (Af-Fe-CDs) are introduced via a one-step solvothermal molecule fusion approach. Af-Fe-CDs feature well-defined Fe-N4 active sites and an impressive Fe loading (up to 8...
March 21, 2024: Small
https://read.qxmd.com/read/38510974/cyclodextrins-establishing-building-blocks-for-ai-driven-drug-design-by-determining-affinity-constants-in-silico
#27
JOURNAL ARTICLE
Amelia Anderson, Ángel Piñeiro, Rebeca García-Fandiño, Matthew S O'Connor
Cyclodextrins (CDs) are cyclic carbohydrate polymers that hold significant promise for drug delivery and industrial applications. Their effectiveness depends on their ability to encapsulate target molecules with strong affinity and specificity, but quantifying affinities in these systems accurately is challenging for a variety of reasons. Computational methods represent an exceptional complement to in vitro assays because they can be employed for existing and hypothetical molecules, providing high resolution structures in addition to a mechanistic, dynamic, kinetic, and thermodynamic characterization...
December 2024: Computational and Structural Biotechnology Journal
https://read.qxmd.com/read/38510558/optimizing-efficiency-of-a-custom-clinical-decision-support-tool-improves-adult-congenital-heart-disease-care
#28
JOURNAL ARTICLE
Catherine C Allen, Briana L Swanson, Xiao Zhang, Benjamin Schnapp, Sherri M Ruhland, Heather L Bartlett
STUDY OBJECTIVE: Improve the efficiency of an inpatient clinical decision support tool (CDS) for patients with adult congenital heart disease (ACHD). DESIGN: The efficiency of a CDS was evaluated across two time periods and compared. SETTING: An academic, tertiary care center. PARTICIPANTS: ACHD patients roomed in an inpatient setting. INTERVENTION: Plan-Do-Study-Act (PDSA) methods were applied starting in 2021 and included refinement of diagnostic codes and the addition of department encounter codes...
July 2023: American heart journal plus: cardiology research and practice
https://read.qxmd.com/read/38510458/comparison-of-long-term-outcomes-of-endoscopic-ultrasound-guided-hepaticogastrostomy-and-choledochoduodenostomy-for-distal-malignant-biliary-obstruction-a-multicenter-retrospective-study
#29
JOURNAL ARTICLE
Dongwook Oh, Sung Yong Han, Sang Hyub Lee, Seong-Hun Kim, Woo Hyun Paik, Hyung-Ku Chon, Tae Jun Song, Se Woo Park, Jae Hee Cho
BACKGROUND: Endoscopic ultrasound-guided biliary drainage (EUS-BD), classified as choledochoduodenostomy (CDS) and hepaticogastrostomy (HGS), is a feasible and effective alternative for distal malignant biliary obstruction (MBO) in failed endoscopic retrograde cholangiopancreatography. However, the preferred technique for better outcomes has not yet been evaluated. OBJECTIVES: We compared the long-term outcomes between the techniques. DESIGN: Retrospective comparative study...
2024: Therapeutic Advances in Gastroenterology
https://read.qxmd.com/read/38509636/back-interface-and-absorber-bulk-deep-level-trap-optimization-enables-highly-efficient-flexible-antimony-triselenide-solar-cell
#30
JOURNAL ARTICLE
Jia Yang, Mingdong Chen, Guojie Chen, Yanqing Hou, Zhenghua Su, Shuo Chen, Jun Zhao, Guangxing Liang
The unique 1D crystal structure of Antimony Triselenide (Sb2 Se3 ) offers notable potential for use in flexible, lightweight devices due to its excellent bending characteristics. However, fabricating high-efficiency flexible Sb2 Se3 solar cells is challenging, primarily due to the suboptimal contact interface between the embedded Sb2 Se3 layer and the molybdenum back-contact, compounded by complex intrinsic defects. This study introduces a novel Molybdenum Trioxide (MoO3 ) interlayer to address the back contact interface issues in flexible Sb2 Se3 devices...
March 20, 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://read.qxmd.com/read/38508131/tris-assisted-one-step-fabrication-of-functional-carbon-dots-for-specific-folate-receptor-positive-expressed-cancer-cell-imaging
#31
JOURNAL ARTICLE
Lili Tong, Xiuxiu Wang, Xue Zhang, Chang Xu, Meng Qiao, Zhenzhen Chen, Bo Tang
Specific staining of cancer cells is momentous for cancer research. Nanoprobe with multivalent recognition is emerging as powerful tools for bioimaging, but the nonspecific cell uptake and complex functional modification procedures are still obstacles for specific detection and convenient synthesis. Carbon dots (CDs) with an intrinsic targeting ability, excellent optical properties and biocompatibility acquired from an efficient one-step fabrication procedure were urgently desired in specific cancer cells visualization...
