Proceedings of theXIII International Workshop

on

Physics of Semiconductor Devices(IWPSD - 2005)

December 13-17, 2005

Vol. I

Editors:Vikram KumarS.K. AgarwalS.N. Singh

TECHNISCHEINFORMATIONSBiBLIOTHEK

UNIVERSiTATSBiBLIOTHEKHANNOVER

National Physical LaboratoryNew Delhi

ALLIED PUBLISHERS PVT. LIMITEDNew Delhi • Mumbai • Kolkata • Lucknow • Chennai

Nagpur • Bangalore • Hyderabad • Ahmedabad

Contents

Vol. I

Co-Sponsors v

Preface vii

Section A: Optoelectronics

Invited Papers1. Peculiar Light 5

P. St. J. Russell

2. Carbon Nanotube Field-Effect Transistors: 7AC Performance CapabilitiesD.L. Pulfrey, D.L. John and LC. Castro

3. Narrow Spectral Band Monolithic Lead-Chalcogenide-on-Si 14mid-IR Photodetectors and High Reflectance Bragg MirrorsHans Zogg, Martin Arnold, Ferdinand Felder and Mohamed Rahim

4. Opportunities and Challenges in Crystalline Silicon Photovoltaics 20Ajeet Rohatgi, Mohamed Hilali, Alan Ristow, Vichai Meemongkolkiat,Ajay Upadhyaya, Kenta Nakayashiki, Vijay Yelundur and Abasifreke Ebong

5. InAsSb Based Mid-Infrared Photodetectors: Theoretical Studies 29and Experimental ResultsP. Chakrabarti

6. Innovations in Light-Emitting Devices 38E. Fred Schubert, Jong Kyu Kim, J. -Q. Xi and Hong Luo

7. Profiling of Light Emission of Homoepitaxial GaN-Based 49Laser DiodesM. Godlewski, M.R. Phillips, T. Wojtowicz, R. Czernecki, G. Targowski,P. Perlin, M. Leszczynski, S. Figge and D. Hommel

8. Integrated Optical and Photonic Nanostructures on Silicon 56S. R. Singh

9. Nanostructured Conducting Polymer Films for Optoelectronic Devices 65Mitsuyoshi Onoda, Kazuya Tada, P.K. BhatnagarandPC. Mathur

10. Flexible Solar Cells on Polymer Foils with Record Efficiencies 71D. Eire" maud, D. Rudmann, H. M. Upadhyaya and A. N. Tiwari

11. Recent Work on Transport and Stability of Polymers Leds 79S. C. Jain and R. Mertens

12. Recent Advances in Infrared and Visible Imaging Technology 85Jagmohan Bajaj and Atul Joshi

13. Nanostrutured Solar Cells Based on Organic and 100Inorganic SemiconductorsVijay P Singh, R.S. Singh, Allen M. Hermann,Visweshwaran Jayaraman and Karen Sampson

Contributed Papers14. Comparison of Dislocation Induced Tunnelling Current and 111

Shunt Resistance Contributions to the Electrical Impedance ofNarrow Band-Gap HgCdTe DiodesSudha Gupta and Vishnu Gopal

15. Current-Voltage Characteristics of Al-(n)CdSe-Ag,Ni,Sn Junctions 116M.N. Borah, S. Chaliha, PC. Sarmah and A. Rahman

16. A Novel Method for Self-Consistent Simulation of 120Semiconductor LasersManmohan Singh Shishodia, G.B. Reddy and Anurag Sharma

17. Analytical Modeling of Photo-Effects on the Frequency- 125Dependent Output Conductance of GaAs MESFET'sNeti. V.L. Narasimha Murty and S. Jit

18. Be ION-Implantation in HgCdTe 129R. Manchanda, O.P. Thakur, A. Malik, R. Pal, A. Dhaul, M.B. Dutt,R.K. Sharma and P.K. Basu

19. Diamond-Like Carbon (DLC) as Antireflection Coating for 133Silicon Solar CellC.M.S. Rauthan, Sushil Kumar and P.N. Dixit

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20. Optimization of FACET Coating for High Power 137AlGaAs/GaAs Laser DiodesAlokJain, T.V.S.L. Satyavani, Sunil Sharma, Deepti Jain, Satish Mohan,A.A. Naik, Amit Bhatti, S.K. Mehta and H.P. Vyas

21. Photoluminescence and Stress/Strain Studies of Porous Silicon 141Films: Role of Surface Morphology of Si (100)Shailesh N. Sharma, G. Bhagavannarayana, S. Chandra Mohan and R. Debnath

22. Effect of Back Emitter Properties of Spectral Response and 145Reverse I-V Characteristics of Silicon p+-n-n+ (Pin) PhotodiodesB.C. Chakravarty, Jyoti Tripathi, R. Kumar, M. Lai, P.K. Singh and S.N. Singh

23. Transport Properties in Surface Layer of n-HgCdTe 149R. Manchanda, O.P. Thakur, A. Malik, R. Pal, R.K. Sharma and P.K. Basu

24. GaAs for Optoelectronic Devices 153Zahid Hasan Mahmood, Qamrun Nahar, Saeed Mahmud Ullah,U. Mehboob Pasha and Jalalur Rahman

25. Ion Implanted Disordered Silicon for Bolometric Applications 158M.B. Dutt, Vandna Mittal, S.P. Chowdhury and P.K. Chaudhary

