Light scattering and organic electronics research group

Publications

* undergraduate students advised by SG
* graduate students advised by SG
* high school students advised by SG

2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003-before

2017

105. Cyclometalated platinum-containing diketopyrrolopyrrole complexes and polymers: photophysics and photovoltaic applications
S. Goswami, J. L. Hernandez, M. Gish, J. Wang, B. Kim, A. P. Laudari*, S. Guha, J. M. Papanikolas, J. R Reynolds, K. S. Schanze, Chem. Mater. 29 (19),  8449 (2017).

104. Polarization-induced transport in organic field-effect transistors: the role of ferroelectric dielectrics
S. Guha and A. Laudari*, Proc. SPIE 10365, 103650I-18 Organic Field-Effect Transistors XVI, 103650I (2017).

103. SERS active self-assembled diphenylalanine micro/nanostructures: A combined experimental and theoretical investigation
S. Kogikoski Jr., S. Khanra*, W. A. Alves, and S. Guha, J. Chem. Phys. 147, 084703 (2017).

102. Polarization-induced transport: A comparative study of ferroelectric and non-ferroelectric dielectric-gated organic field-effect transistors
A. Laudari*, S. Gangopadhyay, and S. Guha, MRS Advances, 1-6. doi:10.1557/adv.2017.324 (2017).

101. Hybrid ZnO-organic semiconductor interfaces in photodetectors: A comparison of two near-infrared donor-acceptor copolymers
A. Pickett*, A. Mohapatra, A. Laudari*, S. Khanra*, T. Ram, S. Patil, and S. Guha, Organic Electronics 45, 115 (2017).

100. Understanding charge transport in lead iodide perovskite thin-film field-effect transistors
S. P. Senanayak, B. Yang, T. H. Thomas, N. Giesbrecht, W. Huang, E. Gann, B. Nair, K. Goedel, S. Guha, X. Moya, C. R. McNeill, P. Docampo, A. Sadhanala, R. H. Friend, H. Sirringhaus, Science Advances 3, e1601935 (2017).

99. Probing nonlinear optical coefficients in self-assembled peptide nanotubes
S. Khanra*, K. Ghosh, F. F. Ferreira, W. A. Alves, F. Punzo. P. Yu, and S. Guha, Phys. Chem. Chem. Phys. 19, 3084 (2017).

2016

98. Plasmonic nano-protrusions: hierarchical nanostructures for single molecule Raman spectroscopy
S. Basuray, A. Pathak, S. Bok, B. Chen, S. Hamm, C. Mathai, S. Guha, K. Gangopadhyay, and S. Gangopadhyay, Nanotechnology 28, 025302 (2017).

97. Bandlike transport in ferroelectric-based oragnic field-effect transistors
A. Laudari* and S. Guha, Phys. Rev. Applied 6, 044007 (2016).

96. Blue emitting organic semiconductors under high pressure: status and outlook
M. Knaapila and S. Guha, Rep. Prog. Phys. 79, 066601 (2016). video abstract

95. Printed dielectric-based organic diodes and transistors
K. Gooden*, A. Laudari*, G. Knotts*, and S. Guha, Flex. Print. Electron. 1 015004 (2016).

94. Polycaprolactone Fibers with Self-Assembled Peptide Micro/ Nanotubes: a Practical Route Towards Enhanced Mechanical Strength and Drug Delivery Applications
M. S. Liberato, S. Kogikoski Jr., E. R. da Silva, D. R. Araújo, S. Guha, and W. A. Alves, J. Mater. Chem. B 4, 1405 (2016).

93. Multifunctional biosensors based on peptide-polyelectrolyte conjugates
S. Kogikoski Jr., C. Sousa, M. Liberato, T. Andrade-Filho, T. Prieto, F. Ferreira, A. Rocha, S. Guha, and W. A. Alves, Phys. Chem. Chem. Phys. 18. 3223 (2016).

