Total     127	(https://www.researchgate.net/profile/Rudolf-Kiefer?ev=prf_overview) (https://www.webofscience.com/wos/author/record/E-9834-2014) (https://scholar.google.com/citations?user=PyGqNTcAAAAJ&hl=en) (https://orcid.org/my-orcid?orcid=0000-0001-7692-6705)
Journal Articles	H-index WOS (Google Scholar)	Citations	Book chapter	Conference-associated publications	Reprints	Patents granted
99	23 (27)	1478	4	21	1	2

Patents

1. Kiefer. R-J. Lee, (2011), Fiber containing nano bubbles and Fabrication Method thereof, TWI458868B
2. G. Weis, R. Kiefer, J. Heinze, G. Urban, (2006), Vorrichtung zur Bewegung von Flüssigkeiten und/oder Gasen, DE102006003744A

Book chapter 

Le, Q.B., Kiefer, R., Vo, P.N.X., Kazantseva, N.E., Saha, P. (2024). Conducting Polymers for Pseudocapacitors. In: Gupta, R.K. (eds) Pseudocapacitors. Engineering Materials. Springer, Cham. https://doi.org/10.1007/978-3-031-45430-1_9

 

Kiefer, R., Vo, P.N.X., Kazantseva, N.E., Saha, P., Le, Q.B. (2023). Redox-Active Polymeric Materials Applied for Supercapacitors. In: Gupta, R.K. (eds) Recent Advancements in Polymeric Materials for Electrochemical Energy Storage. Green Energy and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-99-4193-3_13

 

Vo, P.N.X., Kiefer, R., Kazantseva, N.E., Saha, P., Le, Q.B. (2023). Materials for Electrochemical Energy Storage: Introduction. In: Gupta, R.K. (eds) Recent Advancements in Polymeric Materials for Electrochemical Energy Storage. Green Energy and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-99-4193-3_1

 

Le, Q.B., Kiefer, R., Dao, T.T., Kazantseva, N.E., Saha, P. (2022). Recent and Future Research Related to the Use of Conducting Polymers for Supercapacitors. In: Gupta, R.K. (eds) Organic Electrodes. Engineering Materials. Springer, Cham. https://doi.org/10.1007/978-3-030-98021-4_16

 

Conference proceedings

Conference proceedings, mainly SPIE proceedings, are listed at my research gate profile www.researchgate.net/profile/Rudolf_Kiefer

 Peer-reviewed Journals (* corresponding authors)

 

 

2026

 

A.R. Delawary, C. Bubulinca, N.E. Kazantseva, P. Saha, Q.B. Le, R.K. Gupta, R. Kiefer^*, Asymmetric Supercapacitor Based on Biomass-Derived Carbon Electrodes Functionalized with NdFeB. Materials 2026, 19, 1257. https://doi.org/10.3390/ma19061257

 

Kiefer, N. T. Nguyen, and T. F. Otero, Core Fiber Stiffness and Solvent Influence on Polypyrrole Fiber Actuators, Journal of Applied Polymer Science (2026) e70863. https://doi.org/10.1002/app.70863

 

Kiefer^*, F.M. de Souza, Q.B. Le, R.K. Gupta, T.F. Otero, Influence of cation size on the polypyrrole triflate mixed linear actuation: Cation/anion channel transition membranes, Electrochimica Acta, 568 (2026) 148863. https://doi.org/10.1016/j.electacta.2026.148863

 

N. Nguyen, T. C. Ly, N. Tran, N. H. Nguyen, R. Kiefer, T. T. Pham, H. M. Tran, H. P. Nguyen & T. P. Dinh, Cost-effective plant-based medium for enhanced spore production of B. amyloliquefaciens CN12 for biofertilizer application. Sci Rep(2026) 16 (2026) 12276. https://doi.org/10.1038/s41598-026-42679-6

 

2025

Kiefer^*, T.F. Otero, M. Harjo, Q.B. Le, Chemically Polymerized Polypyrrole on Glucose-Porcine Skin Gelatin Nanofiber as Multifunctional Electrochemical Actuator-Sensor-Capacitor, Polymers 17 (2025) 631. https://doi.org/10.3390/polym17050631.

