GRADECAK Silvija

Silvija Gradečak-Garaj is a Professor of Materials Science and Engineering at NUS, where she founded a University-level Center for Electron Microscopy and Materials Characterization Laboratory. Since 2020, she has been the lead PI and co-Director of the Applied Materials-NUS Advanced Materials Corporate Lab. From 2019-2020, she also served as a Director within the Office of a Deputy President for Research and Technology at NUS.

Prof. Gradečak started her academic career in 2006 at MIT, Department of Materials Science and Engineering, and reached Full Professorship in 2017. She obtained her M.S. and PhD in Physics from the University of Zagreb and the Swiss Federal Institute of Technology in Lausanne, respectively. In 2003, she was awarded the Swiss National Science Foundation Fellowship for Prospective Researchers and spent two years as a Postdoctoral Research Fellow at Harvard University, Department of Chemistry and Chemical Biology.

Prof. Gradečak is a member of the NUS Graduate School of Integrative Sciences & Engineering and was a PI within the Low Energy Electronics Interdisciplinary Research Program under the SMART centre of CREATE Singapore.

Prof. Gradečak is a recipient of the NSF CAREER Award, 3M Innovation Award, Inaugural 2012 Nano Letters Young Investigator Lectureship, and MIT Graduate Materials Council Outstanding Teaching Award, among others.

Research Interests

Selected Publications

1. J. Chung, L. Zhang, G. SyaranamualS. Gradečak, M. Bosman, “Atomic-Scale Characterization of Extended Defects in Wurtzite GaN Heterostructures”, ACS Applied Nano Materials (accepted).

2. . Y. Lee, S. Sarkar, K. Reidy, A. Kumar, J. Klein, K. Watanabe, T. Taniguchi, J. M. LeBeau, F. M. Ross, S. Gradečak, “Strong and Localized Luminescence from Interface Bubbles Between Stacked hBN Multilayers”, Nature Communications, 13, Article number: 5000 (2022).
   Featured as an Editor’ Highlight for Nature Communications

3. S. Srivastava, K. E. Lee, E. A. Fitzgerald, and S. Gradečak “Freestanding High-Resolution Quantum Dot Color Converters with Small Pixel Sizes”, ACS Appl. Mater. Interfaces, (43) 48995–49002 (2022).

4. J. Chung, Z. Li, S. Goodman, J. So, G. J. Syaranamual, T. P. Mishra, E. A. Fitzgerald, M. Bosman, K. Lee, S. J. Pennycook, S. Gradečak “Light-Emitting V-Pits: An Alternative Approach Towards Efficient Long-Wavelengths InGaN Quantum Dots”, ACS Photonics 2021, 8, 2853–2860 (2021).
   Journal cover page (supplementary). The paper received >70 pieces of coverage across a mix of trade publications, tech-focused news sites, and general science media.

5. H. Y. Lee, M. AlEzzi N. Raghuvanshi, J. Y. Chung, K. Watanabe, T. Taniguchi, S. Garaj, S. Adam, and S. Gradečak, “Tunable moire luminescence in hexagonal boron nitride controlled by the interface twist angle” Nano Letters, 7, 2832 (2021).
   Journal cover page (supplementary). The paper received >70 pieces of coverage, including university news coverage, leading science and research publications, and international trade publications

6. N. Bonnet, H. Y. Lee, F. Shao, S. Y. Woo, J. Blazit, K. Watanabe, T. Taniguchi, A. Zobelli, O. Stéphan, M. Kociak, S. Gradečak*, L. H. G. Tizei*, “Nanoscale modification of WS2 trion emission by its local electromagnetic environment“, Nano Letters, (24,) 10178 (2021). *corresponding authors

7. T P. Mishra, G. J. Syaranamual, Z. Deng, J. Chung, L. Zhang, S. A. Goodman, L. Jones, M. Bosman, S. Gradečak, S. J. Pennycook, and P. Canepa “Unlocking the origin of compositional fluctuations in InGaN light emitting diodes”, Phys. Rev. Materials , 024605 (2021).

