Dr. Ilia N. Ivanov Profile

Dr. Ilia N. Ivanov

Research and Development Scientist at Oak Ridge National Lab

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Author

Publications (12)

Proceedings Article | 19 September 2017 Presentation

Effect of water adsorption on ionic and electronic transport in PEDOT:PSS (Conference Presentation)

Eric Muckley, Christopher Jacobs, Rajeev Kumar, Ilia Ivanov

Proceedings Volume 10364, 103640R (2017) https://doi.org/10.1117/12.2274496

KEYWORDS: Humidity, Biosensing, Adsorption, Sensors, Sodium, Ions, Biomimetics, Polymers, Optoelectronics, Biocompatible materials

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Progress in bionic sensing and bio-electronic interfacing requires a thorough understanding of electronic and ionic transport in functional bio-compatible materials. The well-known polymer mixture poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is central to many optoelectronic applications which necessitate flexible, transparent biocompatible materials. While PEDOT:PSS is traditionally studied for its hole transport properties and resistive H2O response, research interest has recently turned to ionic transport in the context of bio-electronic interfacing and sensing. Cations Na+ and K+ are often present in PEDOT:PSS as byproducts from industrial production. Uptake of water into PEDOT:PSS disrupts hydrogen bonding that maintains rigidity of the PSS matrix, causing film swelling and hydronium production due to water interaction at the hydrophilic SO3- moiety. As water uptake increases, mobility of Na+, K+, H3O+ and other ions may become hindered due to the formation of electrical double layers and hydration shells around ions. At the same time, water-induced swelling of the PSS matrix increases the distance between adjacent conductive PEDOT domains, which reduces electronic mobility. Despite its widespread use as a hole transport material in a variety of organic optoelectronic devices, the effect of water on electronic and ionic transport in PEDOT:PSS remains unclear. To probe both electronic and ionic response during water uptake, we perform ultra-wide range dielectric spectroscopy from sub-Hz to optical frequencies while changing humidity conditions in a controlled environment. We correlate the frequency-dependent measurements with those of a PEDOT:PSS-coated quartz crystal microbalance (QCM) to estimate the mass of adsorbed H2O in the film. We show that the presence of water has an effect on electronic and ionic mobility in the film and both electronic and ionic transport play a role in defining the optoelectornic properties of PEDOT:PSS under a wide range of humidities.

Proceedings Article | 21 April 2017 Presentation

Ultrafast charge and energy exchanges at hybrid interfaces involving 2D semiconductors (Conference Presentation)

Abdelaziz Boulesbaa, Kai Wang, Viktoriia Babicheva, Ivan Kravchenko, Ming-Wei Lin, Masoud Mahjouri-Samani, Mengkun Tian, Alexander Puretzky, Ilia Ivanov, Christopher Rouleau, Bobby Sumpter, David Geohegan

Proceedings Volume 10093, 1009308 (2017) https://doi.org/10.1117/12.2253659

KEYWORDS: Interfaces, Spectroscopy, Plasmons, Semiconductors, Heterojunctions, Aluminum, Excitons, Ultrafast phenomena, Optoelectronics, Femtosecond phenomena

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SPIE Journal Paper | 21 March 2017

Functional two/three-dimensional assembly of monolayer WS₂ and nickel oxide

Christopher Jacobs, Kai Wang, Anton Ievlev, Liam Collins, Eric Muckley, Ilia Ivanov

JPE, Vol. 7, Issue 01, 014001, (March 2017) https://doi.org/10.1117/12.10.1117/1.JPE.7.014001

KEYWORDS: Raman spectroscopy, Silicon, Excitons, Crystals, Polymethylmethacrylate, Oxides, Nickel, Scanning electron microscopy, Polymers, Doping

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SPIE Journal Paper | 1 November 2016

Morphology-defined interaction of copper phthalocyanine with O₂/H₂O

Eric Muckley, Nicholas Miller, Christopher Jacobs, Thomas Gredig, Ilia Ivanov

JPE, Vol. 6, Issue 04, 045501, (November 2016) https://doi.org/10.1117/12.10.1117/1.JPE.6.045501

KEYWORDS: Adsorption, Copper, Resistance, Molecules, Crystals, Diffusion, Interfaces, Gold, Molecular interactions, Crystallography

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Proceedings Article | 27 September 2016 Paper

