Personal Details

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Dr. PUNIREDD Sreenivasa Reddy

Scientist II


Nanofabrication (NFB) Department

+65 6319 4754

2 Fusionopolis Way, Innovis, #08-03,
Singapore 138634

Research Details

  • Supercritical Carbon dioxide(SCCO2) Extraction of Essential Oils, Botanicals and other Natural Products

  • Polymer  Foams, impregnation, dyeing in SCCO2

  • 3D polymeric foam printing and infusion of drug into 3D porous implants in SCCO2 and precision cleaning of structures with SCCO2

  • Expertise in infusion of metal /metal oxide, ceramic, CNT/graphene oxide and other particles into the polymer/porous structures in SCCO2 and also supercritical blending of additives into polymers for various industrial applications

  • Food Drying in SCCO2

  • Surface/ Interface Chemistry and Self-Assembled Monolayers  in Supercritical Carbon dioxide(SCCO2)

  • Molecular Electronics

  • Solution Processing of Organic Semiconductor Materials

  • Anti-Fouling Materials

  • Super Hydrophobic Coatings

  • Bio-Interfaces

  • Volatile Organic Compounds (VOCs) Sensors

  • Material Synthesis, Processing and Extraction in Super Critical Carbon dioxide(SCCO2)

  • Surface Science/Engineering/Chemistry/Characterization and Polymer Processing in SCCO2

  • Covalent Molecular and Layer-by-Layer Assembly

  • Surface Coatings and Nanostructured Thin Films

  • Characterization of Thin films

  • Structural Investigation of Organic Semiconducting Materials

  • Organic Filed Effect Transistors


  • PHAROS-Advanced Surfaces
  • Grafting of thiol monolayer on silicon using supercritical carbon dioxide as a solvent
  • Characterization of the natural form of Dengue protease in cell membrane-mimicking systems to provide a tool to develop Dengue protease inhibitors
  • “Graphene as Protection Layer for Organics in Metal-Organic Hybrid
  • Innovative Marine Antifouling Solutions for high value application (IMAS)

July 2012 – present

Scientist, IMRE

Nov 2010 – June 2012

Research Associate-Max-Planck Institute for Polymer Research-Mainz-Germany

Sept 2007 – Oct 2010

Marie Curie Experienced Researcher-Technion-Israel Institute of Technology-Haifa-Israel

Jan 2003 - August 2007

Post Graduate Research Scholar - CHBE-NUS

  • Ph.D. (Chemical and Biomolecular Engineering), National University of Singapore, Singapore, 2007
  • B.Tech. (Chemical Engineering), National Institute of Technology-Warangal (NITW)-India, 2002
  • Marie Curie Fellowship (2007 - 2010)-Marie Curie Excellence Grant of the European Commision's FP6 program
  • NUS Research Scholarship (2003-2007)
  • Member of AICHE (American Institute of Chemical Engineers) (2005-Present).
  • Member of Material Research Society (MRS), Singapore (2005-Present).
  • Member of Marie Curie Fellows Association (2007- 2011).
  • Served as a co-chair for the session titled as "Materials Synthesis and Processing with Compressed or Supercritical Fluids" in American Institute of Chemical Engineers (AICHE) Annual Meeting-2014, held in Atlanta-GA-USA from 16-21st November 2014.
  • Serving as a reviewer for Nano Letters, Advanced Functional Materials, ACS Applied Materials and Interfaces, Journal of Colloid and Interface Science Langmuir, Journal of Applied Polymer Science, Chemistry Central Journal, Hybrid Materials and others.

Book Chapters: 

o S. R. Puniredd, W. Pisula and K. Müllen "Influence of film morphology on optical electronic properties of organic materials”Handbook of organic materials for optical and (opto) electronic devices: Properties and applications, PART 1: Materials for Organic (Opto) Electronics and Nonlinear Optics Structure-Property Relations, Publisher: Wood head Publishing Series in Electronic and Optical Materials No. 39, Editors: O Ostroverkhova, pp.83-101, 2013,DOI:10.1533/9780857098764.1.83 ISBN: 978-0-85709-876-4. 

 o S. R. Puniredd, S. Jayaraman and M. P. Srinivasan “Dendrimer-Based Nanostructured Ultrathin Films Formed by Covalent Molecular Assembly in Supercritical Carbon Dioxide” Dendrimers: Synthesis, Applications and Role in Nanotechnology“Publishers:Nova Science Publishers, Inc Editors:Heather B. Harris and Brian L. Turner, pp.1-52, 2013,ISBN: 978-1-62808-605-8. 

 o S. R. Puniredd, F. Zhang, Z. Jia,S. H. Yeong and M. P. Srinivasan “Molecular Assembly of Polyimides and Oligoimides with Direct Covalent Bonding: A Pathway to Robust Structures” Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Edition: CRC PRESS, Editors: K.L. Mittal, pp.215-260, 2007,DOI:10.1163/ej.9789067644549.i-425.48 ISBN: 9789047420989.