92. Visualization of charge transfer excitations in donor-acceptor molecules using the particle-hole map: a case study
Y. Li, D. Moghe*, S. Patil, S. Guha, and C. Ullrich, Mol. Phys. 9 (2016)

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2015

91. Self-assembled peptide-polyfluorene nanocomposites for biodegradable organic electronics
S. Khanra*, T. Cipriano, T. Lam, T. A. White, E. E. Fileti, W. A. Alves, and S. Guha, Adv. Mater. Interfaces 2, 1500265 (2015).
Selected as journal inside front cover
News Item: Science 360 News-top story(NSF) ; MRS 360 Online; NSF News - Multimedia Gallery

90. Polarization-induced transport in ferroelectric-based organic field-effect transistors
A. Laudari* and S. Guha, J. Appl. Phys. 117, 105501 (2015).

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2014

89. Bio-inspired peptide nanostructures for organic field-effect transistors
T. Cipriano*, G. Knotts*, A. Laudari*, R. Bianchi, W. A. Alves, and S. Guha, ACS Appl. Mater. Interfaces 6 (23) 21408 -21415 (2014).

88. Visible light photocatalytic activity of NH4NO3 ion-exchanged nitrogen-doped titanate and TiO2 nanotubes
J. S. Souza, K. Krambrock, M. V. B Pinheiro, R. A. Ando, S. Guha, and W. A. Alves, J. Mol. Cat. A: Chem. 394, 48-56 (2014).

87. Enhanced performance of all organic field-effect transistors and capacitors through choice of solvent
S. Guha, G. Knotts, and N. B. Ukah, Proceedings NSTI-Nanotech 3, 45-48 (2014).

86. Persistence of nematic liquid crystalline phase in a polyfluorene-based organic semiconductor: a high pressure study
S. Guha, M. Knaapila, D. Moghe*, Z. Konopkova, M. Torkkeli, M. Fritsch, and U. Scherf, J. Poly Sci. Part B: Poly. Phys. 52, 1014 (2014).

85. Enhanced performance of ferroelectric-based all organic capacitors and transistors through choice of solvent
G. Knotts*, A. Bhaumik, K. Ghosh, and S. Guha, Appl. Phys. Lett. 104, 233301 (2014).

84. Photocurrent spectroscopic studies of diketopyrrolopyrrole-based statistical copolymers
D. Moghe*, G. Dutta, S. Patil, and S. Guha, Phys. Chem. Chem. Phys 16, 4291 (2014).

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2013

83. Pressure dependence of singlet and triplet excitons in amorphous polymer semiconductors
K. Paudel*, D. Moghe*, M. Chandrasekhar, P. Yu, S. Ramasesha, U. Scherf, and S. Guha, EPL 104, 27008 (2013).

82. Measuring structural inhomogeneity of conjugated polymer at high pressure up to 30 GPa
M. Knaapila, M. Torkkeli, Z. Konopkova, D. Hasse, H.-P. Liermann, U. Scherf, and S. Guha, Macromolecules 46, 8284 (2013).
DESY Press Release

81. Hybrid n-GaN and polymer interfaces: Model systems for tunable photodiodes
P. Kumar, S. Guha, F. Shahedipour-Sandvik, and K. S. Narayan, Organic Electronics 14, 2818 (2013).

80. Enhanced mobility and environmental stability in all organic field-effect transistors: The role of high dipole moment solvent
N. B. Ukah*, S. P. Senanayak, D. Adil*, G. Knotts*, J. Granstrom, K. S. Narayan, and S. Guha, J. Poly. Sci. Part B: Polym. Phys. 51, 1533 (2013).

79. Surface-enhanced Raman spectroscopic studies of the Au-pentacene interface: a combined experimental and theoretical investigation
D. Adil* and S. Guha, J. Chem. Phys. 139, 044715 (2013.)

78. Structural study of helical polyfluorene under high quasihydrostatic pressure
M. Knaapila, Z. Konopkova, M. Torkkeli, D. Hasse. H.-P. Liermann, S. Guha, and U. Scherf, Phys. Rev. E 87, 022602 (2013).

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2012

77. Surface-enhanced Raman spectroscopic studies of metal-semiconductor interfaces in organic field-effect transistors
D. Adil* and S. Guha, J. Phys. Chem C 116, 12779 (2012).

76. Polarization fluctuation dominated electrical transport processes of polymer-based ferroelectric field effect transistors
S. P. Senanayak, S. Guha, and K. S. Narayan, Phys. Rev. B 85, 115311 (2012).