 

Kiefer^*, N.T. Nguyen, Q.B. Le, Alkali Metal Ion Insertion in Polypyrrole Polyoxometalates for Multifunctional Actuator–Sensor–Energy Storage Devices, Polymers 17 (2025) 1–19. https://doi.org/10.3390/polym17030262.

 

Kesküla, F. Elhi, T.F. Otero and R. Kiefer^*, The potential range switches between anion and cation-driven actuation: Comparative study of three actuating polypyrrole materials in organic media, Electrochim. Acta 513 (2025) 145577. https://doi.org/10.1016/j.electacta.2024.145577.

 

Elhi, Quoc, B. Le, R. Kiefer^*, Multifunctionality of Cellulose Multiwall Carbon Nanotube Composites in Polar Aprotic and Polar Protic Solvents, J. Appl. Polym. Sci. 142 (2025) e56913. https://doi.org/10.1002/app.56913.

 

.Q. Khuyen, Z. Zondaka, T.F. Otero, R. Kiefer, Electropolymerization and dual actuating-sensing capabilities of polypyrrole composites with two organic particles, Synth. Met. 311 (2025) 117825. https://doi.org/10.1016/j.synthmet.2025.117825.

 

Md A. Rahman, R. Kiefer, I. Must, T. Tamm, Triboelectric properties on treated human hair: a mesoscale method to measure the surface potential, Journal of Electrostatics 138 (2025) 104162. https://doi.org/10.1016/j.elstat.2025.104162

 

A.R. Delawary, C. Bubulinca,V. Pechancová, N. E. Kazantseva, P. Saha, R. Kiefer*, and Q. B. Le*, Aerogel made of ternary metal sulfide FeCo2S4 and rGO enhanced with biowaste activated carbon and PANI for supercapacitor, Front. Energy Res. 13 (2025) 1663842. https://doi:10.3389/fenrg.2025.1663842

 

C.B. Tran, Q.B. Le, R. Kiefer, Linear Actuation of Dielectrophoretic Formed Multi-Walled Carbon Nanotube Fiber with Carbide-Derived Carbon in Polar Aprotic and Polar Protic Solvents. Materials 18 (2025) 3254. https://doi.org/10.3390/ma18143254

 

2024

Kiefer^*, M. Harjo, T.F. Otero, N.T. Nguyen, Q.B. Le, Linear sensing actuators of polypyrrole nanofiber scaffolds, J. Appl. Polym. Sci. 141 (2024) 1–13. https://doi.org/10.1002/app.55300.

 

Elhi, Q.B. Le, R. Kiefer^*, Cation-Selective Actuator–Sensor Response of Microcrystalline Cellulose Multi-Walled Carbon Nanotubes of Different Electrolytes Using Propylene Carbonate Solvent, Polymers (Basel). 16 (2024) 339. https://doi.org/10.3390/polym16030339.

 

Kesküla, F. Elhi, T.F. Otero, R. Kiefer^*, Simultaneous electropolymerization of pyrrole and anionic or cationic polymerizable monomeric ionic liquids. Linear actuation of the attained materials, React. Funct. Polym. 198 (2024) 105892. https://doi.org/10.1016/j.reactfunctpolym.2024.105892.

 

Babkova, R. Kiefer, Q.B. Le, Hybrid Electrolyte Based on PEO and Ionic Liquid with In Situ Produced and Dispersed Silica for Sustainable Solid-State Battery, Sustain. 16 (2024). https://doi.org/10.3390/su16041683.

 

Kiefer, I. Sapurina, C. Bubulinca, L. Munster, A.R. Delawary, N. Bugarova, M. Mičušík, M. Omastova, N.E. Kazantseva, P. Saha, Q.B. Le, Composite materials for supercapacitor electrodes utilizing polypyrrole nanotubes, reduced graphene oxides and metal–organic framework, Curr. Sci. 127 (2024) 537–543. https://doi.org/10.18520/cs/v127/i5/537-543.

2023

C.B. Tran, T.F. Otero, J. Travas-Sejdic, Q. Bao Le, R. Kiefer^*, A comparison of poly (3,4-ethylenedioxythiophene) polymerized potentiostatically and galvanostatically, Synth. Met. 299 (2023) 117466. https://doi.org/10.1016/j.synthmet.2023.117466.

