A5035990997- Carbon and Quantum Dots Applications
- Advanced Fiber Laser Technologies
- Nanocluster Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Network Technologies
- Nonlinear Photonic Systems
- Graphene and Nanomaterials Applications
- Plasmonic and Surface Plasmon Research
- Photorefractive and Nonlinear Optics
- 2D Materials and Applications
- MXene and MAX Phase Materials
- Nanoparticles: synthesis and applications
- Optical Coatings and Gratings
- Graphene research and applications
- Advanced Nanomaterials in Catalysis
- Advanced biosensing and bioanalysis techniques
- Photonic and Optical Devices
- Biosensors and Analytical Detection
- Physics of Superconductivity and Magnetism
- Laser-Ablation Synthesis of Nanoparticles
- Carbon Nanotubes in Composites
- Orbital Angular Momentum in Optics
- Magneto-Optical Properties and Applications
- Photonic Crystal and Fiber Optics
North Carolina Central University
2013-2023
Durham Technical Community College
2016-2020
Rose–Hulman Institute of Technology
2005-2010
University of Arkansas at Fayetteville
2003-2005
Zhejiang University
1993
This study investigated the effect of SWCNTs' length on their antimicrobial activity to bacterial cells in suspensions. Three different lengths SWCNTs (<1 μm, 1−5 and ∼5 μm) were tested. At same weight concentration, longer exhibited stronger activity. The fluorescence SEM images revealed that aggregated with more effectively, whereas short tended aggregate themselves without involving many cells. Moreover, pronounced concentration-dependence treatment time-dependence
Surface engineering of ultrathin MXene nanosheets <italic>via</italic><sc>l</sc>-ascorbic acid treatment under ambient conditions makes them more appealing for practical applications.
This study was designed to investigate the antimicrobial effects of CDots in combination with other reagents, including H2O2, Na2CO3, and AcOH (acetic acid). were synthesized passivated 2,2’-(ethylenedioxy)bis(ethylamine) (EDA). The minimal inhibitory concentration (MIC) 64 μg/mL on both Gram negative bacteria E.coli cells positive Bacillus subtilis cells. When combined antibacterial synergistic observed based fractional (FIC) index, further confirmed by an isobologram analysis viable cell...
This study investigated the photo-activated antibacterial function of a series specifically prepared carbon dots with 2,2′-(ethylenedioxy)bis(ethylamine) as surface functionalization molecule (EDA-CDots), whose fluorescence quantum yields (ΦF) ranged from 7.5% to 27%. The results revealed that effectiveness CDots' bactericidal was correlated their observed ΦF values. antimicrobial activities these EDA-CDots against both Gram negative and positive model bacterial species (E. coli Bacillus...
Background: Carbon dots (CDots) have recently been demonstrated their effective visible light-activated antimicrobial activities toward bacteria. This study was to evaluate and understand the roles of surface functionalities in governing activity CDots. Methods: Using laboratory model bacteria Bacillus subtilis, photo-activated three groups CDots with specifically selected different functionalization moieties were evaluated compared. The first group consisting by...
MXenes have attracted great attention as promising substrates for surface-enhanced Raman scattering (SERS) applications. However, the underlying SERS mechanism has not been a focus of any investigation. Herein, we report first systematic experimental study on activity titanium carbide (Ti3C2TX) nanosheets with thicknesses ranging from 5 to 120 nm, using methylene blue (MB) probe molecule. The and mathematical modeling results show that enhancement factor (EF) increases monotonically...
Carbon dots (CDots) are strongly absorptive over the visible spectrum, with effective photon-harvesting driving rich excited state processes and properties. In this work, spectroscopic probing of these properties is coupled evaluation photoinduced bactericidal function CDots, aimed toward making correlations among findings from former those latter on inactivation bacterial pathogens. Within general mechanistic framework for observed efficient antibacterial activities CDots under light...
Recently, a zipper two-dimensional (2D) material Bi2O2Se belonging to the layered bismuth oxychalcogenide (Bi2O2X: X = S, Se, Te) family, has emerged as an alternate candidate van der Waals 2D materials for high-performance electronic and optoelectronic applications. This hints towards exploring other members of Bi2O2X family their true potential oxysulfide (Bi2O2S) could be next member such Here, we demonstrate first time, scalable room-temperature chemical synthesis near-infrared (NIR)...
Carbon quantum dots (CDots) have recently been reported as a new class of visible light activated antimicrobial nanomaterials. This study reports the synergistic photoactivated interactions CDots with photosensitizers on bacterial cells.The effects surface passivation molecules 2,2'-(ethylenedioxy)bis(ethylamine) in combination photosensitizer methylene blue (MB) or toluidine (TB) at various concentrations were evaluated against Escherichia coli cells and without 1-hour illumination. The...
