keyword
https://read.qxmd.com/read/37729595/rejuvenating-aged-perovskite-quantum-dots-for-efficient-solar-cells
#21
JOURNAL ARTICLE
Jingxuan Chen, Donglin Jia, Rongshan Zhuang, Yong Hua, Xiaoliang Zhang
Perovskite quantum dot (PQD) emerges as one of the most promising candidates for next-generation solar cells owing to its remarkable optoelectronic properties and solution processability. However, the optoelectronic properties of PQDs suffer from severe degradation with the storage due to the dynamically binding ligands, predominantly affecting photovoltaic applications. Herein, an in-situ defect healing treatment is reported to effectively rejuvenate the aged PQDs. Systematically experimental studies and theoretical calculations are performed to fundamentally understand the causes leading to the recovered optoelectronic properties of aged PQDs...
September 20, 2023: Advanced Materials
https://read.qxmd.com/read/37625062/self-healing-of-trotter-error-in-digital-adiabatic-state-preparation
#22
JOURNAL ARTICLE
Lucas K Kovalsky, Fernando A Calderon-Vargas, Matthew D Grace, Alicia B Magann, James B Larsen, Andrew D Baczewski, Mohan Sarovar
Adiabatic time evolution can be used to prepare a complicated quantum many-body state from one that is easier to synthesize and Trotterization can be used to implement such an evolution digitally. The complex interplay between nonadiabaticity and digitization influences the infidelity of this process. We prove that the first-order Trotterization of a complete adiabatic evolution has a cumulative infidelity that scales as O(T^{-2}δt^{2}) instead of O(T^{2}δt^{2}) expected from general Trotter error bounds, where δt is the time step and T is the total time...
August 11, 2023: Physical Review Letters
https://read.qxmd.com/read/37605733/synergistic-and-long-lasting-wound-dressings-promote-multidrug-resistant-staphylococcus-aureus-infected-wound-healing
#23
JOURNAL ARTICLE
Xiangjie Fu, Yaqiong Ni, Guanchen Wang, Runda Nie, Yang Wang, Run Yao, Danyang Yan, Mingming Guo, Ning Li
BACKGROUND: Multidrug-resistant staphylococcus aureus infected wounds can lead to nonhealing, systemic infections, and even death. Although advanced dressings are effective in protecting, disinfecting, and maintaining moist microenvironments, they often have limitations such as single functionality, inadequate drug release, poor biosafety, or high rates of drug resistance. METHODS: Here, a novel wound dressing comprising glycyrrhizic acid (GA) and tryptophan-sorbitol carbon quantum dots (WS-CQDs) was developed, which exhibit synergistic and long-lasting antibacterial and anti-inflammatory effects...
2023: International Journal of Nanomedicine
https://read.qxmd.com/read/37599603/multifunctional-gold-silver-carbon-quantum-dots-nano-hybrid-composite-advancing-antibacterial-wound-healing-and-cell-proliferation
#24
JOURNAL ARTICLE
Ziqi Wang, Jiayi Zhu, Linlin Chen, Keqin Deng, Haowen Huang
The urgent need for innovative materials that effectively eliminate bacteria while promoting cell growth to accelerate wound healing has led to the exploration of new options, as current antimicrobial nanoparticles often exhibit high cytotoxicity, which hinders wound closure. In this study, a nano-hybrid composite, named gold-silver-carbon quantum dots (AuAg-CDs), was prepared by embedding gold and silver nanoclusters into carbon dots. The AuAg-CDs nano-hybrid composite demonstrates remarkable biocompatibility, displays potent antibacterial activity, and possesses a unique capability to promote cell proliferation...