 

Q.B. Le, Z. Zondaka, N.T. Nguyen, R. Kiefer^*, Ion-selectivity of polypyrrole carbide-derived carbon films in aqueous electrolytes, J. Appl. Polym. Sci. 140 (2023) 1–14. https://doi.org/10.1002/app.53522.

 

N.Q. Khuyen, F. Elhi, Q.B. Le, R. Kiefer^*, Sustainability of Multiwall Carbon Nanotube Fibers and Their Cellulose Composite, Sustainability 15 (2023) 9227. https://doi.org/10.3390/su15129227.

 

Elhi, L. Puust, R. Kiefer^*, T. Tamm, Electrolyte contribution to the multifunctional response of cellulose carbon nanotube fibers, React. Funct. Polym. 182 (2023) 105480. https://doi.org/10.1016/j.reactfunctpolym.2022.105480.

 

Kumar VB, Lee CH, Su TC, Lin CC, Mohammedsaleh ZM, Yeh CM, Kiefer R, Lin SH. Prognostic and Clinical Implications of UNC13C expression in Hepatocellular Carcinoma Patients. Int J Med Sci. 2023 Aug 6; 20(9):1235-1239. doi: 10.7150/ijms.80488. PMID: 37575271; PMCID: PMC10416712.

2022

Kiefer^*, Q. B. Le, B. K. Velmurugan, T. F. Otero, Artificial muscle like behavior of polypyrrole polyethylene oxide independent of applied potential ranges, J Appl Polym Sci. (2022) e52039. https://doi.org/10.1002/app.52039

 

Q. Khuyen, N. T. Nguyen and R. Kiefer^*, Polypyrrole Polyethylene Composite for Controllable Linear Actuators in Different Organic Electrolytes, Materials (2022) 540 1-16. https://doi.org/10.3390/ma15020540

 

T. Nguyen, V. T. Vo, T. H. P. Nguyen, R. Kiefer, Isolation and optimization of a glyphosate‑degrading Rhodococcus soli G41 for bioremediation, Archives of Microbiology (2022) 204 252. https://doi.org/10.1007/s00203-022-02875-0

 

B. Le, T.‑H. Nguyen, H. Fei, C. Bubulinca, L. Munster, N. Bugarova, M. Micusik, R. Kiefer, T. T. Dao, M. Omastova, N. E. Kazantseva & P. Saha, Electrochemical performance of composite electrodes based on rGO, Mn/Cu metal–organic frameworks, and PANI, Scientific Reports (2022) 12 664. https://doi.org/10.1038/s41598-021-04409-y

 

B. Le, Z. Zondaka, M. Harjo, N. T. Nguyen and R. Kiefer^*, Role of Polyoxometalate Contents in Polypyrrole: Linear Actuation and Energy Storage, Materials (2022) 15 3619 1-16. https://doi.org/10.3390/ma15103619

 

M-J. Hsieh, C-Y. Huang, R. Kiefer, S-D. Lee, N. Maurya and B. K. Velmurugan, Cardiovascular Disease and Possible Ways in Which Lycopene Acts as an Efficient Cardio-Protectant against Different Cardiovascular Risk Factors, Molecules (2022) 27 3235 1-16. https://doi.org/10.3390/molecules27103235

 

Kiefer^*, M. Plaado, M. Harjo, T. Tamm, Tuning the linear actuation of multiwall carbon nanotube fibers with carbide-derived carbon, Synthetic Metals 288 (2022) 117099. https://doi.org/10.1016/j.synthmet.2022.117099

 

Kiefer*, F. Elhi, L. Puust, A.-L. Peikolainen, T. Tamm, Dual function composite fibers of cellulose with activated carbon aerogel and carbide derived carbon, J. Appl. Polym. Sci. 139 (2022) 52297. https://doi.org/10.1002/app.52297.

 

Kiefer^*, F. Elhi, A.-L. Peikolainen, L. Puust, T. Tamm, The importance of potential range choice on the electromechanical response of cellulose - carbon nanotube fibers, Synth. Met. 283 (2022) 116966. https://doi.org/10.1016/j.synthmet.2021.116966.