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2011

75. Charge transfer complex states in diketopyrrolopyrrole polymers and fullerene blends: Implications for organic solar cell efficiency
D. Moghe*, P. Yu, C. Kanimozhi. S. Patil, and S. Guha, Appl. Phys. Lett. 99, 233307 (2011).

74. Low operating voltage and stable organic field-effect transistors with poly (methyl methacrylate) gate dielectric solution deposited from a high dipole moment solvent
N. B. Ukah*, J. Granstrom, R. R. Sanganna Gari, G. M. King, and S. Guha, Appl. Phys. Lett. 99, 243302 (2011).

73. High-pressure optical studies of donor-acceptor polymer heterojunctions
K. Paudel*, M. Chandrasekhar, U. Scherf, E. Pries, and S. Guha, Phys Rev B 84, 205208 (2011).

72. MAPLE-deposited polymer films for improved organic devices
S. Guha, N. B. Ukah*, D. Adil*, R. K. Gupta, and K. Ghosh, Applied Physics A 105, 547 (2011).

71. Matrix-assisted-pulsed-laser evaporated polymer films in all organic field-effect transistors and metal-insulator-semiconductor diodes
N. B. Ukah*, D. Adil*, J. Granstrom, R. K. Gupta, K. Ghosh, and S. Guha, Organic Electronics 12, 1580 (2011).

70. Electrical and optical properties of diketopyrrolopyrrole-based copolymer interfaces in thin film devices
D. Adil*, C. Kanimozhi, N. B. Ukah*, K. Paudel*, S. Patil, and S. Guha, ACS Applied Materials and Interfaces 3, 1463 (2011).

69. Tuning structural and optical properties of blue-emitting polymeric semiconductors
S. Guha, M. Chandrasekhar, U. Scherf, and M. Knaapila, Phys. Stat. Sol. B 248, 1083 (2011).

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2010

68. Diffusion length of triplet excitons in organic semiconductors
M. Samiullah, D. Moghe*, U. Scherf, and S. Guha, Phys. Rev. B 82, 205211 (2010).

67. Evidence of structural transition in hairy-rod poly[9,9-bis(2-ethylhexyl)fluorene] under hydrostatic pressure
M. Knaapila, R. Stepanyan, D. Haase, S. Carlson , M. Torkkeli , Y. Cerenius , U. Scherf, and S. Guha, Phys. Rev. E 82 051803 (2010).

66. Interface-controlled pulsed-laser deposited polymer films in organic devices
D. Adil*, N. Ukah*, R. K. Gupta, K. Ghosh, and S. Guha, Synthetic Metals 160, 2501 (2010).

65. Tuning intermolecular interactions in di-octyl substituted polyfluorene via hydrostatic pressure
K. Paudel*, M. Chandrasekhar, and S. Guha, J. Phys. Chem A 114 , 4680 (2010).

64. Role of the triplet state in the green emission peak of polyfluorene films: A time evolution study
S. Mukhopadhyay, S. Ramasesha, and S. Guha, J. Chem. Phys. 132, 044104 (2010).

63. Synthesis of liquid crystalline benzothiazole based derivatives: a study of their optical and electrical properties
G.K. Dutta, S. Guha, and S. Patil, Organic Electronics 11, 1 (2010).

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2009

62. The role of triplet states in the emission mechanism of polymer light-emitting diodes
M. Arif, S. Mukhopadhyay, S. Ramasesha, and S. Guha, Europhys. Lett. 87, 57008 (2009).

61.Triplet excitons in a ladder-type polymer: application in solar cells
K. Yang*, M. Arif, M. Förster, U. Scherf, and S. Guha, Synthetic Metals 159, 2338 (2009).

60. Density functional calculations of strain effects on the binding energies and adatom diffusion on (0001) GaN surfaces
J.R. Grandusky, V. Jindal, J.E. Raynolds, S. Guha , F. Shahedipour-Sandvik, Materials Science and Engineering B 158 13, (2009).

