Publications

2016

First-principles calculation of contact electrification and validation by experiment

X. Shen, A. E. Wang, R. M. Sankaran and D. J. Lacks, J. Electrostatics, Vol. 82, 11 (2016)


The smooth transition from field emission to a self-sustained plasma in microscale electrode gaps at atmospheric pressure

M. A. Bilici, J. R. Haase, C. R. Boyle, D. B. Go and R. M. Sankaran, J. Appl. Phys., Vol. 119, 223301 (2016)


Triboelectric charging in single-component particle systems

D. J. Lacks and R. M. Sankaran, Particulate Sci. Technol., Vol. 34, 55 (2016)


Atmospheric-pressure plasma reduction of metal cation-containing polymer films to produce electrically conductive nanocomposites by an electrodiffusion mechanism

S. Ghosh, E. Ostrowski, R. Yang, D. Debnath, P. X.-L. Feng, C. A. Zorman and R. M. Sankaran, Plasma Chem. Plasma Process., Vol. 36, 295 (2016)



2015

Simulations of submicron aerosol deposition at an air-liquid interface for in vitro toxicology

C. M. Grabinski, S. M. Hussain and R. M. Sankaran, J. Aerosol Sci., Vol. 90, 87 (2015)


The effect of air on solvated electron chemistry at a plasma/liquid interface

P. Rumbach, D. M. Bartels, R. M. Sankaran and D. B. Go, J. Phys. D: Appl. Phys., Vol. 48, 424001 (2015)


Special issue on plasma synthesis of nanoparticles

R. M. Sankaran and U. Kortshagen, J. Phys. D: Appl. Phys., Vol. 48, 310301 (2015)


Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis

S. Ghosh, T. Liu, M. Bilici, J. Cole, I-M. Huang, D. Staack, D. Mariotti and R. M. Sankaran, J. Phys. D: Appl. Phys., Vol. 48, 314003 (2015)


The solvation of electrons by an atmospheric-pressure plasma

P. Rumbach, D. M. Bartels, R. M. Sankaran and D. B. Go, Nature Comm., Vol. 6, 7248 (2015)


Generation of a direct-current, atmospheric-pressure microplasma at the surface of a liquid water microjet for continuous plasma-liquid processing

S. Ghosh, B. Bishop, I. Morrison, R. Akolkar, D. Scherson, and R. M. Sankaran, J. Vac. Sci. Technol. A, Vol. 33, 021312 (2015)


Solid state transformations in consequence of electrospraying – A novel polymorphic form of piroxicam, European Journal of Pharmaceutics and Biopharmaceutics

M. Nystrom, J. Roine, M. Murtomaa, R. M. Sankaran, H. A. Santos, and J. Salonen, Eur. J. Pharmaceutics and Biopharmaceutics, Vol. 89, 182 (2015)



2014

Visualization of Electrolytic Reactions at a Plasma–Liquid Interface

P. Rumbach, N. Griggs, R. M. Sankaran, D. B. Go, IEEE Transactions on Plasma Science, Vol. 42, 2610 (2014)


Ligand–free Ni nanocluster formation at atmospheric pressure via rapid quenching in a microplasma process

A. Kumar, S. Kang, C. L–Andaluz, H. Ouyang, C. J. Hogan and R. M. Sankaran, Nanotechnology, Vol. 25, 385601 (2014)


Ligand–free Ni nanocluster formation at atmospheric pressure via rapid quenching in a microplasma process

A. Kumar, S. Kang, C. L–Andaluz, H. Ouyang, C. J. Hogan and R. M. Sankaran, Nanotechnology, Vol. 25, 385601 (2014)


Synthesis and in vacuo deposition of iron oxide nanoparticles by microplasma-assisted decomposition of ferrocene

M. Schaefer, A, R. M. Sankaran, and R. Schlaf, J. Appl. Phys., Vol. 116, 133703 (2014)


Particle size effects in particle-particle triboelectric charging studied with an integrated fluidized bed and electrostatic separator system

M. A. Bilici, J. R. Toth III, R. M. Sankaran and D. J. Lacks, Rev. Sci. Instrum. Vol. 85, 103903 (2014)


Predicting the chiral enrichment of metallic SWCNTs on Ni-Cu bimetallic surfaces

D. Dutta, R. M. Sankaran, and V. Bhethanabotla, J. Chem. Mater. Vol. 26, 4943 (2014)


Fabrication of electrically-conductive metal patterns at the surface of polymer films by microplasma-based direct writing