8. B. Wang, G. Joannesha Syaranamual, K. H. Lee, S. Bao, Y. Wang, K. Lee, E. Fitzgerald, S. Pennycook, S. Gradecak, J. Michel, Jurgen, “Effectiveness of InGaAs/GaAs superlattice dislocation filter layers epitaxially grown on 200 mm Si wafers with and without Ge buffers”, Semiconductor Science and Technology, 35, 095036 (2020).

9. A. Singh, H. Y. Lee, S. Gradečak, “Direct optical-structure correlation in atomically thin dichalcogenides and heterostructures”, Nano Research, 13 (5), 1363-1368 (2020).

10. J. A. Ke, S. Garaj, S. Gradečak, “Nanopores in 2D MoS2: defect-mediated formation and density modulation”, ACS Applied Materials and Interfaces 11, 26228 (2019).

11. A. Krayev, C. S. Bailey, K. Jo, S. Wang, A. Singh, T. Darlington, G. Y. Liu, S. Gradečak, P. J. Schuck, E. Pop, D. Jariwala, “Dry transfer of van der Waals crystals to noble metal surfaces to enable characterization of buried interfaces”, ACS Applied Materials and Interfaces 41, 38218 (2019).

12. O. Hentz, A. Singh, Z. Zhao, S. Gradečak “A method of visualizing non-radiative mobile defects in organic-inorganic perovskite materials”, Small Methods 3, 1900110 (2019).

13. M. Tavakoli, H. Dastjerdi, J. Y. Zhao, K. E. Shulenberger, C. Carbonera, R. Po, A. Cominetti, G. Bianchi, N. K. Klein, M. G. Bawendi, S. Gradečak, J. Kong, “Light management in organic photovoltaics processed in ambient conditions using ZnO nanowire and antireflection layer with nanocone array”, Small 15, 1900508 (2019).

14. Z. Zhao, A. Singh, J. Chesin, R. Armitage, I. Wildeson, P. Deb, A. Armstrong, K. Kisslinger, E. A. Stach, S. Gradečak, “Cathodoluminescence as an effective probe of carrier transport and deep level defects in droop-mitigating InGaN/GaN quantum well heterostructures” Applied Physics Express 12, 034003 (2019).

15. J. P. Hanson, A. Bagri, J. Lind, P. Kenesei, R. M. Suter, S. Gradečak, M.J. Demkowicz, “Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725”, Nature Communications , 3386 (2018).

16. K. Bogaert, S. Liu, T. Liu, N. Guo, C. Zhang, S. Gradečak, S. Garaj, “Two-dimensional MoW1-xS2 graded alloys”, Scientific Reports , 12889 (2018).

17. O. Hentz, P. Rekemeyer, and S. Gradečak “Effects of voltage biasing on current extraction in perovskite solar cells”, Advanced Energy Materials , 1701378 (2018).

18. J. J. Cheng, C. H. M. Chuang, O. Hentz, P. H. Rekemeyer, M. G. Bawendi, S. Gradečak, “Dimension- and surface-tailored ZnO nanowires enhance charge collection in quantum dot photovoltaic devices”, ACS Applied Energy Materials , 1815 (2018).

19. A. Kadir, S. Srivastava, Z. Li, K. E. K. Lee, W. A. Sasangka, S. Gradečak, S. J. Chua, E. A. Fitzgerald, “Influence of substrate nitridation on the threading dislocation density of GaN grown on 200 mm Si (111) substrate”, Thin Solid Films , 73 (2018).

20. P. H. Rekemeyer, C. H. M. Chuang, M.G. Bawendi, S. Gradečak, “Minority carrier transport in lead sulfide quantum dot photovoltaics”, Nano Letters , 6221 (2017).

21. X. X. Wang, S. Ermez, H. Gotkas, S. Gradečak, K. Gleason, “Room temperature sensing achieved by GaAs nanowires and oCVD polymer coating”, Macromolecular Rapid Communications 38, 1700055 (2017).