2021

G. Weis, R. Kiefer^*, Z. Zondaka, T. Tamm, G. Urban, Polypyrrole and poly(3,4-ethylenedioxythiophene) on silicon cantilever: Role of formation potential in bending displacement, Synthetic Metals (2021) 271 116653. https://doi.org/10.1016/j.synthmet.2020.116653

 

Kiveste, R. Kiefer^*, R. E. Haamer, G. Anbarjafari and T. Tamm, A Kirigami Approach of Patterning Membrane Actuators, Polymers (2021) 125 1-12. https://doi.org/10.3390/polym13010125

 

Kiefer^*, N.T. Nguyen, Q. B. Le, G. Anbarjafari and T. Tamm, Antagonist Concepts of Polypyrrole Actuators: Bending Hybrid Actuator and Mirrored Trilayer Linear Actuator, Polymers (2021) 861 1-15. https://doi.org/10.3390/polym13060861

 

Q. Khuyen, P. V. D. Han, N. T. Nguyen, Q. B. Le, M. Harjo, G. Anbarjafari, R. Kiefer^* and T. Tamm, The Use of Laminates of Commercially Available Fabrics for Anti-Stab Body-Armor, Polymers (2021) 13 1077 1-12. https://doi.org/10.3390/polym13071077

 

N.T. Nguyen, T.T.T. Pham, T.N. Tran, V.B. Kumar, S. Saikia and R. Kiefer, Identification and Biodegradation Potential of a Novel Strain of Kosakonia oryzae Isolated from a Polyoxyethylene Tallow Amine Paddy Soil, Current Microbiology (2021) 78 3173-3180. https://doi.org/10.1007/s00284-021-02592-9

 

Malalakshima, C.-Y. Huang, S.-D. Lee, N. Maurya, R. Kiefer and V.B. Kumar, Review of Danshen: From its metabolism to possible mechanisms of its biological activities, Journal of Functional Foods (2021) 85 104613. https://doi.org/10.1016/j.jff.2021.104613

 

Kiefer^*, D. G. Weis, V.B. Kumar, T. Tamm and G. Urban, Ion Mobility in Thick and Thin Poly-3,4 Ethylenedioxythiophene Films—From EQCM to Actuation, Polymers (2021) 13 2448 1-15. https://doi.org/10.3390/polym13152448

 

esküla, A.-L. Peikolainen, P. Kilmartin, R. Kiefer^*, Solvent Effect in Imidazole-Based Poly(Ionic Liquid) Membranes: Energy Storage and Sensing, Polymers (2021) 13 3446 1-16. https://doi.org/10.3390/polym13203466

 

B. Tran, Z. Zondaka, Q. B. Le, B. K. Velmurugan and R. Kiefer^*, Polypyrrole with Phosphor Tungsten Acid and Carbide-Derived Carbon: Change of Solvent in Electropolymerization and Linear Actuation, Materials (2021) 14 6302 1-18. https://doi.org/10.3390/ma14216302

 

Kiefer^*, F. Elhi, A-L. Peikolainen and T. Tamm, Wider Potential Windows of Cellulose Multiwall Carbon Nanotube Fibers Leading to Qualitative Multifunctional Changes in an Organic Electrolyte, Polymers (2021) 13 4439 1-14. https://doi.org/10.3390/polym13244439

2020

Harjo, Z. Zondaka, K. Leemets, M. Järvekülg, T. Tamm, R. Kiefer^*, Polypyrrole-coated fiber-scaffolds: Concurrent linear actuation and sensing, Journal of Applied Polymer Science (2020) 48533 1-8. https://doi.org/10.1002/app.48533

 

Kesküla, I. Heinmaa, T. Tamm, N. Aydemir, J. Travas-Sejdic, A.-L. Peikolainen, R. Kiefer^*, Improving the Electrochemical Performance and Stability of Polypyrrole by Polymerizing Ionic Liquids, Polymers (2020) 136 1-13. https://doi.org/10.3390/polym12010136

 

Khadka, P. Zhang, N. T. Nguyen, T. Tamm, J. Travas-Sejdic, T. F. Otero, R. Kiefer^*, Role of polyethylene oxide content in polypyrrole linear actuators, Materials Today Communications (2020) 23 100908. http://doi.org/10.1016/j.mtcomm.2020.100908

 

Põldsalu, K. Rohtlaid, C. Plesse, F. Vidal, N. T. Nguyen, A.-L. Peikolainen, T. Tamm, R. Kiefer^*, Printed PEDOT:PSS Trilayer: Mechanism Evaluation and Application in Energy Storage, Materials (2020) (13) 491 1-13. https://doi.org/10.3390/ma13020491