March 15, 2024: Talanta
https://read.qxmd.com/read/38508123/heteroatoms-doped-carbon-dots-as-dual-probes-for-heavy-metal-detection
#32
JOURNAL ARTICLE
Faisal K Algethami, Hani Nasser Abdelhamid
The utilization of l-cysteine in hydrothermal synthesis allows for the manufacture of carbon dots (CDs) that are doped with heteroatoms including oxygen, nitrogen, and sulfur (N, S, O-doped CDs). CDs have a particle size ranging from 1 to 3 nm, with an average particle size of 2.5 nm. N, S, and O-doped CDs display a blue fluorescence emission at a wavelength of 425 nm. It shows a reliance on the specific excitation wavelength between 320 and 500 nm. It has a selective quenching effect specifically with copper (Cu2+ ) ions when exposed to interactions with heavy metal ions, as compared to other metal ions...
March 19, 2024: Talanta
https://read.qxmd.com/read/38507618/clinical-decision-support-to-improve-cbc-and-differential-ordering
#33
JOURNAL ARTICLE
Grace K Mahowald, Kent B Lewandrowski, Anand S Dighe
OBJECTIVES: Complete blood count and differential (CBC diff) is a common laboratory test that may be overused or misordered, particularly in an inpatient setting. We assessed the ability of a clinical decision support (CDS) alert to decrease unnecessary orders for CBC diff and analyzed its impact in the laboratory. METHODS: We designed 3 CDS alerts to provide guidance to providers ordering CBC diff on inpatients at frequencies of daily, greater than once daily, or as needed...
March 20, 2024: American Journal of Clinical Pathology
https://read.qxmd.com/read/38507127/one-pot-synthesis-of-high-performance-green-emitting-carbon-dots-for-cd-2-sensing-and-anti-counterfeiting-applications
#34
JOURNAL ARTICLE
Shihua Liao, Jiamei Xiang, Shaogui Wu
This study presents a facile one-pot solvothermal synthesis of high-performance green fluorescent carbon dots (G-CDs) using o-phenylenediamine and ethylenediamine as precursors. The G-CDs show excellent optical, temporal, and chemical stability. Notably, they exhibit the highest quantum yield of 24.2% in ethanol and a strong green emission peaking at 546 nm under 440-490 nm excitation. In addition, G-CDs have outstanding salt resistance and multi-solvent compatibility. Due to its bright photoluminescence, G-CDs can be used as a secure ink for anti-counterfeiting...
March 20, 2024: Journal of Fluorescence
https://read.qxmd.com/read/38507091/timing-of-planned-cesarean-delivery-among-patients-with-two-previous-cesarean-sections
#35
JOURNAL ARTICLE
Noa Leybovitz-Haleluya, Alla Saban, Adi Yariv, Reli Hershkovitz
OBJECTIVES: The timing of planned repeat cesarean delivery (CD) is debateful in clinical practice. Planned repeat CD is typically scheduled before the spontaneous onset of labor to minimize the risk of uterine rupture during labor and the associated risk for fetal compromise. This timing should be balanced with the potential risk of delivering an infant who could benefit from additional maturation in utero. We aim to study the influence of gestational age at the time of repeat CD on maternal and fetal complications...
March 20, 2024: Archives of Gynecology and Obstetrics
https://read.qxmd.com/read/38506447/interaction-of-cyclodextrins-with-amphiphilic-alternating-cooligomers-possessing-the-dense-triazole-backbone
#36
JOURNAL ARTICLE
Tomoaki Yamamoto, Ryoichi Taguchi, Zijun Yan, Ryo Ejima, Linlin Xu, Masaki Nakahata, Yuri Kamon, Akihito Hashidzume
The interaction of cyclodextrins (CDs) with structure-controlled polymers is expected to provide significant insights into macromolecular recognition. However, the interaction of CDs with structure-controlled polymers has been an underexamined issue of investigation. Herein, alternating amphiphilic cooligomers (oligoC n AH, where n denotes the carbon number of alkyl groups; n = 4, 8, and 12) were synthesized by copper(I)-catalyzed azide-alkyne cycloaddition polymerization of heterodimers of 4-azido-5-hexynoic acid (AH) derivatives carrying N -alkylamide and t -butyl (tBu) ester side chains, followed by hydrolysis of the tBu ester, to study the interaction of CDs with oligoC n AH by 1 H NMR, nuclear Overhauser effect spectroscopy, and pulse-field-gradient spin-echo NMR...
