2022
Microbial biofilms as living photoconductors due to ultrafast electron transfer in cytochrome OmcS nanowires
Neu J, Shipps CC, Guberman-Pfeffer MJ, Shen C, Srikanth V, Spies JA, Kirchhofer ND, Yalcin SE, Brudvig GW, Batista VS, Malvankar NS. Microbial biofilms as living photoconductors due to ultrafast electron transfer in cytochrome OmcS nanowires. Nature Communications 2022, 13: 5150. PMID: 36071037, PMCID: PMC9452534, DOI: 10.1038/s41467-022-32659-5.Peer-Reviewed Original ResearchConceptsUltrafast electron transferElectron transferPhotoconductive atomic force microscopyFemtosecond transient absorption spectroscopyQuantum dynamics simulationsMicrobial electron transferAtomic force microscopyTransient absorption spectroscopyValue-added chemicalsIndividual nanowiresWhole-cell catalysisPhotoconductive materialForce microscopyCarrier densityCatalytic performanceNanowiresAbsorption spectroscopyPhotoactive proteinsEfficient productionPhotoconductorsSynthetic photosensitizersDynamics simulationsGeobacter sulfurreducensBiodegradable materialsElectronic interface
2020
Direct observation of anisotropic growth of water films on minerals driven by defects and surface tension
Yalcin SE, Legg BA, Yeşilbaş M, Malvankar NS, Boily JF. Direct observation of anisotropic growth of water films on minerals driven by defects and surface tension. Science Advances 2020, 6: eaaz9708. PMID: 32832658, PMCID: PMC7439304, DOI: 10.1126/sciadv.aaz9708.Peer-Reviewed Original ResearchMineral nanoparticlesWater filmAmplitude-modulated atomic force microscopyAtomic force microscopyFilm surface energySmooth film surfaceNanoscale topographyForce microscopySurface tensionWater vaporNanoparticlesMolecular simulationsAnisotropic growthHigh surface tensionSurface energyFilm surfaceThick filmsInhomogeneous thicknessThick meniscusFilm growthFilmsWater layerIce nucleationAtmospheric processesElement cycling
2015
Direct Imaging of Charge Transport in Progressively Reduced Graphene Oxide Using Electrostatic Force Microscopy
Yalcin SE, Galande C, Kappera R, Yamaguchi H, Martinez U, Velizhanin KA, Doorn SK, Dattelbaum AM, Chhowalla M, Ajayan PM, Gupta G, Mohite AD. Direct Imaging of Charge Transport in Progressively Reduced Graphene Oxide Using Electrostatic Force Microscopy. ACS Nano 2015, 9: 2981-2988. PMID: 25668323, DOI: 10.1021/nn507150q.Peer-Reviewed Original ResearchElectrostatic force microscopyGraphene oxideOptical propertiesDirect imagingThin-film optoelectronic applicationsForce microscopyEFM measurementsOptoelectronic propertiesCharge transportDevelopment of GOQuantum chemistry calculationsOptical spectroscopyGood electrical conductivityOptoelectronic devicesOptoelectronic applicationsFlexible thin filmsPhotoluminescence imagingChemistry calculationsThin filmsPhase transitionTheoretical modelingMultifunctional materialsPotential barrierBulk quantitiesCharge propagation
2014
Visualization of charge propagation along individual pili proteins using ambient electrostatic force microscopy
Malvankar NS, Yalcin SE, Tuominen MT, Lovley DR. Visualization of charge propagation along individual pili proteins using ambient electrostatic force microscopy. Nature Nanotechnology 2014, 9: 1012-1017. PMID: 25326694, DOI: 10.1038/nnano.2014.236.Peer-Reviewed Original Research
2011
Spectral Properties of Multiply Charged Semiconductor Quantum Dots
Yalcin SE, Labastide JA, Sowle DL, Barnes MD. Spectral Properties of Multiply Charged Semiconductor Quantum Dots. Nano Letters 2011, 11: 4425-4430. PMID: 21905683, DOI: 10.1021/nl2026103.Peer-Reviewed Original ResearchElectrostatic force microscopyQuantum dotsSingle CdSe/ZnS quantum dotsSemiconductor quantum dotsBand-edge electronsBand edge luminescenceCdSe/ZnS quantum dotsElectronic perturbationZnS quantum dotsRecombination energyExcess electronsBlue shiftForce microscopyCantilever responseQD samplesQD luminescenceElectronsExcess chargeSpectral propertiesDotsSignificant fractionLuminescence