August 21, 2023: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/37528109/high-efficiency-flexible-and-large-area-red-green-blue-all-inorganic-metal-halide-perovskite-quantum-wires-based-light-emitting-diodes
#25
JOURNAL ARTICLE
Yang Bryan Cao, Daquan Zhang, Qianpeng Zhang, Xiao Qiu, Yu Zhou, Swapnadeep Poddar, Yu Fu, Yudong Zhu, Jin-Feng Liao, Lei Shu, Beitao Ren, Yucheng Ding, Bing Han, Zhubing He, Dai-Bin Kuang, Kefan Wang, Haibo Zeng, Zhiyong Fan
Metal halide perovskites have shown great promise as a potential candidate for next-generation solid state lighting and display technologies. However, a generic organic ligand-free and antisolvent-free solution method to fabricate highly efficient full-color perovskite light-emitting diodes has not been realized. Herein, by utilizing porous alumina membranes with ultra-small pore size as templates, we have successfully fabricated crystalline all-inorganic perovskite quantum wire arrays with ultrahigh density and excellent uniformity, using a generic organic ligand-free and anti-solvent-free solution method...
August 1, 2023: Nature Communications
https://read.qxmd.com/read/37521436/multidrug-resistant-pathogens-in-burn-wound-prevention-diagnosis-and-therapeutic-approaches-conventional-antimicrobials-and-nanoparticles
#26
REVIEW
Jaber Hemmati, Mehdi Azizi, Babak Asghari, Mohammad Reza Arabestani
Multidrug-resistant pathogens are one of the common causes of death in burn patients and have a high risk of nosocomial infections, especially pneumonia, urinary tract infections, and cellulitis. The role of prolonged hospitalization and empirical antibiotics administration in developing multidrug-resistant pathogens is undeniable. In the early days of admitting burn patients, Gram-positive bacteria were the dominant isolates with a more sensitive antibiotic pattern. However, the emergence of Gram-negative bacteria that are more resistant later occurs...
2023: Canadian Journal of Infectious Diseases & Medical Microbiology
https://read.qxmd.com/read/37463367/ornidazol-based-application-sorbent-with-nano-silica-and-its-antimicrobial-activity
#27
JOURNAL ARTICLE
Olga Bilyayeva, Ivan Karol, Eugeniy Demianenko, Alina Gaidai, Yevhenii Kryzhevskyi, Polina Vakuliuk, Alexander Golub
OBJECTIVE: The aim: To investigate the effect of application sorbent based on ornidazole with nanosilicon in experiment and clinic. PATIENTS AND METHODS: Materials and methods: In order to study the effectiveness of the Ornidasil application sorbent for the treatment of purulent wounds, we conducted an experimental study in rats. Also, we studied the effectiveness of the Ornidasil in the clinic for the treatment of patients with diabetic foot syndrome and to prevent the suppuration of postoperative wounds in patients with purulent peritonitis in toxic and terminal stages...
2023: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://read.qxmd.com/read/37461093/the-addition-of-an-ultra-small-amount-of-black-phosphorous-quantum-dots-endow-self-healing-polyurethane-with-a-biomimetic-intelligent-response
#28
JOURNAL ARTICLE
Jia-Hui Zhong, Yan Zhou, Xin-Xin Tian, Ying-Lu Sun, Bi-Ru Shi, Zhen-Yu Zhang, Wen-Hua Zhang, Xiang-Dong Liu, Yu-Ming Yang
This study explores new applications of black phosphorus quantum dots by adding them to self-healing material systems for the first time. Self-healing polyurethane with an ultra-small amount of black phosphorus quantum dots has biomimetic intelligent responsiveness and achieves balance between its mechanical and self-healing properties. By adding 0.0001 wt% black phosphorus quantum dots to self-healing polyurethane, the fracture strength of the material increases from 3.0 to 12.3 MPa, and the elongation at break also increases from 750 to 860%...
July 17, 2023: Macromolecular Rapid Communications
https://read.qxmd.com/read/37425626/insulin-cobalt-core-shell-nanoparticles-for-receptor-targeted-bioimaging-and-diabetic-wound-healing
#29
JOURNAL ARTICLE
Deepinder Sharda, Diptiman Choudhury
Diabetic wounds represent a major issue in medical care and need advanced therapeutic and tissue imaging systems for better management. The utilization of nano-formulations involving proteins like insulin and metal ions plays significant roles in controlling wound outcomes by decreasing inflammation or reducing microbial load. This work reports the easy one-pot synthesis of extremely stable, biocompatible, and highly fluorescent insulin-cobalt core-shell nanoparticles (ICoNPs) with enhanced quantum yield for their highly specific receptor-targeted bioimaging and normal and diabetic wound healing in vitro (HEKa cell line)...