Selected Publications

Supercritical carbon dioxide (SCCO2):

- B. Bhartia, S.R Puniredd , S. Jayaraman, C. Gandhimathi, M. Sharma, Y-C Kuo, C-H Chen, J. R. Venugopal, C. Troadec and M.P. Srinivasan, “Highly stable bonding of thiol monolayers to Hydrogen-Terminated Si via supercritical carbon dioxide: Towards a super hydrophobic and bio-resistant surface” ACS Applied Materials & Interfaces, 2016, 8, 37, 24933-24945


- P. Reynaud, A. Thuaire, D Sordes, C. Rauer, J.M. Hartmann, H. Moriceau, B. Bhartia, S.R. Puniredd, C. Troadec, M.P. Srinivasan, X. Baillin, and S. CheramyNanopackaging solution from clean room to UHV Environment: Hydrogen Passivated Si (100) Substrate Fabrication and Use for Atomic Scale Investigations and Self-Assembled Monolayer GraftingProcedia Engineering, 2016, 141, 121-129.  


- B. Bhartia, N. Bacher, S. Jayaraman, S. Khatib, J. Song, S. Guo, C. Troadec, S.R Puniredd, M.P. Srinivasan and H.Haick,“Application of Organophosphonic Acids by One-Step Supercritical CO2 on 1D and 2D Semiconductors: Towards Enhanced Electrical and Sensing Performances” ACS Applied Materials & Interfaces, 2015,7, 14885-14895.


- S.R. Puniredd, S. Jayaraman, C. Gandhimathi, S. Ramakrishna,J. R. Venugopal, T. W. Yeo, S. Guo, R. Quintana, D. D Jańczewski and M.P. Srinivasan, “Deposition of zwitterionic polymer brushes in a dense gas medium” Journal of Colloid and Interface Science, 2015, 448, 156-162.


- S. R. Puniredd, S. Jayaraman, S. H. Yeong, C. Troadec, M. P. Srinivasan "Stable Organic Monolayers on Oxide-Free Silicon/Germanium in Supercritical Medium: A New Route to Molecule Electronics" Journal of Physical Chemistry Letters, 2013, 4, 1397-1403.


- S R. Puniredd, S. Jayaraman, R.K. Gupta, S. H. Yeong, F.Zhang, J.Jia and M. P. Srinivasan, “Nanofabrication By Covalent Molecular Assembly: A Pathway To Robust Structures” COSMOS, 2011, 7,31-42.


- S. R. Puniredd, C. C. N. Bellamy and M. P. Srinivasan “Covalent Molecular Assembly in Supercritical Carbon Dioxide: Formation of Nanoparticles in Immobilized Dendrimers within a Porous Silica Gel Matrix" Journal of Colloid and Interface Science, 2009, 333, 679-683.


- S. R. Puniredd, M. Y. Chan, H. S. Yeong, P. S. Lee and M. P. Srinivasan “Dendrimer-encapsulated Pt Nanoparticles in Supercritical Medium: Synthesis Characterization, and Application to Device Fabrication”Journal of Colloid and Interface Science, 2009, 332, 505-510.


- S. R. Puniredd, W. Seah and M. P. Srinivasan “Pd-Pt and Fe-Ni Nanoparticles Formed by Covalent Molecular Assembly in Supercritical Carbon Dioxide” Journal of Colloid and Interface Science, 2008, 320, 333-340.


- S. R. Puniredd, Yong Keng Wei, M. P. Srinivasan, N. Satyanarayana, and Sujeet K. Sinha “Tribological Properties of Nanoparticle-laden Ultrathin Films Formed by Covalent Molecular Assembly” Langmuir, 2007, 23, 8299-8303.


- S. R. Puniredd and M. P. Srinivasan “Covalent Molecular Assembly of Dendrimer-encapsulated Nanoparticles in Liquid Solvent and Supercritical Medium” Industrial & Engineering Chemistry Research, 2007, 46, 464−471.


- S. R. Puniredd and M. P. Srinivasan “Covalent Molecular Assembly of Multilayer Dendrimer Ultrathin Films in Supercritical Medium”Journal of Colloid and Interface Science, 2007, 306, 118−127.