22. M. Seita, J.P. Hanson, S. Gradečak, M.J. Demkowicz, “Probabilistic failure criteria for individual microstructural elements: an application to hydrogen-assisted crack initiation in alloy 725”, Journal of Materials Science , 2763 (2017).

23. A. Bagri, J.P. Hanson, J. Lind, P. Kenesei, R. M. Suter, S. Gradečak, M.J. Demkowicz, “Grain boundary character distributions in Ni-base alloy 725 using high-energy diffraction microscopy”, Metallurgical and Materials Transactions A , 354 (2017).

24. K. Bogaert, S. Liu, S. Gradečak, S. Garaj, “Diffusion-mediated synthesis of MoS2/WS2 lateral heterostructures”, Nano Letters 16, 5129 (2016).

25. P. H. Rekemeyer, S. Chang, C.-H. Chuang, G. W. Hwang, M. G. Bawendi, S. Gradečak, “Enhanced photocurrent in PbS quantum dot photovoltaics via ZnO nanowires and band alignment engineering”, Advanced Energy Materials 6, 1600848 (2016).

26. V. Steinmann, R. Chakraborty, P. H.  Rekemeyer, K. Hartman, R. E. Brandt, A. Polizzotti, C. Yang, T. Moriarty, S. Gradečak, R. G. Gordon, T. Buonassisi, “A two-step absorber deposition approach to overcome shunt losses in thin film solar cells”, ACS Applied Materials & Interfaces 8, 22664 (2016).

27. W. J. Jo, J. T. Nelson, S. Chang, V. Bulović, S. Gradečak, M. S. Strano, K. K. Gleason “Oxidative chemical vapor deposition of neutral hole transporting polymer for enhanced solar cell efficiency and lifetime”, Advanced Materials , 6399 (2016).

28. O. Hentz, Z. Zhao, and S. Gradečak, ” Impacts of ion segregation on local optical properties in mixed halide perovskite Films “, Nano Letters , 1485 (2016).

29. J. J. Cheng, S. M. Nicaise, K. K. Berggren, and S. Gradečak, “Dimensional tailoring of hydrothermally grown zinc oxide nanowire arrays”, Nano Letters , 753 (2016).

30. S. Chang, G. Ddeul Han, J. G. Weis, H. Park, O. Hentz, Z. Zhao, T. M. Swager, S. Gradečak, “Transition metal oxide free-perovskite solar cells enabled by a new organic charge transport layer”, ACS Applied Materials and Interfaces, 8511–851 (2016).

31. G. Bertoni, F. Fabbri, M. Villani, L. Lazzarini, S. Turner, G. V. Tendeloo, D. Calestani, S. Gradečak, A. Zappetiini, G. Salviati, “Nanoscale maping of plasmon and exciton in ZnO tetrapods coupled with Au nanoparticles”, Scientific Reports , 19168 (2016).

32. M.-Y. Lu, C.-Y. Tsai, H.-A. Chen, Y.-T. Liang, K.-P. Chen, S. Gradečak, S. Gwo, L.-J. Chen, “Plasminic enhancement of Au nanoparticle-embedded single-crystalline nanowire dye-sensitized solar cells”, Nano Energy , 264 (2016).

33. Y. Song, S. Chang, S. Gradečak, J. Kong, “Visibly-transparent organic solar cells on flexible substrates with all-graphene electrodes”, Advanced Energy Materials , 1600847 (2016).

34. B. Franta, D. Pastor, H. H. Gandhi, P. H. Rekemeyer, S.Gradečak, M. J. Aziz, E. Mazur, “Simultaneous high crystallinity and sub-bandgap optical absorptance in hyperdoped black silicon using nanosecond laser annealing”, Journal of Applied Physics 118, , 225303 (2015).