S. Ghosh, R. Yang, M. Kaumeyer, C. A. Zorman, S. J. Rowan, P. X.-L. Feng, and R. M. Sankaran, ACS Appl. Mater. Interfaces, Vol. 6, 3099 (2014)



2013

Decoupling interfacial reactions between plasmas and liquids: Charge transfer vs. plasma neutral reactions

P. Rumbach, M. Witzke, R. M. Sankaran, and D. B. Go, J. Am. Chem. Soc., Vol. 135, 16264 (2013)


Formation of nanodiamonds at near ambient conditions via microplasma dissociation of ethanol vapor

A. Kumar, P. A. Lin, A. Xue, B. Hao, Y. K. Yap, and R. M. Sankaran, Nat. Comm., Vol. 4, 2618 (2013)


Charge transfer processes at the interface between plasmas and liquids [Invited]

R. Akolkar and R. M. Sankaran, J. Vac. Sci. Technol. A, Vol. 31, 050811 (2013)


Fabrication of Ir nanoparticle-based biosensors by plasma electrochemical reduction for enzyme-free detection of hydrogen peroxide

S. W. Lee, M. Janyasub, C. C. Liu, and R. M. Sankaran, Catalysis Today, Vol. 211, 137-142 (2013)


Triboelectric charging in single component particle systems (Invited to Special Issue)

D. J. Lacks and R. M. Sankaran, Part. Sci. Technol. [in press]


Effects of material strain on triboelectric charging: Influence of material properties

M. Sow, D. J. Lacks, and R. M. Sankaran, J. Electrostat., 71(3), 396 (2013)


Role of humidity on the lift-off of particles in electric fields

M. Sow, A. R. Akande, K. S. Robinson, R. M. Sankaran, and D. J. Lacks, J. Brazilian Chem. Soc., 24(2), 273 (2013)


Metal-insulator transition in variably doped (Bi1-xSbx)2Se3 nanosheets

C. H. Lee, R. He, Z. H. Wang, R. L. J. Qiu, A. Kumar, C. Delaney, B. Beck, T. E. Kidd, C. C. Chancey, R. M. Sankaran, and X. P. A. Gao, Nanoscale, 5, 4337 (2013)



2012

New insights into plasma-assisted dissociation of organometallic vapors for gas-phase synthesis of metal nanoparticles (Invited to Special Issue)

P. A. Lin, A. Kumar, and R. M. Sankaran, Plasma Process. Polym. 9, 1184-1193 (2012)


Evidence for the electrolysis of water by atmospheric-pressure plasmas formed at the surface of aqueous solutions

M. Witzke, P. Rumbach, D. B. Go, and R. M. Sankaran, J. Phys. D 45, 442001 (2012)


Dependence of contact electrification on the magnitude of strain in polymeric materials

M. Sow, D. J. Lacks, and R. M. Sankaran, J. Appl. Phys. 112, 084909 (2012)


Formation of metal nanoparticle composites via “soft” plasma electrochemical reduction of metallosupramolecular polymer films

S. W. Lee, J. Kumpfer, P. A. Lin, G. Li, X. P. A. Gao, S. Rowan, and R. M. Sankaran, Macromolecules 45, 8201-8210 (2012)


Epitaxial nucleation model for chiral-selective growth of SWCNTs on bimetallic catalyst surfaces

D. Dutta, W.-H. Chiang, R. M. Sankaran, and V. Bhethanabotla, Carbon 50, 3766-3773 (2012)


Focused ion beam (FIB) nanomachining of silicon carbide (SiC) stencil masks for nanoscale patterning

H. Zamani, S. W. Lee, A. Avishai, C. A. Zorman, R. M. Sankaran, and P. X.-L. Feng, Mater. Sci. Forum 717, 889-892 (2012)


Centrifugal shape sorting of multifaceted gold nanoparticles using an atomic plane-selective surfactant

T. Tyler, P. A. Lin, Y. Tian, X. P. A. Gao, R. M. Sankaran, and M. C. Hersam, J. Phys. Chem. Lett. 3, 1484-1487 (2012)


Experiential learning and global perspective in an engineering core course

D. J. Lacks, C. Ketlogetswe, and R. M. Sankaran, Chem. Eng. Ed. 46, 110-117 (2012)


Plasma-assisted reduction of graphene oxide at low temperature and atmospheric pressure

S. W. Lee, C. Mattevi, M. Chhowalla, and R. M. Sankaran, J. Phys. Chem. Lett. 3, 772-777 (2012)


Strain-induced reversal of charge transfer in contact electrification

M. Sow, R. Widenor, A. Kumar, S. W. Lee, D. J. Lacks, and R. M. Sankaran, Angew. Chem. Int. Ed. 51, 2695-2697 (2012)


Shape-controlled Au particles for InAs nanowire growth

P. A. Lin, D. Liang, S. Reeves, X. P. A. Gao, and R. M. Sankaran, Nano Lett. 12, 315-320 (2012)


Extraction of a low-current discharge from a microplasma for nanopatterning applications at atmospheric pressure