June 29, 2023: RSC Advances
https://read.qxmd.com/read/37386880/solar-assisted-self-healing-n-doped-mxene-quantum-dots-based-membrane-with-protein-resistance-for-seawater-desalination
#30
JOURNAL ARTICLE
Tao Zhang, Chuan-Shuai Dong, Li-Zhi Zhang
Membrane-based air humidification-dehumidification desalination (MHDD) technology is an effective way to ease fresh water shortage owing to its excellent salt rejection. However, industrial applications pose higher requirements on membrane life expectancy. Membrane cleaning is considered as a potentially sustainable approach to prolong the operation time. Traditional cleaning methods are limited due to the poor recovery efficiency and the introduction of impurities. Here, a novel solar-assisted-self-healing N-doped MXene quantum dots (NMQDs)/ZnO-based membrane was fabricated to repair the water production capability of membranes contaminated by proteins from seawater...
June 29, 2023: Environmental Science & Technology
https://read.qxmd.com/read/37366546/multifaceted-carbon-dots-toward-ph-responsive-delivery-of-5-fluorouracil-for-in-vitro-antiproliferative-activity
#31
JOURNAL ARTICLE
Navpreet Kaur, Pranav Tiwari, Pawan Kumar, Mainak Biswas, Avinash Sonawane, Shaikh M Mobin
The synthesis of smart hybrid material to assimilate diagnosis and treatment is crucial in nanomedicine. Herein, we present a simple and facile method to synthesize multitalented blue-emissive nitrogen-doped carbon dots N@PEGCDs . The as-prepared carbon dots N@PEGCDs show enhanced biocompatibility, small size, high fluorescence, and high quantum yield. The N@PEGCDs are used as a drug carrier for 5-fluorouracil (5-FU) with more release at acidic pH. Furthermore, the mode of action of drug-loaded CD ( 5FU-N@PEGCDs ) has also been explored by performing wound healing assay, DCFDA assay for ROS generation, and Hoechst staining...
June 27, 2023: ACS Applied Bio Materials
https://read.qxmd.com/read/37326411/a-multifunctional-nanozyme-with-nadh-dehydrogenase-like-activity-and-nitric-oxide-release-under-near-infrared-light-irradiation-as-an-efficient-therapeutic-for-antimicrobial-resistance-infection-and-wound-healing
#32
JOURNAL ARTICLE
Yi Wang, Hong-Dong Shi, Hai-Lin Zhang, Yu- Yu Chen, Bing Ren, Qi Tang, Qi Sun, Qian-Ling Zhang, Jin-Gang Liu
In recent years, antimicrobial resistance (AMR) has become one of the greatest threats to human health. There is an urgent need to develop new antibacterial agents to effectively treat AMR infection. Herein, a novel nanozyme platform {Cu, N-GQDs@Ru-NO} was prepared, where Cu, N-doped graphene quantum dots (Cu, N-GQDs) were covalently functionalized with a nitric oxide (NO) donor, ruthenium nitrosyl (Ru-NO). Under 808 nm near infrared (NIR) light irradiation, {Cu, N-GQDs@Ru-NO} demonstrated nicotinamide adenine dinucleotide (NADH) dehydrogenase-like activity for photo-oxidizing NADH to NAD+ , thus disrupting the redox balance in bacterial cells and resulting in bacterial death; meanwhile, the onsite NIR light-delivered NO effectively eradicated the methicillin-resistant staphylococcus aureus (MRSA) bacterial and biofilms, and promoted wound healing; furthermore, the nanozyme showed excellent photothermal effect that enhanced the antibacterial efficacy as well...