35. S. Joglekar, M. Azize, E. J. Jones, S. Gradečak, T. Palacios, “Impact of Al2O3 passivation on GaN-based high electron mobility transistors”, IEEE Transactions on Electron Devices , 318 (2015).

36. E. J. Jones, S. Ermez, S. Gradečak, “Mapping of strain fields in GaAs/GaAsP core-shell nanowires with nanometer resolution”, Nano Letters 15,, 7873 (2015).

37. F. Fabbri, Y.-T. Lin, G. Bertoni, F. Rossi, M. J. Smith, S Gradečak, E. Mazur, G. Salviati, “Origin of the visible emission of black silicon microstructures”, Applied Physics Letters 107, 021907 (2015).

38. S. Ermez, E. J. Jones, S. C. Crawford, S. Gradečak, “Self-seeded growth of GaAs nanowires by metal-organic chemical vapor deposition”, Crystal Growth & Design , 2768 (2015).

39. S. Crawford, S. Ermez, G. Haberfehlner, E. Jones, S. Gradečak, “Impact of nucleation conditions on diameter modulation of GaAs nanowires”, Nanotechnology 26, 225604 (2015).

40. M. Seita, J.P. Hanson, S. Gradečak†, M.J. Demkowicz†, “’Janus’ grain boundaries: the dual Role of coherent twins in hydrogen embrittlement”, Nature Communications 6, 6164 (2015). (†corresponding authors)

41. X. Zhou, M.-Y. Lu, Yu-J. Lu, E. Jones, S. Gwo, S. Gradečak “Nanoscale optical properties of InGaN/GaN nanodisk-in-rod heterostructures”, ACS Nano 9, 2868–2875 (2015).

42. S. Nicaise, J. Cheng, A. Kiani, S. Gradečak, K. Berggren, “Control of zinc oxide nanowire array properties with electron beam lithography templating for PV applications”, Nanotechnology , 075303 (2015).

43. S. Chang, H. Park, J. Cheng, P. Rekemeyer, S. Gradečak, “Improved efficiency in organic/inorganic hybrid solar cells by interfacial modification of ZnO nanowires with small molecules”, Journal of Physics D 394016 (2014).

44. H. Park, S. Chang, X. Zhou, J. Kong, T. Palacios, S. Gradečak, “Flexible graphene elctrode-based organic photovoltaics with record-high efficiency”, Nano Letters , 5148-5154 (2014).

45. M.Y. Lu, X. Zhou, C.Y. Chiu, S. Crawford, S. Gradečak, “From GaN to ZnGa2O4 through a low temperature process: nanotube and heterostructure arrays”, ACS Applied Materials and Interfaces 6, 882-887 (2014)

46. J. Chesin, S. Gradečak, “Comparing directed efficiency of III-nitride nanowire light emitting diodes”, Journal of Nanophotonics , 083095(1-13) (2014).

47. J. M. Warrender, J. Mathews, D. Recht, M. Smith, S. Gradečak, M. J. Aziz, M. J. Smith, M.-J. Sher, B. Franta, E. Mazur, S. Gradečak, “Improving dopant incorporation during femtosecond-laser doping of Si with a Se thin-film dopant precursor”, Applied Physics A 114(4), 1009-1016 (2014).

48. E. Jones, D. Cooper, J.-L. Rouviere, A. Béché, M. Azize, T. Palacios, and S. Gradečak, “Towards rapid nanoscale measurement of strain in III-nitride heterostructures”, Applied Physics Letters , 231904 (2013).

49. D. Recht, M. J. Smith, S. Charnvanichborikarn, J. T. Sullivan, M. T. Winkler, J. Mathews, J. M. Warrender, T. Buonassisi, J. S. Williams, S. Gradečak, M. J. Aziz, “Supersaturating silicon with transition metals by ion implantation and pulsed laser melting”, Journal of Applied Physics , 124903 (2013).

50. X. Zhou, M.-Y. Lu, Y.-J. Lu, S. Gwo, and S. Gradečak, “Correlation of doping, structure and carrier dynamics in a single GaN nanorod”, Applied Physics Letters 102, 253104 (2013).