 

T.K. Tran, H. J.Leu, T. Q. Vu, M. T. Nguyen, T. A. Pham, R. Kiefer, Hydrogen production from the tannery wastewater treatment by using agriculture supports membrane/adsorbents electrochemical system, International Journal of Hydrogen Energy, (2020) 45 (6) 3699-3711. https://doi.org/10.1016/j.ijhydene.2019.05.040

 

M.S. Khorram, G. Zhang, A. Fatemi, R. Kiefer, A. Mahmood, S. Jafarnia, Md P. Zakaria, G. Li, Effect of walnut shell biochars on soil quality, crop yields, and weed dynamics in a 4-year field experiment, Environmental Science and Pollution Research (2020) 27 18510-18520. https://link.springer.com/article/10.1007/s11356-020-08335-w

 

Harjo, M. Järvekülg, T. Tamm, T. F. Otero, R. Kiefer^*, Concept of an artificial muscle design on polypyrrole nanofiber scaffolds. PLoSONE (2020) 15(5) e0232851. https://doi.org/10.1371/journal.pone.0232851

 

N.Q. Khuyen, R. Kiefer^*, F. Elhi, G. Anbarjafari, J. G. Martinez and T. Tamm, A Biomimetic Approach to Increasing Soft Actuator Performance by Friction Reduction, Polymers (2020) 1120 (12) 1-13. https://doi.org/10.3390/polym12051120

 

Kesküla, A.-L. Peikolainen, R. Kiefer^*, T. Tamm, Consistent response from conducting polymer actuators: Potential window and embedded charges to avoid mixed ion transport, Synthetic Metals (2020) 268 116502. https://doi.org/10.1016/j.synthmet.2020.116502

 

Elhi, A.-L. Peikolainen, R. Kiefer^* and T. Tamm, Cellulose-Multiwall Carbon Nanotube Fiber Actuator Behavior in Aqueous and Organic Electrolyte, Materials (2020) 13 3213. https://doi.org/10.3390/ma13143213

 

Q. Khuyen, R. Kiefer^*, Z. Zondaka, G. Anbarjafari, A.-L. Peikolainen , T. F. Otero and T. Tamm, Multifunctionality of Polypyrrole Polyethyleneoxide Composites: Concurrent Sensing, Actuation and Energy Storage, Polymers (2020) 12 2060. https://doi.org/10.3390/polym12092060

 

2019

M.Tania, J. Shawon, K. Saif, R. Kiefer, M. Safaei Khorram, Md. A. Halim, and Md. A. Khan, Cordycepin Downregulates Cdk-2 to Interfere with Cell Cycle and Increases Apoptosis by Generating ROS in Cervical Cancer Cells: in vitro and in silico Study, Current Cancer Drug Targets (2019) 19 152-159. https://doi.org/10.2174/1568009618666180905095356

 

Q.Khuyen, J. G. Martinez, F. Kaasik, T. Tamm, T. F. Otero, R. Kiefer^*, Solvent effects on carbide-derived-carbon trilayer bending actuators, Synthetic Metals (2019) 247 170–176. http://doi.org/10.1016/j.synthmet.2018.12.002

 

T. Khanh, A. Kesküla, Z. Zondaka, M. Harjo, A. Kivilo, M. S. Khorram, T. Tamm, R. Kiefer^*, Role of polymerization temperature on the performance of polypyrrole/dodecylbenzenesulphonate linear actuators, Synthetic Metals (2019) 247 53–58. http://doi.org/10.1016/j.synthmet.2018.11.013

 

M.S. Khorram, G. Zhang, A. Fatemi, R, Kiefer, K. Maddah,M. Baqar, Md P. Zakaria and G. Li, Impact of biochar and compost amendment on soil quality, growth and yield of a replanted apple orchard in a 4-year field study, J Sci Food Agric  (2019) 99 1862-1869. https://doi.org/10.1002/jsfa.9380

 

Q. Khuyen, Z. Zondaka, M. Harjo, J. Torop , T. Tamm and R. Kiefer^*, Comparative Analysis of Fluorinated Anions for Polypyrrole Linear Actuator Electrolytes, Polymers (2019) 849 (11) 1-13. http://doi.org/10.3390/polym11050849

 