Stars form preferentially in clusters embedded inside massive molecular clouds, many of which contain high-mass stars. Thus, a comprehensive understanding star formation requires robust and statistically well-constrained characterization the early evolution these clusters. To achieve this, we designed ALMAGAL Large Program that observed 1017 star-forming regions distributed throughout Galaxy, sampling different evolutionary stages environmental conditions. In this work, present acquisition...
Carbon dots (CDots) are characterized by their optical properties including strong absorptions and bright colorful fluorescence emissions in the visible spectrum photoinduced redox characteristics as both potent electron acceptors donors. The reported study was for a systematic comparison of CDots from different synthetic approaches based on use pre-existing small carbon nanoparticles sourced pure soot versus formation similar situ via one-pot thermal carbonization organic molecular...
Carbon dots prepared by using a hybrid approach are demonstrated for their photoexcited state properties and bactericidal activities.
Effective photodynamic inactivation of MDR bacteria by CDots.
Abstract Rechargeable sodium-ion batteries are receiving intense interest as a promising alternative to lithium-ion batteries, however, the absence of high-performance anode materials limits their further commercialization. Here we prepare cobalt-doped tin disulfide/reduced graphene oxide nanocomposites via microwave-assisted hydrothermal approach. These maintain capacity 636.2 mAh g −1 after 120 cycles under current density 50 mA , and display 328.3 h 1500 2 A . The quantitative capacitive...
We use data from the ALMA Evolutionary Study of High Mass Protocluster Formation in Galaxy (ALMAGAL) survey to study 100 ALMAGAL regions at $\sim$ 1 arsecond resolution located between 2 and 6 kpc distance. Using 1.3mm line continuum we estimate flow rates onto individual cores. focus specifically on along filamentary structures associated with these Our primary analysis is centered around position velocity cuts H$_2$CO (3$_{0,3}$ - 2$_{0,2}$) which allow us measure fields, surrounding...
The antiviral function of carbon dots (CDots) with visible light exposure was evaluated, for which the model bacteriophages MS2 as a surrogate small RNA viruses were used. results show clearly that light-activated CDots are highly effective in diminishing infectivity both low and high titer samples to host E. coli cells, effects dot concentration- treatment time-dependent. action apparently causes no significant damage structural integrity morphology phage or breakdown capsid proteins, but...
Foodborne pathogens have long been recognized as major challenges for the food industry and repeatedly implicated in product recalls outbreaks of foodborne diseases. This study demonstrated application a recently discovered class visible-light-activated carbon-based nanoparticles, namely, carbon dots (CDots), photodynamic inactivation pathogens. The results that CDots were highly effective photoinactivation Listeria monocytogenes suspensions on stainless steel surfaces. However, it was much...
Carbon dots (CDots) in a general structure of small carbon nanoparticles with various surface passivation schemes have emerged to represent new class nanomaterials now rapidly advancing and expanding research field. Among synthesis methods, the use pre-processed selected for deliberate chemical functionalization particle organic molecules produced high-performance structurally better defined CDots. Specifically, 2,2'-(ethylenedioxy)bis(ethylamine) 3-ethoxypropylamine were used effective via...
This study aimed to address the significant problems of bacterial biofilms found in medical fields and many industries. It explores potential classic photoactive carbon dots (CDots), with 2,2′-(ethylenedioxy)bis (ethylamine) (EDA) for dot surface functionalization (thus, EDA-CDots) their inhibitory effect on B. subtilis biofilm formation inactivation cells within established biofilm. The EDA-CDots were synthesized by chemical selected small nanoparticles EDA molecules amidation reactions....
Bacillus anthracis is a pathogen that causes life-threatening disease--anthrax. B. spores are highly resistant to extreme temperatures and harsh chemicals. Inactivation of important ensure the environmental safety public health. The 2001 bioterrorism attack involving anthrax has brought acute attention triggered extensive research on inactivation spores. Single-walled carbon nanotubes (SWCNTs) as class emerging nanomaterial have been reported strong antimicrobial agent. In addition,...
Context. Investigating the flow of material along filamentary structures towards central core can help provide insights into high-mass star formation and evolution. Aims. Our main motivation is to answer question what properties accretion flows are in star-forming clusters. We used data from ALMA Evolutionary Study High Mass Protocluster Formation Galaxy (ALMAGAL) survey study 100 ALMAGAL regions at a ∼1″ resolution, located between ∼2 6 kpc. Methods. Making use ∼1.3 mm line continuum data,...