51. A. Gumennik, L. Wei, G. Lestoquoy, A. M. Stolyarov, X. Jia, P. H. Rekemeyer, M. J. Smith, X. Liang, B. Grena, S. G. Johnson, S. Gradečak, A. F. Abouraddy, J. D. Joannopoulos, Y. Fink, “Silicon-in-silica spheres via axial thermal gradient in-fibre capillary instabilities”, Nature Communicatio, 2216 (2013).

52. M. de la Mata, X. Zhou, F. Furtmayr, J. Teubert, S. Gradečak, M. Eickhoff, A. F. i Morral, J. Arbiol, “Bandgap engineering: 0D, 1D and 2D quantum structures in a nanowire”, Journal of Materials Chemistry C , 4300 (2013).

53. K. H. Baloch, A. C. Johnston-Peck, K. Kisslinger, E. A. Stach, S. Gradečak, ” Revisiting the “In-clustering” question in InGaN through the use of aberration-corrected STEM and low-loss EELS below the knock-on threshold “, Applied Physics Letters 102, 191910 (2013).

54. Li. Hu, M. M. Brewster, C. Tang, S. Gradečak, X. Fang, “Heteroepitaxial growth of GaP/ZnS nanocable with superior optoelectronic response”, Nano Letters , 1941 (2013).

55. H. Park, S. Chang, M. Smith, S. Gradečak, J. Kong, “Interface engineering of graphene for universal applications in organic solar cells and organic light emitting diodes”, Sci. Reports , 1581(1-8), 2013.

56. M. S. Wang, J. P. Hanson, S. Gradečak†, M. J. Demkowicz, “Cutting apart of γ” precipitates by dislocations emitted from nanoscale surface notches in Ni-base alloy 725″, Materials Research Letters 1, 77 (2013). (†corresponding author)

57. G. Haberfehlner, M. J. Smith, J.-C. Idrobo, G. Auvert, M.-J. Sher, M. T. Winkler, E. Mazur, N. Gambacorti, S. Gradečak, P. Bleuet, “Dopant segregation in femtosecond laser-doped silicon revealed by electron tomography”, Microscopy and Microanalysis 19, 716 (2013).

58. J. Jean, S. Chang, P. R. Brown, J. J. Cheng, P. H. Rekemeyer, M. G. Bawendi, S. Gradečak, Vladimir Bulovic, “Nanowire arrays for enhanced photocurrent in quantum dot solar cells”, Advanced Materials 25, 2790 (2013).

59. F. Fabbri, M. J. Smith, D. Recht, M. J. Aziz, S. Gradečak†, G. Salviati†, “Depth-resolved cathodoluminescence spectroscopy of silicon supersaturated with sulfur”, Applied Physics Letters 102, 031909(1-5), 2013. (†corresponding authors)

60. H. Park†, S. Chang†, J. Jean, J. J. Cheng, P. T. Araujo, M. Wang, M. Bawendi, M. S. Dresselhaus, V. Bulovic, J. Kong, S. Gradečak, “Graphene cathode-based ZnO nanowire hybrid solar cells”, Nano Letters 13, 233-239 (S1-S4), 2013. (†equally contributed)
    One of the Top 20 Most Read Articles in Nano Letters for January 2013, March and April 2013 and for a 12-month period in April 2013-April 2014.

61. S. Crawford, S. K. Lim, S. Gradečak, “Fundamental insights into nanowire diameter modulation and the liquid/solid interface”, Nano Letters 13, 226-232 (S1-S10), 2013.

62. S. K. Lim†, S. Crawford†, G. Haberfehlner, S. Gradečak, “Controlled modulation of diameter and composition along individual III-V nitride nanowires”, Nano Letters, 331-3366 (S1-S11, video 1, video 2), 2013. (†)
    Selected as the February 2013 Nano Letters Cover Page article.