Harjo, J. Torop, M. Järvekülg, T. Tamm and R. Kiefer^*, Electrochemomechanical Behavior of Polypyrrole-Coated Nanofiber Scaffolds in Cell Culture Medium, Polymers (2019) 1043 (11) 1-12. http://doi.org/10.3390/polym11061043

 

Harjo, T. Tamm, G. Anbarjafari and R. Kiefer^*, Hardware and Software Development for Isotonic Strain and Isometric Stress Measurements of Linear Ionic Actuators, Polymers (2019) 1054 (11) 1-14. https://doi.org/10.3390/polym11061054

 

Nguyen, T. H. M. Phan, T. N. Tran, B. K. Velmurugan and R. Kiefer, Production of novel bio-flocculants from Klebsiella variicola BF1 using cassava starch wastewater and its application, Current Science (2019) 117 (1) 121-129. http://dx.doi.org/10.18520/cs/v117/i1/121-129

 

2018

Kiefer, R. Khadka, J. Travas-Sejdic, Poly(ethylene oxide) in polypyrrole doped dodecylbenzenesulfonate: characterisation and linear actuation, Int. J. Nanotechnol (2018) 15 (8/9/10) 689-694. http://dx.doi.org/10.1504/IJNT.2018.098435

 

Zondaka, A. Kivilo, S. Nakshatharan, K.-A. Küppar, U. Johanson, T. Tamm, R. Kiefer^*, Carbide-derived carbon and poly-3,4-ethylenedioxythiphene composite laminate: linear and bending actuation, Synthetic Metals (2018) 245 67–73. http://doi.org/10.1016/j.synthmet.2018.08.010

 

Zondaka, M. Harjo, M.S. Khorram, P. Rasti, T. Tamm, R. Kiefer^*, Polypyrrole/carbide-derived carbon composite in organic electrolyte: Characterization as a linear actuator, Reactive and Functional Polymers (2018) 131 414-419. http://doi.org/10.1016/j.reactfunctpolym.2018.08.020

 

Põldsalu, U. Johanson, T. Tamm, A. Punning, F. Greco, A.-L. Peikolainen, R. Kiefer^*, A. Aabloo, Mechanical and electro-mechanical properties of EAP actuators with inkjet printed electrodes, Synthetic Metals (2018) 246 122–127. http://doi.org/10.1016/j.synthmet.2018.10.009

 

Zondaka, M,Harjo, Md A. Khan, T. T. Khanh, T. Tamm and R. Kiefer^*, Optimal phosphotungstinate concentration for polypyrrole linear actuation and energy storage, Multifunct. Mater. (2018) 1 014003. http://doi.org/10.1088/2399-7532/aae8a4

 

T. Khanh, R.-J. Lee, P. A. Kilmartin, Md. A. Khan, M. S. Khorram, T. Tamm, R. Kiefer^*, Actuation increase in polypyrrole bilayer by photo-activated dopants, Synthetic Metals (2018) 246 57–63. http://doi.org/10.1016/j.synthmet.2018.10.001

 

Khadka, Z. Zondaka, A. Kesküla, M. S. Khorram, T. T. Khanh, T. Tamm, J. Travas-Sejdic, R. Kiefer^*, Influence of solvent on linear polypyrrole–polyethylene oxide actuators, Journal of Applied Polymer science (2018) 135 46831. http://doi.org/10.1002/app.46831

 

Põldsalu, K. Rohtlaid, T. M. G. Nguyen, C. Plesse, F. Vidal, M. S. Khorram, A.-L. Peikolainen, T. Tamm, R. Kiefer^*, Thin ink-jet printed trilayer actuators composed of PEDOT:PSS on interpenetrating polymer networks, Sensors and Actuators B (2018) 258 1072–1079. http://doi.org/10.1016/j.snb.2017.11.147

 

S. Khorram, A. Fatemi, Md. A. Khan, R. Kiefer, S. Jafarnia, Potential risk of weed outbreak by increasing biochar’s application rates in slow-growth legume, Lentil (Lens culinaris Medik.), J Sci Food Agric. (2018) 98 2080-2088. https://doi.org/10.1002/jsfa.9380

 

2017

Zondaka, A. Kesküla, T. Tamm, R. Kiefer^*, Polypyrrole linear actuation tuned by phosphotungstic acid, Sensors and Actuators B (2017) 247 742–748. http://doi.org/10.1016/j.snb.2017.03.061