- S. R. Puniredd, F. Zhang, Z. Jia, M. P. Srinivasan “Molecular assembly of materials with covalent bonding:Path to robust structures”Materials Science and Engineering B, 2006, 132, 43−47.


- S. R. Puniredd and M. P. Srinivasan “Covalent Molecular Assembly in Supercritical Carbon dioxide: A Comparative Study between Amine- and Anhydride-derivatised Surfaces" Langmuir, 2006, 22, 4092−4099.


- S. R. Puniredd and M. P. Srinivasan “Covalent Molecular Assembly of Oligoimide Ultrathin Films in Supercritical and Liquid Solvent Media” Langmuir, 2005, 21, 7812-7822.

Surface Chemistry of oxide free Semiconductors and Molecular Electronics:

- O. Yaffe,Y.Qi, L. Segv, L. Scheres , S. R. Puniredd, T. Ely, H. Haick, L. Kronik, H. Haick, H. Zuilhof,L. Kronick,A. Kahn, A. Vilan and D. Cahen ”Charge Transport across Metal/Molecular (alkyl) Monolayer-Si junctions is dominated by the LUMO level” Physical Review B, 2012, 85,045433.

- S. R. Puniredd, O. Assad T. Stelzner, S. Christiansen and H. Haick “Catalyst-Free Functionalization for Versatile Modification of Nonoxidized Silicon Structures” Langmuir, 2011, 27, 4764-4771.

- S. R. Puniredd, I. Platzman, R. Tung and H. Haick, “Bi-Directional Control of Silicon Surface Potential by Means of Molecular Coverage" Journal of Physical Chemistry C, 2010, 114, 18674-18678.


- O. Yaffe, L. Scheres , S. R. Puniredd , N. Stein, A. Biller, R. Har Lavan, H. Shpaisman, H. Zuilhof, H. Haick, D. Cahen and A. Vilan”Molecular Electronics at Metal / Semiconductor Junctions: Si Inversion by Sub-nm Molecular Films” Nano Letters, 2009, 9, 2390-2394.


- M. Y Bashouti, Y. Paska, S. R. Puniredd, T. Stelzner, S. Christiansen, H. Haick "Silicon nanowires terminated with methyl functionalities exhibit stronger Si–C bonds than equivalent 2D surfaces” Phys. Chem. Chem. Phys, 2009, 11, 3845-3848.


- O. Assad, S. R. Puniredd, T. Stelzner, S. Christiansen andH. Haick “Stable Scaffolds for Reacting Si Nanowires with Further Organic Functionalities while Preserving Si-C Passivation of Surface Sites” Journal of the American Chemical Society, 2008, 130, 17670-17671.


- S. R. Puniredd, O. Assad and H. Haick “Highly Stable Organic Monolayers for Reacting Silicon for Further Functionalities; The Effect of C-C bond Nearby the Silicon Surface” Journal of the American Chemical Society, 2008, 130, 13727-13734.


- S. R. Puniredd, O. Assad and H. Haick “ Highly Stable Organic Modification of Si(111) Surfaces: Towards Reacting Si with Further Functionalities while Preserving the Desirable Chemical Properties of Full Si-C atop site terminations” Journal of The American Chemical Society, 2008,130, 9184-9185.

 Antifouling Materials:        

- V. A. Vasantha,   S. Z. Z. Rahim,S. Jayaraman  G. H. Junyuan,  S. R. Puniredd,  S. Ramakrishna, S. L-M Teo and   A. Parthiban, “Antibacterial, electrospun nanofibers of novel poly(sulfobetaine) and poly(sulfabetaine)s” Journal of Materials Chemistry B, 2016,4, 2731-2738.


- X. Zhu, D. Jańczewski, S. Guo, S.S.C. Lee, F.J. Parra Velandia, S.L.M. Teo, T. He, S.R Puniredd, and G. J. Vansco, “Polyion multilayers with precise surface charge control for antifouling” ACS Applied Materials & Interfaces, 2015,7, 852-861.


- S.R Puniredd, D Jańczewski, D.P Go, X Zhu, S. Guo, S.L.M Teo, S.S.C Lee, and G. J. Vansco, “Imprinting of metal receptors into multilayer polyelectrolyte films: fabrication and applications in marine antifouling” Chemical Science, 2015,6, 372-383.