63. M. J. Smith, M.-J. Sher, B. Franta, Y.-T. Lin, E. Mazur, S. Gradečak, “The origins of pressure-induced phase transformations during the surface texturing of silicon using femtosecond laser irradiation”, Journal of Applied Physics , 083518(1-8), 2012.

64. E. J. Jones, M. Azize, M. J. Smith, T. Palacios, S. Gradečak, “Correlating stress generation and sheet resistance in InAlN/GaN nanoribbon high electron mobility transistors”, Applied Physics Letters , 113101(1-3), 2012.

65. F. Qian, M. Brewster, S. K. Lim, C. Greene, O. Laboutin, J. W. Johnson, S. Gradečak, Y. Cao, Y. Li, “Synthesis and optical studies of AlN/GaN multiple quantum well nanowire structures”, Nano Letters , 3344–3350 (S1-S7), 2012.

66. X. Zhou, J. Chesin, S. Crawford, S. Gradečak, “Using seed particle composition to control structural and optical properties of GaN nanowires”, Nanotechnology , 285603 (1-9), 2012.

67. M. T. Winkler, M.-J. Sher, Y.-T. Lin, M. Smith, H. Zhang, S. Gradečak, E. Mazur, “Studying femtosecond-laser hyperdoping by controlling surface morphology”, Journal of Applied Physics , 093511(1-7), 2012.

68. M. Brewster, X. Zhou, M. Y. Lu, and S. Gradečak, “The interplay of structure and optical properties in individual ZnO nanostructures”, invited review, Nanoscale , 1455-1462, 2012.
    One of the Top 10 most-read Nanoscale articles for 02/2012.

69. S. Ren, M. Bernardi, R. R. Lunt, V. Bulovic, J. C. Grossman, S. Gradečak, “Towards efficient carbon nanotube / P3HT solar cells: active layer morphology, electrical and optical properties”, Nano Letters , 5316-5321 (2011).
    One of the Most Read Articles in Nano Letters for 11/2011.

70. M. Smith, M. Winkler, M.-J. Sher, Y.-T. Lin, E. Mazur, S. Gradečak, “Effects of a thin film dopant precursor on the structure and properties of femtosecond-laser doped silicon”, Applied Physics A 105, 795-800 (2011).

71. M. Azize, O. Saadat, A. Hsu, M. Smith, S. Guo, S. Gradečak, T. Palacios, “High electron mobility transistors based on InAlN/GaN nano-ribbons”, IEEE Electron Device Letters 32, 1680-1682 (2011).

72. S. Ren, L.-Y. Chang, S. K. Lim, J. Zhao, M. Smith, N. Zhao, V. Bulović, M. Bawendi, S. Gradečak, “Inorganic-organic hybrid solar cell: bridging quantum dots to conjugated polymer nanowires”, Nano Letters 11, 3998–4002 (2011).
    One of the Most Read Articles in Nano Letters for September and October 2011, and for a 12-month period in August 2012.

73. M. Smith, Y.-T. Lin, M.-J. Sher, M. Winkler , E. Mazur, S. Gradečak, “Pressure-induced phase transformations during femtosecond-laser doping of silicon”, Journal of Applied Physics 110, 053524 (2011).
    Selected for Virtual Journal of Ultrafast Science, October 2011

74. M. Brewster, M.-Y. Lu, S. K. Lim, M. Smith, X. Zhou, and S. Gradečak, “The Growth and Optical Properties of ZnO Nanowalls”, Journal of Physical Chemistry Letters 2, 1940-1945 (2011).

75. M. Brewster, X. Zhou, S. K. Lim, and S. Gradečak, “Role of Au in the growth and nanoscale optical properties of ZnO nanowires,” Journal of Physical Chemistry Letters 2, 586-591 (2011).

76. S. Ren, N. Zhao, S. Crawford, M. Tambe, V. Bulović, and S. Gradečak, “Heterojunction photovoltaics using GaAs nanowires and conjugated polymers”, Nano Letters 11, 408-413 (2011).