S. W. Lee, H. Zamani, P. X. L. Feng, and R. M. Sankaran, J. Vac. Sci. Technol. B 30, 010603-1 (2012)


The influence of bimetallic catalyst composition on single-walled carbon nanotube yield


W-H. Chiang and R. M. Sankaran, Carbon 50, 1044-1050 (2012)



2011

Plasma-assisted dissociation of organometallic vapors for continuous, gas-phase preparation of multimetallic nanoparticles

P.A. Lin and R. M. Sankaran, Angew. Chem. Int. Ed. 50, 10953-10956 (2011)


Contact electrification of insulating materials

D. J. Lacks and R. M. Sankaran, J. Phys. D 44, 453001 (2011) [One of the most cited articles in the last two years (2013)]


Electron transfer reactions at the plasma-liquid interface

C. Richmonds, M. Witzke, B. Bartling, S. W. Lee, J. Wainright, C. C. Liu, and R. M. Sankaran, J. Am. Chem. Soc. 133, 17582-17585 (2011) [Highlighted in ScienceDaily, Physorg, The Engineer, R&D Magazine, Softpedia]


Electrification of particles in dust storms: field measurements during the monsoon period in Niger

M. Sow, E. Crase, J. L. Rajot, R. M. Sankaran, and D. J. Lacks, Atmos. Res. 102, 343-350 (2011)


Contact charging between surfaces of identical insulating materials in asymmetric geometries

R. Pham, R. C. Virnelson, R. M. Sankaran, and D. J. Lacks, J. Electrostatics 69, 456-460 (2011)


Direct writing of metal nanoparticles by localized plasma electrochemical reduction of metal cations in polymer films

S. W. Lee, D. Liang, X. P. A. Gao, and R. M. Sankaran, Adv. Funct. Mater. 21, 2155-2161 (2011)


Perspectives on atmospheric-pressure plasmas for nanofabrication [Invited]

D. Mariotti and R. M. Sankaran, J. Phys. D 44, 174023 (2011)


Towards chirality-controlled SWCNTs: can a plasma help? [Invited]

R. M. Sankaran, J. Phys. D 44, 174005 (2011)



2010

Microplasmas for nanomaterials synthesis [Invited Topical Review]

D. Mariotti and R. M. Sankaran, J. Phys. D 43, 323001 (2010), Cover Article


Microplasma-assisted growth of colloidal Ag nanoparticles for point-of-use surface-enhanced Raman scattering applications

F-C. Chang, C. Richmonds, and R. M. Sankaran, J. Vac. Sci. Technol. A 28, L5 (2010)


Continuous-flow, atmospheric-pressure microplasmas: a versatile source for metal nanoparticle synthesis in the gas or liquid phase

W-H. Chiang, C. Richmonds, and R. M. Sankaran, Plasma Sources Sci. Technol. 19, 034011 (2010)



2009

Nanoengineering NixFe1-x catalysts for gas-phase, selective synthesis of semiconducting single-walled carbon nanotubes

W-H. Chiang, M. Sakr, X. Gao, and R. M. Sankaran, ACS Nano 3, 4023-4032 (2009)


FTriboelectric charging of lunar regolith simulant

K. M. Forward, D. J. Lacks., and R. M. Sankaran, J. Geophys. Res. 114, A10109 (2009)


Linking catalyst composition to chirality distributions of as-grown single-walled carbon nanotubes by tuning NixFe1-x nanoparticles

W-H. Chiang and R. M. Sankaran, Nat. Mater. 8, 882-886 (2009). [Highlighted in Forbes.com, ScienceDaily, Physorg, Redorbit, Softpedia, Eureka! Science News, Chemie. D. E.]


