Journal Publications

List of Publications in Peer Reviewed Journal (Selected):

Surface optic modes in ternary aligned crystalline InGaN/GaN multi-quantum well nanopillar arrays S.-E. Wu, Y.-W. Huang, T.-H. Hsueh, S. Dhara, Y.-F. Lai, C.-Y. Wang, and C.-P. Liu J. Raman Spectroscopy (In Press)2009
Mechanism of recrystallization process in epitaxial GaN under dynamic stress field : Atomistic origin of planar defect formation C. R. Das, S. Dhara, H. C. Hsu, L. C. Chen, Y. R. Jeng, A. K. Bhaduri, Baldev Raj, K. H. Chen, S. K. Albert, J. Raman Spectroscopy (In Press) 2008.
Phonon confinement and substitutional disorder in Cd1-xZnxS Nanocrystals S. Sahoo, S. Dhara, V. Sivasubramanian, S. Kalavathy and A. K. Arora J. Raman Spectroscopy (In Press) 2008.
Phonon confinement in stressed silicon nanocluster S. Sahoo, S. Dhara, S. Mahadevan and A. K. Arora J. Nanoscience and Nanotechnology (In press) 2008.
X-ray reflectivity studies on DLC films deposited by microwave ECR CVD: Effect of substrate bias S. B. Singh, A. K. Poswal, M. Pandey, R. B. Tokas, N. Chand, S. Dhara, B. Sunderval, K. G. M. Nair , N. K. Sahoo, and D. S. Patil Surface and Coatings Technology, 203 (2009) 986.
Surface optical Raman modes in InN nanostructures S. Sahoo, M. S. Hu, C. W. Hsu, L. C. Chen, K. H. Chen, A. K. Arora and S. Dhara Appl. Phys. Lett. 93 (2008) 233116. (Virtual J. of Nanoscale Science & Technology, Vol. 18, Issue 25, 2008)
Resonance Raman study of He+ ion implanted nanostructured ZnS S. Saravana Kumar, M. Abdul Khadar, K. G. M. Nair, S. Dhara, P. Magudapathy J. Raman Spectroscopy 39 (2008) 1900.
Mechanism of bright red emission in Si nanoclusters S. Dhara, C.-Y. Lu, K.G.M. Nair, K.-H. Chen, C.-P. Chen, Y.-F. Huang, C. David, L.-C. Chen and Baldev Raj Nanotechnology 19 (2008) 395401. http://nanotechweb.org/cws/article/lab/35583
Recrystallization of epitaxial GaN under indentation S. Dhara, C. R. Das, H. C. Hsu, Baldev Raj, A. K. Bhaduri, S. K. Albert, L. C. Chen, K. H. Chen and Ayan Ray Appl. Phys. Lett. 92 (2008) 143114. http://research.ncku.edu.tw/re/reck/e/20081107/home.html
Excitation energy dependence of electron-phonon interaction in ZnO nanoparticles S. Sahoo, V. Sivasubramanian, S. Dhara and A. K. Arora Solid State Communications 147 (2008) 271.
Long range ferromagnetic ordering at room temperature in Co+ implanted TiO2 nanorods S. Dhara, J. J. Wu, G. Mangamma, S. Bera, C. T. Wu, P. Magudapathy, C. C. Yu, M. Kamruddin, K. G. M. Nair, A. K. Tyagi, L. C. Chen, and K. H. Chen. Nanotechnology 18 (2007) 325705.
Formation, Dynamics, and Characterization of Nanostructures by Ion Beam Irradiation S. Dhara Invited Review Article in Critical Reviews in Solid State and Material Sciences 32 (2007) 1-50. http://www.microscopy analysis.com/download/914/LiteratureHighlights_Nov2007.pdf
Multiphonon Raman scattering in GaN nanowires S. Dhara, Sharat Chandra, G. Mangamma, S. Kalavathi, P. Shankar, K. G. M. Nair, A. K. Tyagi, C. W. Hsu, C. C. Kuo, L. C. Chen K. H. Chen, and K. K. Sriram Appl. Phys. Lett. 90 (2007) 213104.