- S. Guo, S. R. Puniredd, D. Jańczewski, S. S. C. Lee, S. L. M. Teo, T. He, X. Zhu, G. J. Vancso “Barnacle larvae exploring surfaces with variable hydrophilicity: Influence of morphology and adhesion of “footprint” proteins by AFM” ACS Applied Materials & Interfaces2014, 6, 13667-13676.


Organic Electronics, Graphene, OFETs, Structure Property Investigations of Organic Semiconductor Materials and Sensors:

- B. Wang, T-P Huynh, W. Wu, N. Hayek, T. T. Do, J. C. Cancilla, J. S. Torrecilla, M. M. Nahid, J. M. Colwell, O. M. Gazit, S. R. Puniredd, C. R. McNeill, P. Sonar, and H. Haick ”A Highly Sensitive Diketopyrrolopyrrole-Based Ambipolar Transistor for Selective Detection and Discrimination of Xylene IsomersAdvanced Materials, 2016,28, 4012-4018. (Journal Cover Image Featured)

- R.Stadler, S. R. Puniredd, M. R. Hansen, U. Koldemir, C. Grand, W. Zajaczkowski, K. Müllen, W. Pisula, and J. R. Reynolds, ”Ambipolar Charge Transport in Isoindigo-Based Donor–Acceptor Polymers Chemistry of Materials, 2016, 28,  1286–1297. (According to the Chem. Mater, this article has been listed in top-10 most read articles category in March, 2016).

- U. Koldemir, S. R. Puniredd, M. Wagner, S. Tongay, T.D.McCarley, G. D. Kamenov, K. Müllen, W. Pisula, J. R. Reynolds, “End Capping Does Matter: Enhanced Order and Charge Transport in Conjugated Donal-Acceptor Polymers” Macromolecules2015,48, 6369-6377. (According to the Macromolecules, this article has been listed in top-10 most read articles category in September 2015).


- C. An, T. Marszalek, X. Guo, S.R. Puniredd, M. Wagner, W. Pisula, and M. Baumgarten, “Tuning Optoelectronic Properties of Dual-Acceptor Based Low-Bandgap Ambipolar Polymers by Thiophene-Bridge Length” Polymer Chemistry, 2015,6, 6238-6245.


- S. Zhou, C. An, T. Stelzig, S.R Puniredd, X. Guo, W. Pisula, and M. Baumgarten,” Strengthening the acceptor properties of thiadiazoloquinoxalines via planarization” New Journal of Chemistry, 2015,39, 6765-6770.


- G. Battagliarin S. R. Puniredd, S. Stappert, W. Zajaczkowski, S. Wang, C. Li, W. Pisula, K. Müllen, “Ortho- vs Bay-Functionalization: a Comparative Study on Tetracyano-Terrylenediimides" Advanced Functional Materials, 2014,24, 7530-7537.


- F. Hinkel, T. Marszalek, W. Zajaczkowski, S. R. Puniredd, M. Baumgarten, W. Pisula, and K. Müllen, “Tuning packing and solubility of donor (D) - acceptor (A) polymers by cis-trans-isomerization within alkenyl side chains” Chemistry of Materials, 2014, 26, 4844–4848.


- X.Guo, S. R. Puniredd, B. He, T. Marszalek, M. Baumgarten, W. Pisula, and K. Mullen, “Combination of Two Diketopyrrolopyrrole Isomers in One Polymer for Ambipolar Transport” Chemistry of Materials, 2014, 26, 3595–3598. (According to the Chem. Mater, this article has been listed in top-10 most read articles category in July 2014).


- C.An, S.R.Puniredd, X.Guo,T. Stelzig, Y. Zhao, W.Pisula, and M. Baumgarten "Benzodithiophene–Thiadiazoloquinoxaline as an Acceptor for Ambipolar Copolymers with Deep LUMO Level and Distinct Linkage Pattern” Macromolecules, 2014,47, 979-986.


- L, Chen , K.S. Mali, S. R. Puniredd, M. Baumgarten , K. Parvez, W. Pisula , S. D. Feyter and K. Mullen “Assembly and Fiber Formation of a Gemini-type-Hexathienocoronene Amphiphile for Electric Conduction” Journal of the American Chemical Society, 2013, 135, 13531-13537.


- W.W. H. Wong, J. Subbiah, S. R. Puniredd, W. Pisula, D. J. Jones and A. B. Holmes “Benzotriazole-based donor-acceptor conjugated polymers with broadened absorption in the visible” Polymer Chemistry 2014, 5, 1258-1263.