March 20, 2024: Langmuir: the ACS Journal of Surfaces and Colloids
https://read.qxmd.com/read/38505942/nitrogen-doped-biomass-derived-carbon-dots-for-fluorescence-determination-of-sunset-yellow
#37
JOURNAL ARTICLE
Qian Zhang, Xiaoqi Wang, Lili Yuan, Lina Yu, Congying Shao, Hongxing Jia, Shun Lu
Sunset Yellow (SY) is a widely used food coloring in the food industry. However, exceeding the allowable limit of this dye poses a significant threat to human health. To address this issue, we developed Lycium ruthenicum -derived nitrogen-doped carbon dots (N-CDs) with a stable blue fluorescence through hydrothermal treatment for SY determination. The quantum yield (QY) of these N-CDs was found to be up to 10.63%. Physical characterization of N-CDs was performed using various spectroscopic techniques to confirm their excellent photostability and non-toxic properties...
March 20, 2024: Analytical Methods: Advancing Methods and Applications
https://read.qxmd.com/read/38503068/high-enrichment-and-sensitive-measurement-of-oxytetracycline-in-tea-drinks-by-thermosensitive-magnetic-molecular-imprinting-based-magnetic-solid-phase-extraction-coupled-with-boron-doped-carbon-dots
#38
JOURNAL ARTICLE
Zhi Li, Shuangying Li, Liushan Jiang, Jingwen Niu, Yue Zhang, Linchun Nie, Qingxiang Zhou, Chunmao Chen
As a typical kind of new pollutants, there are still some challenges in the rapid detection of antibiotics. In this work, a sensitive fluorescent probe based on boron-doped carbon dots (B-CDs) in combination with thermo-responsive magnetic molecularly imprinted polymers (T-MMIPs) was constructed for the detection of oxytetracycline (OTC) in tea drinks. T-MMIPs were designed, fabricated and employed to enrich OTC at trace level from tea drinks, and B-CDs were utilized as the fluorescent probe to detect the concentration of OTC...
March 13, 2024: Food Chemistry
https://read.qxmd.com/read/38502954/synergistic-reduction-of-nitrophenols-by-au-cds-nanoconjugates-with-nabh4
#39
JOURNAL ARTICLE
Eepsita Priyadarshini, Mohd Minzar, Saurabh Pandey, Kamla Rawat
Developing sustainable and innovative approaches for the efficient reduction of nitrophenols is crucial for environmental remediation, for managing health concerns posed by their widespread presence as hazardous pollutants in industrial effluents and contaminated water. We report the use of 12.9 ± 1 nm (TEM data) sized gold carbon dot nanoconjugates (Au@CDs) for catalytic conversion of o, m, p-nitrophenols to aminophenols by sodium borohydride. A simple approach was followed to synthesize ultra-small and highly stable Au@CDs, using citric acid and PEG as reducing and stabilizing agents...
March 19, 2024: Nanotechnology
https://read.qxmd.com/read/38501606/distance-based-paper-analytical-device-for-multiplexed-quantification-of-cytokine-biomarkers-using-carbon-dots-integrated-with-molecularly-imprinted-polymer
#40
JOURNAL ARTICLE
Kawin Khachornsakkul, Ruben Del-Rio-Ruiz, Lita Chheang, Wenxin Zeng, Sameer Sonkusale
This article introduces distance-based paper analytical devices (dPADs) integrated with molecularly imprinted polymers (MIPs) and carbon dots (CDs) for simultaneous quantification of cytokine biomarkers, namely C-reactive protein (CRP), tumor necrosis factor-alpha (TNF-α), and interleukin-6 (IL-6) in human biological samples for diagnosis of cytokine syndrome. Using fluorescent CDs and MIP technology, the dPAD exhibits high selectivity and sensitivity. Detection is based on fluorescence quenching of CDs achieved through the interaction of the target analytes with the MIP layer on the paper substrate...
March 19, 2024: Lab on a Chip
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