Low-cost scalable quartz crystal microbalance array for environmental sensing

Eric Muckley, Cristain Anazagasty, Christopher Jacobs, Tibor Hianik, Ilia Ivanov

Proceedings Volume 9944, 99440Y (2016) https://doi.org/10.1117/12.2237942

KEYWORDS: Crystals, Crystallography, Environmental sensing, Sensors, Quartz, Oxygen, Digital filtering, Signal to noise ratio, Composites, Microcontrollers

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Proceedings Article | 27 September 2016 Paper

Effect of film morphology on oxygen and water interaction with copper phthalocyanine

Eric Muckley, Nicholas Miller, Thomas Gredig, Ilia Ivanov

Proceedings Volume 9944, 99440V (2016) https://doi.org/10.1117/12.2236514

KEYWORDS: Oxygen, Adsorption, Copper, Molecules, Crystals, Resistance, Diffusion, Interfaces, Crystallography, Gold

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Proceedings Article | 26 September 2016 Paper

Towards functional assembly of 3D and 2D nanomaterials

Christopher Jacobs, Kai Wang, Anton Ievlev, Eric Muckley, Ilia Ivanov

Proceedings Volume 9929, 99290C (2016) https://doi.org/10.1117/12.2238211

KEYWORDS: Nanolithography, Nanomaterials, Chemical vapor deposition, Interfaces, Raman spectroscopy, Crystals, Silica, Luminescence, Oxides, Optical properties

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Proceedings Article | 23 September 2016 Paper

Carbon nanotube-templated assembly of regioregular poly(3-alkylthiophene) in solution

Jiahua Zhu, Eric Stevens, Youjun He, Kunlun Hong, Ilia Ivanov

Proceedings Volume 9919, 991916 (2016) https://doi.org/10.1117/12.2238149

KEYWORDS: Polymers, Carbon nanotubes, Carbon, Nanolithography, Molecular assembly, Nanofibers, Transmission electron microscopy, Absorption, Crystals, Molecules

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SPIE Journal Paper | 19 July 2016

Imaging of electrical response of NiOx under controlled environment with sub-25-nm resolution

Christopher Jacobs, Anton Ievlev, Liam Collins, Eric Muckley, Pooran Joshi, Ilia Ivanov

JPE, Vol. 6, Issue 03, 038001, (July 2016) https://doi.org/10.1117/12.10.1117/1.JPE.6.038001

KEYWORDS: Resistance, Adsorption, Humidity, Crystals, Scanning probe microscopy, Oxides, Oxygen, Scanning electron microscopy, Surface roughness, Metals

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SPIE Journal Paper | 1 June 2016

Multimodal probing of oxygen and water interaction with metallic and semiconducting carbon nanotube networks under ultraviolet irradiation

Eric Muckley, Anthony Nelson, Christopher Jacobs, Ilia Ivanov

JPE, Vol. 6, Issue 02, 025506, (June 2016) https://doi.org/10.1117/12.10.1117/1.JPE.6.025506

KEYWORDS: Ultraviolet radiation, Resistance, Adsorption, Oxygen, Semiconductors, Crystals, Carbon, Molecules, Single walled carbon nanotubes, Carbon nanotubes

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Proceedings Article | 27 February 2016 Paper

Spatially resolved resistance of NiO nanostructures under humid environment

Christopher Jacobs, Anton Ievlev, Liam Collins, Eric Muckley, Pooran Joshi, Ilia Ivanov

Proceedings Volume 9749, 97491Q (2016) https://doi.org/10.1117/12.2214459

KEYWORDS: Thin films, Sensors, Oxygen, Humidity, Thin film devices, Nanoparticles, Gas sensors, Oxides, Pulsed laser deposition, Polymeric sensors, Resistance, Adsorption, Crystals, Scanning electron microscopy, Argon, Metals

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Proceedings Article | 24 February 2016 Paper

Effect of UV irradiation on adsorption/desorption of oxygen and water on carbon nanotubes

Eric Muckley, Anthony Nelson, Christopher Jacobs, Ilia Ivanov

Proceedings Volume 9745, 97451K (2016) https://doi.org/10.1117/12.2214462

KEYWORDS: Oxygen, Ultraviolet radiation, Adsorption, Resistance, Single walled carbon nanotubes, Molecules, Crystals, Chemisorption, Carbon nanotubes, Semiconductors

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Showing 5 of 12 publications

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