 

Khadka, N. Aydemir, A. Kesküla, T. Tamm, J. Travas-Sejdic, R. Kiefer^*, Enhancement of polypyrrole linear actuation with poly(ethylene oxide), Synthetic Metals (2017) 232 1–7. http://doi.org/10.1016/j.synthmet.2017.07.011

 

Põldsalu, M. Harjo, T. Tamm, M. Uibu, A.-L. Peikolainen, R. Kiefer^*, Inkjet-printed hybrid conducting polymer-activated carbon aerogellinear actuators driven in an organic electrolyte, Sensors and Actuators B (2017) 250 44–51. http://doi.org/10.1016/j.snb.2017.04.138

 

Harjo, A. Kesküla, K. Leemets, M. S. Khorram, R. Saar, M. Järvekülg, T. Tamm, R. Kiefer^*, Polypyrrole coatings on gelatin fiber scaffolds: Material and electrochemical characterizations in organic and aqueous electrolyte, Synthetic Metals (2017) 232 25–30. http://doi.org/10.1016/j.synthmet.2017.07.014

 

Kiefer, A. Kesküla, J. G. Martinez, G. Anbarjafari, J. Torop, T. F. Otero, Interpenetrated triple polymeric layer as electrochemomechanical actuator: Solvent influence and diffusion coefficient of counterions, Electrochimica Acta (2017) 230 461–469. http://doi.org/10.1016/j.electacta.2017.01.191

 

2016

Kivilo, Z. Zondaka, A. Kesküla, T. Tamm, R. Kiefer^*, Electro-chemo-mechanical deformation properties of polypyrrole /dodecylbenzenesulfate linear actuators in aqueous and organic electrolyte, RSC advances (2016) 6 96484. http://doi.org/10.1039/c6ra20766a

 

Kiefer, J. G. Martinez, A. Kesküla, G. Anbarjafari, A. Aabloo, T. F. Otero, Polymeric actuators: Solvents tune reaction-driven cation to reaction-driven anion actuation, Sensors and Actuators B (2016) 233 328–336. http://doi.org/10.1016/j.snb.2016.04.090

 

Zondaka, R. Valner, T. Tamm, A. Aabloo, R. Kiefer^*, Carbide-derived-carbon in polypyrrole changing elastic modulus with huge impact to actuation RSC Advances (2016) 6 26380-26385. http://doi.org/10.1039/c6ra01511e

 

Rasti, H. Tasmaz, M. Daneshmand, R. Kiefer, C. Ozcinar, and G. Anbarjafari Satellite Image Enhancement: Systematic Approach for Denoising and Resolution Enhancement, DYNA (Revista dyna ingeniería e industria) (2016) 93 326-329. http://dx.doi.org/10.6036/7676

 

2015

Rasti, H. Haus, H.F. Schlaak, R. Kiefer, and G. Anbarjafari, Dielectric Elastomer Stack Actuator Based Autofocus Fluid Lens, Applied Optics (2015) 54 9976-9980. http://dx.doi.org/10.1364/AO.54.009976

 

Plaado, F. Kaasik, R. Valner, E. Lust, R. Saar, K. Saal, A.-L. Peikolainen, A. Aabloo, R. Kiefer^*, Electrochemical actuation of multiwall carbon nanotube fiber with embedded carbide derived carbon particles, Carbon (2015) 94 911–918. http://dx.doi.org/10.1016/j.carbon.2015.07.077

 

Aydemir, P. A. Kilmartin, J. Travas-Sejdic, A. Kesküla, A.-L. Peikolainen, J. Parcell, M. Harjo, A. Aabloo, R. Kiefer^*, Electrolyte and solvent effects in PPy/DBS linear actuators, Sensors and Actuators B, (2015) 216 24–32. http://dx.doi.org/10.1016/j.snb.2015.03.098

 

2014

Kiefer^*, N. Aydemir, J. Torop; T. Tamm, R. Temmer, J. Travas-Sejdic, I. Must; F. Kaasik, A. Aabloo, Carbide-derived carbon as active interlayer of polypyrrole tri-layer linear actuator Sensors & Actuators: B. Chemical (2014) 201 100-106. http://dx.doi.org/10.1016/j.snb.2014.04.093

 