Formation and growth of embedded Indium nanoclusters by In2+ Implantation in Silica P. Santhana Raman, K. G. M. Nair, R. Kesavamoorthy, B. K. Panigrahi, S. Dhara and V. Ravichandran Appl. Phys. A 87 (2007) 709.
Raman measurements and stress analysis in gallium ion-implanted gallium nitride epitaxial layers on sapphire S. Mal, A. Singha, S. Dhara, A. Roy Thin Solid Films 515 (2006) 2798.
Ferromagnetism in cobalt doped n-GaN S. Dhara, B. Sundaravel, K. G. M. Nair, R. Kesavamoorthy, M. C. Valsakumar, T. V. Chandrasekhar Rao, L. C. Chen, and K. H. Chen Appl. Phys. Lett. 88 (2006) 173110
Nitrogen ion beam synthesis of InN in InP(100) at elevated temperature S. Dhara, P. Magudapathy, R. Kesavamoorthy, S. Kalavathi, V. S. Sastry, K. G. M. Nair, G. M. Hsu, L. C. Chen, K. H. Chen, K. Santhakumar and T. Soga Appl. Phys. Lett. 88 (2006) 241904.
Optical characterization of GaN by N+ implantation into GaAs at elevated temperature S. Dhara, P. Magudapathy, R. Kesavamoorthy, S. Kalavathi, K. G. M. Nair, G. M. Hsu, L. C. Chen, K. H. Chen, K. Santhakumar and T. Soga Appl. Phys. Lett. 87 (2005) 261915
Formation and in-situ dynamics of metallic nanoblisters in Ga+ implanted GaN nanowires A. Datta, S. Dhara, S. Muto, C. W. Hsu, C. T. Wu, C. H. Shen, T. Tanabe, T. Maruyama, K. H. Chen, L. C. Chen, and Y. L. Wang Nanotechnology, 16 (2005) 2764.
Mechanism of nanoblister formation in Ga+ self-ion implanted GaN nanowires S. Dhara, A. Datta, C.T. Wu, K. H. Chen, Y. L. Wang, S. Muto, T. Tanabe, C. W. Hsu, C. H. Shen, L. C. Chen, and T. Maruyama Appl. Phys. Lett. 86 (2005) 203119.
Blue luminescence of Au nanoclusters embedded in silica matrix S. Dhara, Sharat Chandra, P. Magudapathy, S. Kalavathi, B. K. Panigrahi, K.G.M. Nair, V.S. Sastry, C. W. Hsu, C.T. Wu, K.H. Chen, and L.C. Chen J. Chem. Phys. 121 (2004) 12595 (Virtual J. of Nanoscale Science & Technology, Vol. 10, Issue 26, 2004)
‘Spillout’ effect in gold nanoclusters embedded in c-Al2O3(0001) matrix S. Dhara, B. Sundaravel, T. R. Ravindran, K. G. M. Nair, C. David, B. K. Panigrahi, P. Magudapathy, and K. H. Chen Chem. Phys. Lett. 399 (2004) 354.
Comment on “Gold nanowires from silicon nanowire templates” [Appl. Phys. Lett. 84, 407 (2004)] S. Dhara and K. G. M. Nair Appl. Phys. Lett. 85 (2004) 692.
Hexagonal-to-cubic phase transformation in GaN nanowires by Ga+-implantation S. Dhara, A. Datta, C. W. Hsu, C. T. Wu, C. H. Shen, Z. H. Lan, K. H. Chen, L.C. Chen,Y. L. Wang, C. C. Chen Appl. Phys. Lett. 84 (2004) 5473.
Blue shift of yellow luminescence band in self-ion implanted GaN nanowire S. Dhara, A. Datta,C. T. Wu, Z. H. Lan, K. H. Chen,Y. L. Wang, L. C. Chen, C. W. Hsu, H. M. Lin, C. C. Chen Appl. Phys. Lett. 84 (2004) 3486. (Virtual J. of Nanoscale Science & Technology, Vol. 9, Issue 18, 2004)
Characterization of nanodome on GaN nanowires formed with Ga ion irradiation S. Muto, S. Dhara, A. Datta, C.-W. Hsu, C.-T. Wu, C.-H. Shen, L.-C. Chen, K.-H. Chen, Y.-L. Wang, T. Tanabe, T. Maruyama, H.-M. Lin, C.-C. Chen Materials Transactions 45 (2004) 435.