77. M. Tambe, S. Ren, S. Gradečak, “”, Nano Letters , 4584–4589 (2010).

78. S. Ren, S. K. Lim, and S. Gradečak, “Synthesis and thermal responsiveness of self-assembled gold nanoclusters”, Chemical Communications 46, 6246-6248(1-6) (2010).
    Featured as an inner cover article of the 34th issue of the Chemical Communications.

79. S. K. Lim, S. Crawford, and S. Gradečak, “Growth mechanism of GaN nanowires: preferred nucleation site and effect of hydrogen”, Nanotechnology , 345604 (2010).

80. C. H. Tseng, M. J. Tambe, S. K. Lim, M. J. Smith, and S. Gradečak, “Position controlled nanowire growth through Au nanoparticles synthesized by galvanic reaction”, Nanotechnology 21, 165605(1-6), 2010.
    Featured as a Lab Talk Article on nanotechweb.org, April 2010

81. M. Brewster, O. Schimek, S. Reich, and S. Gradečak, “Exciton-phonon coupling in individual GaAs nanowires studied using resonant Raman spectroscopy”, Physical Review B ,201314(R1-4), 2009.
    Selected for Virtual Journal of Nanoscale Science and Technology, December 7, 2009.

82. S. K. Lim, M. Brewster, F. Qian, Y. Li, C. M. Lieber, and S. Gradečak, “Direct correlation between structural and optical properties of III-V nitride nanowire heterostructures with nanoscale resolution”, Nano Letters , 3940–3944, 2009.

83. X. Fang, Y. Bando, U. K. Gautam, T. Zhai, S. Gradečak, D. Golberg “Heterostructures and superlattices in one-dimensional nanoscale semiconductors”, Journal of Materials Chemistry 19, 5683-5689, 2009.

84. M. Tambe, S. K. Lim, M. J. Smith, L. F. Allard, and S. Gradečak, “Realization of defect-free epitaxial core-shell GaAs/AlGaAs nanowire heterostructures”, Applied Physics Letters , 151917(1-3), 2008.
    Selected for Virtual Journal of Nanoscale Science & Technology, September 8, 2008

85. F. Qian, Y. Li, S. Gradečak, H. G. Park, Y. Dong, Y. Ding, and Z. L. Wang, C. M. Lieber, “Multi-quantum well nanowire heterostructures for wavelength-controlled lasers”, Nature Materials , 701-706, 2008.
    Featured in Nature Photonics 2, 594 (2008), and in Materials Today 11, 11 (2008).

86. S. K. Lim, M. Tambe, M. Brewster, S. Gradečak, “Controlled growth of ternary alloy nanowires using metalorganic chemical vapor deposition”, Nano Letters , 1386-1392 (2008).

87. Y. Li, J. Xiang, F. Qian, S. Gradečak, Y. Wu, H. Yan, D. A. Blom, and C. M. Lieber, “Dopant-Free GaN/AlN/AlGaN Radial Nanowire Heterostructures as High Electron Mobility Transistors”, Nano Letters , 1468-1473, 2006.

88. S. Gradečak, F. Qian, Y. Li, H. G. Park, and C. M. Lieber, “GaN nanowire lasers with low lasing thresholds”, Applied Physics Letters , 173111(1-3), 2005.
    Selected for Virtual Journal of Nanoscale Science & Technology, October 31, 2005

89. F. Qian†, S. Gradečak †, Y. Li†, C. Y. Wen, C. M. Lieber, “Core/multishell nanowire heterostructures as multicolor, high-efficiency light-emitting diodes”, Nano Letters , 2287-2291, 2005. (†) Equal contribution

90. P. V. Radovanovic, C. J. Barrelet, S. Gradečak, F. Qian, and C. M. Lieber, “General synthesis of manganese-doped II-VI and III-V semiconductor nanowires”, Nano Letters , 1407-1411, 2005.