59. Harvesting triplet excitons for application in polymer solar cells
M. Arif*, K. Yang*, L. Li, P. Yu, S. Gangopadhyay, M. Förster, U. Scherf, and S. Guha, Appl. Phys. Lett. 94, 063307 (2009); Virtual Journal of Nanoscale Science & Technology 9 (9) , March 2 (2009).

58. Optical properties of di-octyl substituted polyfluorene under hydrostatic pressure
K. Paudel*, M. Arif, M. Chandrasekhar, and S. Guha, Phys. Stat. Sol. B 246 , 563 (2009).

57. Space-charge-limited conduction in ethyl-hexyl substituted polyfluorene
S. Guha, M. Arif*, S. Gangopadhyay , and U. Scherf, J. Materials Science: Materials in Electronics 20, S351 (2009).

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2008

56. Pulsed laser thin film growth of di-octyl substituted polyfluorene and its co-polymers
R. K. Gupta, K. Ghosh, P.K. Kahol, J. Yoon*, and S. Guha, Applied Surface Science 254, 7069 (2008).

55. Raman spectroscopic studies of polyfluorenes
S. Guha, The Open Journal of Physical Chemistry 2, 6 (2008). ( invited review )

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2007

54. Quantum dots by ultraviolet and x-ray lithography
M. F Bertino, R. Gadipalli, L. Martin, L. Rich, A. Yamilov, B. Heckman, N. Leventis, S. Guha, J. Katsoudas, R. S. Divan and D. C. Mancini, Nanotechnology 18, 315603 (2007).

53. Probing electronic excitations in organic light-emitting diodes via Raman scattering
M. Arif*, S. Guha, A. Tsami, U. Scherf, Appl. Phys. Lett. 90, 252105 (2007).

52. Interface states in polyfluorene-based metal-insulator-semiconductor diodes
M.Yun*, S. Gangopadhyay, M. Bai, H. Taub , M. Arif*, and. S. Guha, Organic Electronics 8, 591 (2007).

51. Polyfluorene as a model system for space-charge-limited conduction
M. Arif*, M. Yun*, S. Gangopadhyay, K. Ghosh, L. Fadiga, F. Galbrecht, and U. Scherf, S. Guha, Phys. Rev. B 75, 195202 (2007).

50. Crystallization of amorphous silicon by self propagation of nano-engineered thermites
M. Hossain, S. Subramanian, S. Bhattacharya, Y. Gao, S. Apperson, R. Shende, S. Guha, M. Arif*, K. Gangopadhyay, and S. Gangopadhyay, J. Appl. Phys. 101, 054509 (2007); Virtual Journal of Nanoscale Science & Technology 15 (11), March 19 (2007).

49. Conformations in di-octyl substituted polyfluorene: a combined theoretical and experimental Raman scattering study
C. Volz*, M. Arif*, and S. Guha, J. Chem. Phys. 126, 064905 (2007).

48. Structural and spectroscopic investigations of bulk poly[9,9-n-dioctyl fluorene]
B. Tanto, S. Guha, M. Arif*, and M.J. Winokur (Submitted, 2006).

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2006

47. Enhanced dielectric constant of HfO 2 and Al 2 O 3 thin-films with silver nanoparticles
R. Ravindran, M. Othmana, M. Yun, N. Biswas, N. Mehta, S. Guha, K. Gangopadhyay, and S. Gangopadhyay, ECS Transactions, 3 (3) 535 (2006).

46. Infra red quantum dot photolithography
R.R. Gadipalli, L.A .Martin, B. Heckman, J.G. Story, M.F. Bertino, P. Fraundorf, S. Guha, and N. Leventis, J. Sol-Gel Sci. Technol. 40, 101 (2006).

45. Patterning porous matrices and planar substrates with quantum dots
R R Gadipalli, L. A. Martin, J. G. Story; B. Heckman, Massimo F Bertino, N. Leventis, P. Fraundorf, S. Guha, J. Sol-Gel Sci. Technol. 39, 299 (2006).

44. Electrical characterization of polyfluorene-based metal-insulator-semiconductor diodes
M.Yun*, M. Arif*, S. Gangopadhyay, and S. Guha, Mat. Res. Soc. Symp. Proc. 973E, Warrendale , PA , M07-08 (2006).