- M.Pfaff, M. Müller, P. Bockstaller, E. Müller, J. Subbiah, W. W. H. Wong,M. F. G.Klein, A. Kiersnowski, S. R. Puniredd , W. Pisula, A. Colsmann, D. Gerthsen, and D. J. Jones “Bulk Heterojunction Nanomorphology of Fluorenyl Hexa-peri-hexabenzocoronene–Fullerene Blend Films ” ACS Applied Materials & Interfaces 2013,5, 11554-11562.


- X.Guo, S. R. Puniredd, M. Baumgarten , W. Pisula, and K. Mullen “Rational Design of Benzotrithiophene-Diketopyrrolopyrrole-Containing Donor-Acceptor Polymers for Improved Charge Carrier Transport” Advanced Materials, 2013, 38, 5467-5472.


- J.Shu, D.Dudenko, M.Esmaeili, J.H.Park, S.R Puniredd, J.Y.Chang, D. W.Breiby, W.Pisula, M.R.Hansen, “Coexistence of Helical Morphologies in Columnar Stacks of Star-Shaped Discotic Hydrazones “Journal of the American Chemical Society, 2013, 135,11075-11086.


- W. Pisula, N. Tsao, Don M. Cho, D.Dudenko S. R. Puniredd, Y. Zhao, A. Mavirinsky, J.Shu, M.R.Hansen, M.Baumgarten and K. Müllen“Solid-State Organization and Ambipolar Field-Effect Transistors of Benzothiadiazole-Cyclopentadithiophene Copolymer with Long Branched Alkyl Side Chains“ Polymers,2013, 5(2), 833-846.


- K. Parvez, R. Li, S.R. Puniredd, Y.Hernandez,H, Felix, S. Wang, X, Feng, K. Mullen “Electrochemically Exfoliated Graphene as Solution-Processable,Highly-Conductive Electrodes for Organic Electronics" ACS Nano,2013,7, 3598-3606.


- S. R. Puniredd, A. Kiersnowski,Glauco Battagliarin, W. Zajaczkowski, W.W.H Wong, N. Kirby, W. Pisula, K. Müllen ”Polythiophene - Perylene Diimide Heterojunction Field-Effect Transistors” Journal of Materials Chemistry C ,2013,1,2433-2440.


- L, Chen , S. R. Puniredd , Y-Z Tan , M. Baumgarten , U. Zschieschang , V. Enkelmann , W. Pisula , X. Feng , H. Klauk , and K. Mullen “Hexathienocoronene: Synthesis and Self-Organization" Journal of the American Chemical Society, 2012,134,17869-17872.


- W. W. H. Wong, J. Subbiah, S. R. Puniredd, B Purushothaman,W. Pisula, N. Kirby, K. Müllen, D. J. Jones, and A. B. Holmes,"Columnar hexa-peri-hexabenzocoronene-diketopyrrolopyrrole organic dyes" Journal of Materials Chemistry, 2012, 22,21131-21137. (According to the Journal of Materials Chemistry, this paper has been listed in top-10 most read articles category).


- A. Lv, S. R. Puniredd, J. Zhang, Z. Li, H. Zhu, W. Jiang, H. Dong, Y. He, L. Jiang, Y.Li, W. Pisula, Q. Meng, W. Hu, Z. Wang, “High Mobility, Air Stable, Organic Single Crystal Transistors of an nType Diperylene Bisimide" Advanced Materials, 2012, 24, 2626-2630. (Wiley website has highlighted this article under the category of hot topics in organic electronics).


- X.Guo, S. R. Puniredd , M. Baumgarten , W. Pisula, and K. Mullen “Benzotrithiophene-Based Donor–Acceptor Copolymers with Distinct Supramolecular Organizations” Journal of the American Chemical Society, 2012,134,8404-8407.


- L. Arnold, S. R. Puniredd, C. V. Malotki, W. Pisula, M. Baumgarten, M. Wagner and K. Müllen "Fused π-Extended Discotic Triangular Porphyrinoids" Journal of Porphyrins and Phthalocyanines, 2012, 5,564-575.


- L. Zöphel, K. S. Mali, S. R. Puniredd, M. Wagner, S. D. Feyter, R. Rieger,W. Pisula and K. Müllen "4, 5Pyrenocyanine-Just Another Phthalocyanine? A STM and 2D WAXS Study" Chemistry: A European Journal, 2012, 18, 3264-3276.

  • S. R. Puniredd, S. Jayaraman and M. P. Srinivasan “Stable Organic Monolyaers on Oxide and Oxide-free Si/Ge in Supercritical Medium: A New Route to Molecular Electronics” US PA #62/117,744.

Last updated on : 08 Apr 2019 08:16 AM