Dr . Sandip Kumar Dhara

Journal Publications

List of Publications in Peer Reviewed Journal (Selected):

Surface optic modes in ternary aligned crystalline InGaN/GaN multi-quantum well nanopillar arrays S.-E. Wu, Y.-W. Huang, T.-H. Hsueh, S. Dhara, Y.-F. Lai, C.-Y. Wang, and C.-P. Liu J. Raman Spectroscopy (In Press)2009

Mechanism of recrystallization process in epitaxial GaN under dynamic stress field : Atomistic origin of planar defect formation C. R. Das, S. Dhara, H. C. Hsu, L. C. Chen, Y. R. Jeng, A. K. Bhaduri, Baldev Raj, K. H. Chen, S. K. Albert, J. Raman Spectroscopy (In Press) 2008.

Phonon confinement and substitutional disorder in Cd1-xZnxS Nanocrystals S. Sahoo, S. Dhara, V. Sivasubramanian, S. Kalavathy and A. K. Arora J. Raman Spectroscopy (In Press) 2008.

Phonon confinement in stressed silicon nanocluster S. Sahoo, S. Dhara, S. Mahadevan and A. K. Arora J. Nanoscience and Nanotechnology (In press) 2008.

X-ray reflectivity studies on DLC films deposited by microwave ECR CVD: Effect of substrate bias S. B. Singh, A. K. Poswal, M. Pandey, R. B. Tokas, N. Chand, S. Dhara, B. Sunderval, K. G. M. Nair , N. K. Sahoo, and D. S. Patil Surface and Coatings Technology, 203 (2009) 986.

Surface optical Raman modes in InN nanostructures S. Sahoo, M. S. Hu, C. W. Hsu, L. C. Chen, K. H. Chen, A. K. Arora and S. Dhara Appl. Phys. Lett. 93 (2008) 233116. (Virtual J. of Nanoscale Science & Technology, Vol. 18, Issue 25, 2008)

Resonance Raman study of He+ ion implanted nanostructured ZnS S. Saravana Kumar, M. Abdul Khadar, K. G. M. Nair, S. Dhara, P. Magudapathy J. Raman Spectroscopy 39 (2008) 1900.

Mechanism of bright red emission in Si nanoclusters S. Dhara, C.-Y. Lu, K.G.M. Nair, K.-H. Chen, C.-P. Chen, Y.-F. Huang, C. David, L.-C. Chen and Baldev Raj Nanotechnology 19 (2008) 395401. http://nanotechweb.org/cws/article/lab/35583

Recrystallization of epitaxial GaN under indentation S. Dhara, C. R. Das, H. C. Hsu, Baldev Raj, A. K. Bhaduri, S. K. Albert, L. C. Chen, K. H. Chen and Ayan Ray Appl. Phys. Lett. 92 (2008) 143114. http://research.ncku.edu.tw/re/reck/e/20081107/home.html

Excitation energy dependence of electron-phonon interaction in ZnO nanoparticles S. Sahoo, V. Sivasubramanian, S. Dhara and A. K. Arora Solid State Communications 147 (2008) 271.

Long range ferromagnetic ordering at room temperature in Co+ implanted TiO2 nanorods S. Dhara, J. J. Wu, G. Mangamma, S. Bera, C. T. Wu, P. Magudapathy, C. C. Yu, M. Kamruddin, K. G. M. Nair, A. K. Tyagi, L. C. Chen, and K. H. Chen. Nanotechnology 18 (2007) 325705.

Formation, Dynamics, and Characterization of Nanostructures by Ion Beam Irradiation S. Dhara Invited Review Article in Critical Reviews in Solid State and Material Sciences 32 (2007) 1-50. http://www.microscopy analysis.com/download/914/LiteratureHighlights_Nov2007.pdf

Multiphonon Raman scattering in GaN nanowires S. Dhara, Sharat Chandra, G. Mangamma, S. Kalavathi, P. Shankar, K. G. M. Nair, A. K. Tyagi, C. W. Hsu, C. C. Kuo, L. C. Chen K. H. Chen, and K. K. Sriram Appl. Phys. Lett. 90 (2007) 213104.