43. Chain morphologies in blue-emitting polyfluorenes: impact on light-emitting diodes
S. Guha, M. Arif*, and C. Volz*, Mat. Res. Soc. Symp. Proc. 916 , Warrendale , PA , DD01-02 (2006).

42. Chain morphologies in semi-crystalline polyfluorene: evidence from Raman scattering
M. Arif*, C. Volz*, and S. Guha, Phys. Rev. Lett. 96, 025503 (2006).

41.Capacitance-voltage characterization of polyfluorene-based metal-insulator-semiconductor diodes
M. Yun*, R. Ravindran, M. Hossain, S. Gangopadhyay, U. Scherf, T. Bünnagel, F. Galbrecht, M. Arif* and S. Guha, Appl. Phys. Lett. 89 , 013506 (2006).

40. Agarose-stabilized gold nanoparticles for surface-enhanced Raman spectroscopic detection of DNA nucleosides
V. Kattumuri*, S. Guha, M. Chandrasekhar, K. Raghuraman, K. V. Katti , K. Ghosh and R.J. Patel, Appl. Phys. Lett. 88, 153114 (2006); Virtual Journal of Nanoscale Science & Technology 13 (16) , April 24 (2006); Virtual Journal of Biological Physics Research 11 (8), April 15 (2006).

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2005

39. Development of low dislocation and strain reduced GaN on Si(111) by substrate engineering
M. Jamil , J. R. Grandusky , V. Jindal , F. Shahedipour-Sandvik, S. Guha, and M. Arif*, Proc. SPIE Int. Soc. Opt. Eng. 5941 , 59411E (2005).

38. Development of strain reduced GaN on Si (111) by substrate engineering
M. Jamil, J. R. Grandusky, V. Jindal, F. Shahedipour-Sandvik, S. Guha, and M. Arif*, Appl. Phys. Lett. 87, 082103 (2005).

37. Electronic structures and spectral properties of endohedral fullerenes
S. Guha and K. Nakamoto, Coordination Chemistry Reviews 249, 1111-1132 (2005). [Review Article] Recognized as a 'top 50' most cited article from CCR, as published (2005-2008).

36. Raman scattering from organic light emitting diodes
S. Guha, M. Arif*, J.G. Keeth*, T.W. Kehl, K. Ghosh, and R.E. Giedd, Proceedings of the 27th International Conference on the Physics of Semiconductors, eds. J. Menendez and C. G. Van de Walle, American Institute of Physics 1079 (2005).

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2004

35. Laser writing of semiconductor nanoparticles and quantum dots
M. F. Bertino, R.R. Gadipalli, J.G. Story, C.G. Williams, G. Zhang, C. Sotiriou-Leventis, A. T. Tokuhiro, S. Guha and N. Leventis, Appl. Phys. Lett. 85, 6007 (2004) and Virtual Journal of Nanoscale Science & Technology 10 (25) , Dec. 20, (2004) [FEATURED in the MRS bulletin, Feb 2005]

34. Structural and spectroscopic investigations of bulk poly (bis(2-ethyl)hexylfluorene)
B. Tanto, S. Guha, C.M. Martin, U. Scherf, and M.J. Winokur, Macromolecules 37, 9438 (2004).

33.Photophysics of organic emissive semiconductors under hydrostatic pressure
S. Guha and M. Chandrasekhar, Phys. Stat. Sol. (b) 241, 3318 (2004).

32. Raman modes in oligophenyls under hydrostatic pressure
C.M. Martin, Q. Cai , S. Guha, W. Graupner, M. Chandrasekhar, and H.R. Chandrasekhar, Phys. Stat. Sol. (b) 241, 3339 (2004).

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2003-before

31.Temperature dependent optical studies of Ti1-xCoxO2
S. Guha, K. Ghosh, J.G. Keeth*, S. B. Ogale, S. R. Shinde, J. R. Simpson, H. D. Drew, and T. Venkatesan, Appl. Phys. Lett. 83, 3296 (2003) [and Appl. Phys. Lett. 84 , 1613 (2004)]

30. Hydrostatic pressure dependence of the luminescence and Raman frequencies in polyfluorene
C.M. Martin, S. Guha, M. Chandrasekhar, H.R. Chandrasekhar, R. Guentner, P. Scanduicci de Freitas, U. Scherf, Phys. Rev. B 68 , 115203 (2003).