Particle-size dependent bipolar charging of Martian regolith simulant

K. M. Forward, D. J. Lacks., and R. M. Sankaran, Geophys. Res. Lett. 36, L13201 (2009)


Relating carbon nanotube growth parameters to the size and composition of nanocatalysts

W-H. Chiang and R. M. Sankaran, Diam. Rel. Mater. 18, 946-952 (2009)


Methodology for studying particle-particle triboelectrification in granular materials

K. M. Forward, D. J. Lacks, and R. M. Sankaran, J. Electrostatics 67, 178-183 (2009)


Triboelectric charging of granular mixtures due solely to particle-particle interactions

K. M. Forward, D. J. Lacks, and R. M. Sankaran, Ind. Eng. Chem. Res. 48, 2309-2314 (2009)


Charge segregation depends on particle size in triboelectrically charged granular materials

K. M. Forward, D. J. Lacks, and R. M. Sankaran, Phys. Rev. Lett. 102, 028001 (2009)


Improving endodontic outcomes with nanotechnology

S. Chogle, A. Mickel, S. Qutubuddin, S. Shaikh, and R. M. Sankaran, CWRU The Value of Research, 24 (2008-09)



2008

Pulse voltammetry [of alloy metal catalysts] at fuel cell electrodes

P. Pietrasz, R. M. Sankaran, and T. A. Zawodzinski, ECS Trans. 16, 1583-1589 (2008)


Synergistic effects in bimetallic nanoparticles for low temperature carbon nanotube growth

W-H. Chiang and R. M. Sankaran, Adv. Mater. 20, 4857 (2008)


In-flight dimensional tuning of metal nanoparticles by microplasma synthesis for selective production of diameter-controlled carbon nanotubes

W-H. Chiang and R. M. Sankaran, J. Phys. Chem. C 112, 17920-17925 (2008)


Plasma-liquid electrochemistry: Rapid synthesis of colloidal metal nanoparticles by microplasma reduction of aqueous cations

C. Richmonds and R. M. Sankaran, Appl. Phys. Lett. 93, 131501 (2008)



pre-2007

Microplasma synthesis of metal nanoparticles for gas-phase studies of catalyzed carbon nanotube growth

W-H. Chiang and R. M. Sankaran, Appl. Phys. Lett. 91, 121503 (2007)


Nonlithographic fabrication of surface-enhanced Raman scattering substrates using a rastered atmospheric-pressure microplasma source

W-H. Chiang, M. Cochey, C. Virnelson, and R. M. Sankaran, Appl. Phys. Lett. 91, 021501 (2007)


Synthesis of blue luminescent Si nanoparticles using atmospheric-pressure microdischarges

R. M. Sankaran, D. Holunga, R. C. Flagan, and K. P. Giapis, Nano Lett. 5, 537-541 (2005)


Magnetic tests for magnetosome chains in martian meteorite ALH84001

B. P. Weiss, S. S. Kim, J. L. Kirschvink, R. E. Kopp, R. M. Sankaran, A. Kobayashi, and A. Komeili, Proc. Nat. Acad. Sci. 101, 8281-8284 (2004)


Ferromagnetic resonance and low temperature magnetic tests for biogenic magnetite

B. P. Weiss, S. S. Kim, J. L. Kirschvink, R. E. Kopp, R. M. Sankaran, A. Kobayashi, and A. Komeili, Earth Planet. Sci. Lett. 224, 73-89 (2004)


Argon excimer emission from high-pressure microdischarges in metal capillaries

R. M. Sankaran, K. P. Giapis, M. Moselhy, and K. H. Schoenbach, Appl. Phys. Lett. 83, 4728-4730 (2003)


High-pressure microdischarges in etching and deposition applications

R. M. Sankaran and K. P. Giapis, J. Phys. D 36, 2914-2921 (2003)


Hollow cathode sustained plasma microjets: Characterization and application to diamond deposition

R. M. Sankaran and K. P. Giapis, J. Appl. Phys. 92, 2406-2411 (2002)


Maskless etching of silicon using patterned microdischarges

R. M. Sankaran and K. P. Giapis, Appl. Phys. Lett. 79, 593-595 (2001)



Book chapters

Understanding the role of metal catalysts in carbon nanotube growth: toward chiral-selective growth of single-walled carbon nanotubes

W-H. Chiang and R. M. Sankaran, Handbook of Carbon Nano Materials, Volume 4: Materials and Fundamental Applications, Francis D`Souza and Karl M. Kadish, Eds., World Scientific Publishing Co.: Singapore (2012)


Plasma Processing of Nanomaterials

R. M. Sankaran (Ed.), Taylor & Francis Group: Boca Raton, FL (2012)


Microscale plasmas for metal and metal oxide nanoparticle synthesis

D. Mariotti and R. M. Sankaran, Taylor & Francis Group: Boca Raton, FL (2012)


Materials applications of high-pressure microplasmas

R. M. Sankaran and K. P. Giapis, Low Temperature Plasma Physics: Fundamental Aspects and Applications (R. Hippler, H. Kersten, M. Schmidt, and K. H. Schoenbach, Eds.), Wiley-VCH: Berlin, Germany (2007)