June 16, 2023: Advanced Healthcare Materials
https://read.qxmd.com/read/37323411/new-polymorphic-modifications-of-6-methyluracil-an-experimental-and-quantum-chemical-study
#33
JOURNAL ARTICLE
Svitlana V Shishkina, Anna M Shaposhnik, Victoriya V Dyakonenko, Vyacheslav M Baumer, Vitalii V Rudiuk, Igor B Yanchuk, Igor A Levandovskiy
Polymorphism of 6-methyluracil, which affects the regulation of lipid peroxidation and wound healing, has been studied by experimental and quantum chemical methods. Two known polymorphic modifications and two new crystalline forms were crystallized and characterized by single crystal and powder X-ray diffraction (XRD) methods as well as by the differential scanning calorimetry (DSC) method and infrared (IR) spectroscopy. The calculations of pairwise interaction energies between molecules and lattice energies in periodic boundary conditions have shown that the polymorphic form 6MU_I used in the pharmaceutical industry and two new forms 6MU_III and 6MU_IV , which can be formed due to temperature violations, may be considered as metastable...
June 13, 2023: ACS Omega
https://read.qxmd.com/read/37276430/quantum-dot-vitrimer-composites-an-approach-for-reprocessable-self-healable-and-sustainable-luminescent-materials
#34
JOURNAL ARTICLE
Yong-Yun Zhang, Kuan-Ting Liu, Mu-Huai Fang, Man-Kit Leung
Quantum dots (QDs) are of great concern in many fields. However, they suffer from high toxicity and may lead to environmental pollution. We report the development of a QD-vitrimer composite with reprocessable, self-healable, and sustainable properties. Our QD-vitrimer composite reveals fine transparency and highly uniform QDs distribution without significant aggregation. The photoluminescence quantum yield (PLQY) is basically about four times higher than the commercial QD films. The QD-vitrimer composites can be recycled at least three times without any significant loss in structure and luminescence efficiency...
June 5, 2023: ChemSusChem
https://read.qxmd.com/read/37255034/a-high-performance-metal-halide-perovskite-based-laser-driven-display
#35
JOURNAL ARTICLE
Shaoan Zhang, Zhenzhang Li, Zaijin Fang, Bao Qiu, Janak L Pathak, Kaniyarakkal Sharafudeen, S Saravanakumar, Zhanjun Li, Gang Han, Yang Li
Laser-driven liquid crystal displays (LCDs) comprising metal halide perovskites (MHPs) as the blue-to-green/red color converters are at the forefront of ongoing intense research on the development and improvement of display devices. However, the inferior high photoluminescence quantum yield (PLQY) of MHPs under the excitation of high-power blue light and photoluminescence deterioration at high temperatures remain major concerns. Herein, we design a kind of octylamine-modified MHP via binding energy engineering, and the synthesized materials show PLQY of 97...
May 31, 2023: Materials Horizons
https://read.qxmd.com/read/37087681/a-3d-bioprinted-nanoengineered-hydrogel-with-photo-activated-drug-delivery-for-tumor-apoptosis-and-simultaneous-bone-regeneration-via-macrophage-immunomodulation
#36
JOURNAL ARTICLE
Sayan Deb Dutta, Keya Ganguly, Jin Hexiu, Aayushi Randhawa, Md Moniruzzaman, Ki-Taek Lim
One of the significant challenges in bone tissue engineering (BTE) is the healing of traumatic tissue defects which requires longer time to recover owing to the recruitment of local infection and delayed angiogenesis. Various strategies, such as hydrogel dressings, growth factors delivery, and stem cell therapy has been shown potential alternative to the traumatic tissue repair; however, limited their actual clinical application due to the socio-economic burden. Herein, we reported a 3D printable multi-functional hydrogel scaffold composing polyphenolic carbon quantum dots (CQDs, 100 ug mL-1 ) and gelatin methacryloyl (GelMA, 12 wt...