29. Effect of temperature and pressure on the optical properties of polyfluorene
C.M. Martin, S. Guha, M. Chandrasekhar, H.R. Chandrasekhar, R. Guentner, P.Scandiucci de Freitas, U. Scherf, Synthetic Metals 135-136, 273 (2003).

28. Temperature dependent photoluminescence of organic semiconductors with varying backbone conformation
S. Guha, J. D. Rice*, Y. T. Yau*, C. M. Martin, M. Chandrasekhar, H.R. Chandrasekhar, R. Guentner, P.Scandiucci de Freitas, U. Scherf, Phys. Rev. B 67 , 125204 (2003).

27. Optical spectroscopic studies of a soluble fluorene-based conjugated polymer: a hydrostatic pressure and temperature study
S. Guha, J.D. Rice*, C. M. Martin. M. Chandrasekhar, W. Graupner, and U. Scherf, Mat. Res. Soc. Symp. Proc. Vol. 708 , BB10.7.1 (2002).

26. Tuning intermolecular interactions: A study of the structural and vibrational properties of para -hexaphenyl under pressure
S. Guha, W. Graupner, R. Resel, M. Chandrasekhar, H.R. Chandrasekhar, R. Glaser and G. Leising, J. Phys. Chem. 105 , 6203 (2001).

25. Squeezing organic conjugated polymers: What does one learn?
M. Chandrasekhar, S. Guha, and W. Graupner , Advanced Materials 13 , 613 (2001).

24. Comparative optical studies of p-type and undoped GaN
S. Guha, F. Shahedipour, R.C. Keller*, V. Yang* and B.W. Wessels, Appl. Phys. Lett. 78 , 58 (2001).

23. Optical transitions in para-phenylenes under hydrostatic pressure
M. Chandrasekhar, S. Guha, Q. Cai, C. M. Martin, S. C. Yang, H.R. Chandrasekhar, W. Graupner, G. Leising, Synthetic Metals 119 , 657-658 (2001).

22. Optical properties of Organic Wide Bandgap Semiconductors Under High Pressure
S. Guha, W. Graupner, S. Yang, M. Chandrasekhar, H. R. Chandrasekhar , Book Chapter in " Anisotropic Organic Materials - Approaches to Polar Order ", edited by R. Glaser and P. Kaszynski; ACS Symposium Series, Volume 798. American Chemical Society: Washington , D.C. , July 2001. ISBN: 0841236895.

21. Geometry dependent electronic properties of highly fluorescent conjugated molecules
S. Yang, W. Graupner, S. Guha, P. Puschnig, C. Martin, H. R. Chandrasekhar, M. Chandrasekhar, G. Leising, C. Ambrosch-Draxl, Phys. Rev. Lett. 85 , 2388 (2000).

20. Influence of the molecular geometry on the photoexcitations of highly emissive organic semiconductors
S. Yang, W. Graupner, S. Guha, C. Martin, H. R. Chandrasekhar, M. Chandrasekhar, G. Leising, SPIE Proceedings 3797 , 26 (1999).

19. High pressure study of Raman modes in YBa2 (Cu 0.96 Ni 0.04 )4 O8
D.J. Payne, S. Guha, Q. Cai, M. Chandrasekhar, H.R. Chandrasekhar, U.D. Venkateswaran, B. Jayaram, J. Ulanday, Phys. Rev. B, 60 , 4363, (1999).

18. Planarity of para hexaphenyl
S. Guha, W. Graupner, R. Resel, M. Chandrasekhar, H.R. Chandrasekhar, R. Glaser and G. Leising, Phys. Rev. Lett. 82 , 3625 (1999).

17. Optical properties of poly (para phenylenes) under high pressure
S. Guha, S. Yang, W. Graupner, M. Chandrasekhar, H.R. Chandrasekhar, and G. Leising. Phys. Stat. Sol. B 211 , 177 (1999).