Kiefer, R. Temmer, N. Aydemir, J. Travas-Sejdic, A. Aabloo, T. Tamm, Electrochemistry of interlayer supported polypyrrole tri-layer linear actuators "Electrochimica Acta (2014) 122 322 – 328. http://dx.doi.org/10.1016/j.electacta.2013.10.043

 

Kilmartin, J. Travas-Sejdic, R. Temmer, T. Tamm, A. Aabloo, R. Kiefer^*, PEDOT-PSS/MWCNT coatings on PET for conducting polymer actuators, International Journal of Nanotechnology (2014) 11(5-8) 477 – 485. DOI: 10.1504/IJNT.2014.060568

 

Kiefer^*, R-J. Lee, R. Temmer, T. Tamm, A. Aabloo, Chitosan combined with Conducting Polymers for Novel Functionality: Antioxidant and Antibacterial Activity, Key Engineering Materials (2014) 605 428 – 431. https://doi.org/10.4028/www.scientific.net/KEM.605.428

 

2013

Temmer, R. Kiefer, A. Aabloo, T. Tamm, Direct chemical synthesis of pristine polypyrrole hydrogels and derived aerogels for high power density energy storage applications, Journal of Materials Chemistry A (2013) 48 15216-15219. https://doi.org/10.1039/C3TA13517A

 

Kiefer^*, D.G. Weis, A. Aabloo, G. Urban, J. Heinze, Dependence of polypyrrole bilayer deflection upon polymerization potential, Synthetic Metals (2013) 172 37–43. http://dx.doi.org/10.1016/j.synthmet.2013.04.003

 

Kiefer^*, R. Temmer, T. Tamm, J. Travas-Sejdic, P. A. Kilmartin, A. Aabloo, Conducting polymer actuators formed on MWCNT and PEDOT-PSS conductive coatings, Synthetic Metals (2013) 171 69–75. http://dx.doi.org/10.1016/j.synthmet.2013.03.017

 

R.-J. Lee, R. Temmer, T. Tamm, A. Aabloo, R. Kiefer^*, Renewable antioxidant properties of suspensible chitosan-polypyrrole composites, Reactive and Functional Polymers (2013) 73 (8) 1072–1077. http://dx.doi.org/10.1016/j.reactfunctpolym.2013.04.003

 

R.-Jay Lee, T. Tamm, R. Temmer, A. Aabloo, R. Kiefer^*, Two formation mechanisms and renewable antioxidant properties of suspensible chitosan–PPy and chitosan–PPy–BTDA composites, Synthetic Metals (2013) 164 6-11. http://dx.doi.org/10.1016/j.reactfunctpolym.2013.04.003

 

2007-2010

Kiefer, G. A. Bowmaker, P. A. Kilmartin, J. Travas-Sejdic, Effect of polymerization potential on the actuation of free standing poly-3,4-ethylenedioxythiophene films in a propylene carbonate electrolyte, Electrochim. Acta (2010) 55 681-688. https://doi.org/10.1016/j.electacta.2009.09.034

 

Kiefer, G. A. Bowmaker, R. P. Cooney, P. A. Kilmartin, J. Travas-Sejdic, Cation driven actuation for free standing PEDOT films prepared from propylene carbonate electrolyte containing TBACF3SO3, Electrochim. Acta (2008) 53 2593-2599. https://doi.org/10.1016/j.electacta.2007.10.033

 

Kiefer, P. A. Kilmartin, G. A. Bowmaker, R. P. Cooney, J. Travas-Sejdic, Actuation of polypyrrole films in propylene carbonate electrolytes, Sens. Actuator B (2007) 125 628-634. https://doi.org/10.1016/j.snb.2007.03.008

 

Kiefer^*, D. G. Weis, J. Travas-Sejdic, G. A. Urban, J. Heinze, Effect of electrochemical synthesis conditions on deflection of PEDOT bilayers. Sens.Actuators B (2007) 123 379-383. https://doi.org/10.1016/j.snb.2006.08.039

 

Kiefer, S. Y. Chu, P. A. Kilmartin, G. A. Bowmaker, R. P. Cooney, J. Travas-Sejdic, Mixed-ion linear actuation behaviour of polypyrrole. Electrochim. Acta (2007) 52 2386-2391. https://doi.org/10.1016/j.electacta.2006.08.058