April 23, 2023: Macromolecular Bioscience
https://read.qxmd.com/read/37056919/nanosonosensitizers-engineered-injectable-thermogel-for-augmented-chemo-sonodynamic-therapy-of-melanoma-and-infected-wound-healing
#37
JOURNAL ARTICLE
Yaling Zheng, Wei Wang, Yao Gao, Weiyi Wang, Renwu Zhang, Dejun Wu, Luodan Yu, Yu Chen
Easy recurrence and bacteria infected-wound healing after surgery excision pose severe challenges to clinical melanoma therapy. Herein, an injectable CuO2 nanodots-engineered thermosensitive chitosan hydrogel (CuO2 -BSO@Gel) for enhanced melanoma chemo-sonodynamic therapy and improved infected wound healing was rationally constructed by facilely integrating the CuO2 nanodots and L-Buthionine-(S, R)-sulfoximine (BSO) with thermoresponsive hydrogel. Favored by the Fenton catalytic activity of Cu2+ , the CuO2 nanodots can achieve enhanced chemodynamic therapy (CDT) by self-supplying H2 O2 under acidic tumor microenvironment...
June 2023: Materials today. Bio
https://read.qxmd.com/read/36990023/graphene-quantum-dots-hybrid-hydrogel-as-an-avant-garde-biomimetic-scaffold-for-diabetic-wound-healing
#38
JOURNAL ARTICLE
Kumar Shivam, Abhyavartin Selvam, Sujata Sangam, Misba Majood, Siddhartha Pahari, Ranjan Patra, Arun K Sharma, Monalisa Mukherjee
In the age of fathoming biomedical predicaments, ardently emerged the field of materiobiology to effectively counter the archetypal and outdated therapies. Correspondingly, the subpar activity of the over-the-counter wound dressing pharmaceuticals have been dominated with the implementation of biocompatible, water-retaining exotic hydrogels to facilitate accelerated diabetic wound healing. Considering a strategy to develop a pragmatic biomimetic scaffold having the ability of dynamic wound healing with diminutive inflammation, we investigated the creation of graphene quantum dot (GQD)-polyacrylic acid (PAA) hybrid hydrogel...
March 21, 2023: Biomater Adv
https://read.qxmd.com/read/36963550/integrated-photo-inspired-antibacterial-polyvinyl-alcohol-carboxymethyl-cellulose-hydrogel-dressings-for-ph-real-time-monitoring-and-accelerated-wound-healing
#39
JOURNAL ARTICLE
Yuanyuan Yang, Chong Zhang, Ming Gong, Yuan Zhan, Zhenkun Yu, Chang Shen, Yuhong Zhang, Li Yu, Zhaoxia Chen
Recurrent infection of chronic wounds remains a major clinical challenge. Recently, the hydrogel antibacterial materials have attracted extensive attention for preventing infection in wound healing. In this study, a hybrid hydrogel made of polyvinyl alcohol - iodine (PAI), sodium carboxymethyl cellulose (CMC), and carbamino quantum dot (CQDs) was prepared by the cross-linking of hydrogen bonds, named as polyvinyl alcohol‑iodine/sodium carboxymethyl cellulose/carbon quantum dots (PAI/CMC/CQDs). The composite hydrogels exhibited the outstanding photothermal conversion efficiency with near infrared (NIR) light irradiation, and the high antibacterial activity against Staphylococcus aureus (S...
March 22, 2023: International Journal of Biological Macromolecules
https://read.qxmd.com/read/36949022/x-ray-study-of-cembranoids-with-flexible-rings-from%C3%A2-boswellia-papyrifera%C3%A2-resins-allowing-structural-revisions-of-misleading-structures-in-the-past-70-years
#40
JOURNAL ARTICLE
Madhu Babu Sura, Yan-Xia Zhu, Yongxian Cheng
30 new highly oxygenated and stereogenic 14-membered macrocyclic diterpenoids, papyrifuranols A-Z (1-26) and AA-AD (27-30), and 8 known analogs were isolated from Boswellia papyrifera resins. All the structures were characterized by detailed spectral analyses, quantum calculations, X-ray diffraction, and modified Mosher's methods. Notably, six previously reported structures were revised. Our study points out misleading factors of macrocyclic cembranoids (CBs) representation in the past 7 decades by analysis of 25 X-ray structures, lending a hand for innately challengeable structure identification of such flexible macrocyclic CBs and avoiding following the tracks of an overturned cart during future structure characterization and total synthesis...
March 22, 2023: Chemistry: a European Journal
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