91. B. Lukić, J. W. Seo, E. Couteau, K. Lee, S. Gradečak, R. Berkecz, K. Hernadi, S. Delpeux, T. Cacciaguerra, F. Béguin, A. Fonseca, J. B. Nagy, G. Csányi, A. Kis, A. J. Kulik, and L. Forró, “Elastic modulus of multi-walled carbon nanotubes produced by catalytic chemical vapour deposition”, Applied Physics A , 695-700, 2005.

92. J. Dorsaz, J. F. Carlin, S. Gradečak, and M. Ilegems, “Progress in AlInN-GaN Bragg reflectors: application to a microcavity light emitting diode”, Journal of Applied Physics , 084505(1-6), 2005.

93. S. Gradečak, P. Stadelmann, V. Wagner, and M. Ilegems, “Bending of dislocations in GaN during epitaxial lateral overgrowth”, Applied Physics Letters , 4648-4650, 2004.

94. F. Qian†, Y. Li†, S. Gradečak†, D. L. Wang, C. J. Barrelet, and C. M. Lieber, “Gallium nitride-based nanowire radial heterostructures for nanophotonics”, Nano Letters , 1975-1979, 2004. (†) Equal contribution
    Featured in Materials Today and Reactive Reports. One of four Hot Papers from Nano Letters for September-October 2006

95. D. C. Bell, Y. Wu, C. J. Barrelet, S. Gradečak, J. Xiang, B. P. Timko, and C. M. Lieber, “Imaging and analysis of nanowires”, Microscopy Research and Technique , 373-389, 2004.

96. J. Dorsaz, J. F. Carlin, C. M. Zellweger, S. Gradečak, and M. Ilegems, “InGaN/GaN resonant-cavity LED including an AlInN/GaN Bragg mirror”, physica status solidi (a) , 2675-2678, 2004.

97. S. Gradečak, V. Wagner, M. Ilegems, T. Riemann, J. Christen, and P. Stadelmann, “Microscopic evidence of point defect incorporation in laterally overgrown GaN”, Applied Physics Letters , 2866-2868, 2002.

98. J. C. Lasjaunias, M. Saint-Paul, A. Bilušić, A. Smontara, S. Gradečak, A. M. Tonejc, A. Tonejc, and N. Kitamura, “Acoustic and thermal transport properties of hard carbon formed from C60 fullerene”, Physical Review B , 014302(1-11), 2002.

99. V. Wagner, O. Parillaud, H. J. Buhlmann, M. Ilegems, S. Gradečak, and P. Stadelmann, “Influence of the carrier gas composition on morphology, dislocations and microscopic luminescence properties of selectively grown GaN by HVPE”, Journal of Applied Physics , 1307-1316, 2002.

100. A. Smontara, A. M. Tonejc, S. Gradečak, A. Tonejc, A. Bilušić, and J. C. Lasjaunias, “Structural (XRD and HRTEM) investigations of fullerite C60 and C70 samples”, Materials Science Engineering C , 21-25, 2002.

101. G. Zgrablić, D. Vinković, S. Gradečak, D. Kovačić, N. Biliškov, N. Grbac, Z. Andreić, and S. Garaj, “Instrumental recording of electrophonic sounds from Leonid fireballs”, Journal of Geophysical Research – Space Physics , 1124(1-9), 2002.
     Featured in Nature Science Update, Natural History Magazine, New Scientist, BBC online.

102. A. Smontara, A. Bilušić, J. C. Lasjaunias, M. Saint-Paul, S. Gradečak, A. Mejski-Tonejc, A. Tonejc, N. Kitamura, and S. Bennington, “Thermal and elastic properties of hard carbon”, Strojarstvo , 195-200, 2002.

103. A. Bilušić, S. Gradečak, A. Tonejc, A. T. Tonejc, J. C. Lasajunias, and A. Smontara, “Transport properties of fullerite samples”, Synthetic Metals , 1121-1122, 2001.