16. High pressure studies on the planarity of para-hexaphenyl
S. Guha, W. Graupner, R. Resel, M. Chandrasekhar, H. R. Chandrasekhar, R. Glaser, G. Leising, Synthetic Metals 101 , 180 (1999).

15. Raman phonons under hydrostatic pressure in YBa 2 (Cu1-x Ni x )4O8
D.J. Payne, S. Guha, Q. Cai, M. Chandrasekhar, H.R. Chandrasekhar, B. Jayaram, J. Ulanday, Review of High Pressure Science and Technology 7 , 535 (1998).

14. Electronic properties of poly (para-Phenylenes) under high pressure
W. Graupner, S. Guha, S. Yang, M. Chandrasekhar, H.R. Chandrasekhar, G. Leising, U. Scherf, K. Müllen, Mat. Res. Soc. Symp. Proc. Vol. 488 , 873 (1998).

13. Temperature dependence of the intervalley deformation potential of GaAs/AlAs superlattices under hydrostatic pressure
S. Guha, Q. Cai, M. Chandrasekhar, H.R. Chandrasekhar, H. Kim, A.D. Alvarenga, R. Vogelgesang, A.K. Ramdas and M.R. Melloch, Mat. Res. Soc. Symp. Proc. Vol. 499 , 201 (1998).

12. Structural properties of hexaphenyl powder under high pressure
S. Guha, W. Graupner, R. Resel, M. Chandrasekhar, H.R. Chandrasekhar, and G. Leising, Mat. Res. Soc. Symp. Proc. Vol. 488 , 867 (1998).

11.Photoluminescence of short period GaAs/AlAs superlattices: a hydrostatic pressure and temperature study
S. Guha, Q. Cai, M. Chandrasekhar, H.R. Chandrasekhar, H. Kim, A.D. Alvarenga, R. Vogelgesang, A.K. Ramdas and M.R. Melloch, Phys. Rev. B 58 , 7222 (1998).

10. Temperature dependence of interband transition in short period GaAs/AlAs superlattices
S. Guha, Q. Cai, M. Chandrasekhar, H.R. Chandrasekhar, H. Kim, A.D. Alvarenga, R. Vogelgesang, A.K. Ramdas and M.R. Melloch, Physics of Low-Dimensional Structures 11/12 , 57 (1997).

9. The isotope effect on the Raman spectrum of the pentagonal-pinch mode in C60
S. Guha, J. Menéndez, J.B. Page, and G.B. Adams, Phys. Rev. B 56 , 15431 (1997).

8. Raman cross section for the pentagonal-pinch mode in buckminsterfullerene C 60
J.D. Lorentzen, S. Guha, J. Menéndez, P. Gianozzi, and S. Baroni, Chem. Phys. Lett. 270 , 129 (1997).

7. Empirical bond polarizability model for fullerenes
S. Guha, J. Menéndez, J.B. Page, and G.B. Adams, Phys. Rev. B 53 , 13106 (1996).

6. "Electron-phonon interactions in solid C60 studied by transient picosecond Raman spectroscopy ", K.T. Tsen, E.D. Grann, S. Guha, and J. Menéndez, Appl. Phys. Lett. 68 , 1051 (1996).

5. Silent-mode vibrational frequencies in C60
J. Menéndez and S. Guha, Proc. 22nd intern. Conf. on Physics of Semiconductors (World Scientific, Singapore, 1995), p.2093.

4. Isotopically resolved Raman spectra of C 60
S. Guha, J. Menéndez, J.B. Page, G.B. Adams, G.S. Spencer, J.P. Lehman, P. Giannozzi and S.Baroni, Phys. Rev. Lett. 72 , 3359 (1994).

3. Extrinsic nature of the 2.5 eV Raman resonance in C 60
S. Guha, J. Lorentzen, K. Sinha, J. Menéndez, G.B. Adams, J.B. Page and O.F. Sankey, Mol. Cryst. and Liq. Cryst. 256 , 391 (1994).

2. The isotope effect on the Raman spectrum of molecular C 60
J. Menéndez, J.B. Page and S. Guha, Philosophical Mag. B 70 , 651 (1994).

1.Raman study of photoexcited C60
K. Sinha, S. Guha and J. Menéndez, Solid State Commun. 87 , 981 (1993).

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