Formation and growth of embedded Indium nanoclusters by In2+ Implantation in Silica P. Santhana Raman, K. G. M. Nair, R. Kesavamoorthy, B. K. Panigrahi, S. Dhara and V. Ravichandran Appl. Phys. A 87 (2007) 709.

Raman measurements and stress analysis in gallium ion-implanted gallium nitride epitaxial layers on sapphire S. Mal, A. Singha, S. Dhara, A. Roy Thin Solid Films 515 (2006) 2798.

Ferromagnetism in cobalt doped n-GaN S. Dhara, B. Sundaravel, K. G. M. Nair, R. Kesavamoorthy, M. C. Valsakumar, T. V. Chandrasekhar Rao, L. C. Chen, and K. H. Chen Appl. Phys. Lett. 88 (2006) 173110

Nitrogen ion beam synthesis of InN in InP(100) at elevated temperature S. Dhara, P. Magudapathy, R. Kesavamoorthy, S. Kalavathi, V. S. Sastry, K. G. M. Nair, G. M. Hsu, L. C. Chen, K. H. Chen, K. Santhakumar and T. Soga Appl. Phys. Lett. 88 (2006) 241904.

Optical characterization of GaN by N+ implantation into GaAs at elevated temperature S. Dhara, P. Magudapathy, R. Kesavamoorthy, S. Kalavathi, K. G. M. Nair, G. M. Hsu, L. C. Chen, K. H. Chen, K. Santhakumar and T. Soga Appl. Phys. Lett. 87 (2005) 261915

Formation and in-situ dynamics of metallic nanoblisters in Ga+ implanted GaN nanowires A. Datta, S. Dhara, S. Muto, C. W. Hsu, C. T. Wu, C. H. Shen, T. Tanabe, T. Maruyama, K. H. Chen, L. C. Chen, and Y. L. Wang Nanotechnology, 16 (2005) 2764.

Mechanism of nanoblister formation in Ga+ self-ion implanted GaN nanowires S. Dhara, A. Datta, C.T. Wu, K. H. Chen, Y. L. Wang, S. Muto, T. Tanabe, C. W. Hsu, C. H. Shen, L. C. Chen, and T. Maruyama Appl. Phys. Lett. 86 (2005) 203119.

‘Spillout’ effect in gold nanoclusters embedded in c-Al2O3(0001) matrix S. Dhara, B. Sundaravel, T. R. Ravindran, K. G. M. Nair, C. David, B. K. Panigrahi, P. Magudapathy, and K. H. Chen Chem. Phys. Lett. 399 (2004) 354.

Comment on “Gold nanowires from silicon nanowire templates” [Appl. Phys. Lett. 84, 407 (2004)] S. Dhara and K. G. M. Nair Appl. Phys. Lett. 85 (2004) 692.

Hexagonal-to-cubic phase transformation in GaN nanowires by Ga+-implantation S. Dhara, A. Datta, C. W. Hsu, C. T. Wu, C. H. Shen, Z. H. Lan, K. H. Chen, L.C. Chen,Y. L. Wang, C. C. Chen Appl. Phys. Lett. 84 (2004) 5473.

Blue shift of yellow luminescence band in self-ion implanted GaN nanowire S. Dhara, A. Datta,C. T. Wu, Z. H. Lan, K. H. Chen,Y. L. Wang, L. C. Chen, C. W. Hsu, H. M. Lin, C. C. Chen Appl. Phys. Lett. 84 (2004) 3486. (Virtual J. of Nanoscale Science & Technology, Vol. 9, Issue 18, 2004)

Characterization of nanodome on GaN nanowires formed with Ga ion irradiation S. Muto, S. Dhara, A. Datta, C.-W. Hsu, C.-T. Wu, C.-H. Shen, L.-C. Chen, K.-H. Chen, Y.-L. Wang, T. Tanabe, T. Maruyama, H.-M. Lin, C.-C. Chen Materials Transactions 45 (2004) 435.

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