26. Chemically Synthesized CdTe Thin Films for Photovoltaic Applications 163V.B. Patil and D.S. Sutrave

27. Studies on Photovoltaic Properties of SnS Thin Films 1698.1 RautandV.B. Patil

28. Photoelectrochemical Solar Cells with Cd, xPbxSe Thin Film Electrode 173S.I RautandV.B. Patil

29. Silicon Photodiodes for High Efficiency Photon Detection 178P.K. Singh, R. Gandotra, B.C. Chakravarty, S.N. Singh, S. Kumar andB.R. Singh

30. Smooth and Vertical Mirrors on MBE Grown n (100) 182GaAs by EtchingZahid Hasan Mahmood, Qamrun Nahar, KhandakarMd. Zahiruddin andJalalur Rahman

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31. Extremely Broadening Bandwidth of Superluminescent 187Diodes by Using Quantum Well Engineering and ObservingThree Novel EffectsG. Sh. Shmavonyan

32. Increasing the Efficiency of Photoelectrochemical Conversion of 191Solar EnergyG. Sh. Shmavonyan and T. Tchelidze

3 3. Generation-Recombination processes in B oron 196Implanted p-HgCdTeR. Pal, A. Malik, R. Manchanda, V. Mittal, R.K. Sharma, V. Dhar,R. Murlidharan and H.P. Vyas

34. Effect of Localized Shunt Resistance on Spectral Response of 201Silicon Solar CellPriyanka, M. Lai and S.N. Singh

35. Effect of Poly (Styrene-Acrylonitrile)Copolymer Interface 206Barrier Layer on X-Ray Sensitivity of Amorphous Selenium FilmsS. Chand, G.D. Sharma and S. Dwiwedi

36. Blue Shift in Photoluminescence Peak Position of Tris 211(8-Hydroxyquinoline) Metal Complex Thin Films Used asEmitting Layer in Organic Light Emitting DevicesVivek Kumar Shukla and Satyendra Kumar

37. Photoexcited Carrier Relaxation Dynamics in CdSe Nanocrystal 217Thin Films Prepared by Chemical Deposition at Different TemperaturesM.C. Rath, J.A. Mondal, H.N. Ghosh, D.K. Palit and T. Mukherjee

38. Photoluminescence Properties of Sol-Gel Derived Cu 222Doped ZnO FilmsA.B. Maity and S. Chaudhuri

39. Liquid Phase Epitaxy of HgCdTe for IR Detector Applications 227using a Novel Slider BoatA. Dixit, P.K. Sharma, N.K. Nayyar, Alka Dhar, R.K. Sharma and P.K. Basu

40. Characterisation of HgCdTe Processed Using Plasma Techniques 231B.A. Park, C.A. Musca, J.M. Dell, K.J. Winchester and L. Faraone

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41. Estimation of Front Surface Recombination Velocity of 235Minority Carriers For N+-P-P+ Silicon Solar Cells from ShortWavelength Spectral ResponseA.K. Sharma, S.K. Agarwal and S. N. Singh

42. Effect of Bias Light Intensity on Quantum Efficiency of 241Large-Area, Tandem Junction Amorphous Silicon Solar Cell ModulesB. Prasad, B. K. Pant, A. K. Saxena, S. Bhattacharya and R.K. Bhogra

Section B: Nanotechnology

Invited Papers

43. Multiscale Model for Germanium Quantum Dots in 249Semi-Infinite SiliconV.K. Tewary and D. T. Read

44. Characteristics of Germanium Nanocrystals for Flash 255Memory DevicesS. K. Ray, K. Das, A. Dhar and B. K. Mathur

45. Innovative Device Structures and New Materials for 262NanoelectronicsKrishna C. Saraswat, Chi On Chui, Tejas Krishnamohan and Ammar Nayfeh

46. Carbon Nanotubes- Novel Method of Synthesis and Energy 271Related ApplicationsS. Ramaprabhu

47. Field Emission from Carbon Nanotubes 278V. D. Vankar and Sanjay K. Srivastava

48. Nano-Bubbles/Cavities Induced by Rare Gas Implantation in 286SiO2: Application to Low-k DielectricsE. Ntsoenzok, H. Assaf and M. O. Ruault

49. Hetero-Epitaxial Growth of Low-Dimensional Phases and 293NanostructuresS.M. Shivaprasad

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50. Opportunities and Challenges Nanoelectronics 301Allen Hermann, Tapas Chaudhuri, Vijay Singh and R. S. Singh

51. SOI-Based Silicon Nanodevices 308

Yasuhiko Ishikawa, Ratno Nuryadi, Hiroya Ikeda and Michiharu Tabe

Contributed Papers

52. Synthesis and Characterisation of Silicon Nanoparticles by 319Chemical Vapour Deposition for NanoelectronicDevices ApplicationsA. Kumar, B.C. Joshi, A.K. Sharma, A. Karthigeyan,D.P. Runthala and R.P. Gupta

53. Variation in Structural Morphology of Carbon Nanomaterials 323by CCVD MethodDipti Porwal, K. Mukhopadhyay K. Ram and G.N. Mathur

54. Visible Photoluminescence from Ion-Implanted 327Silicon-On-SapphireRajesh Kumar, H.S. Mavi, A.K. Shukla and V.D. Vankar

55. Plasma Enhanced Chemical Vapour Deposition for CNT 331Growth Directly Over GlassP. Chaturvedi, S. Pal, Preeti Verma, U.S. Ojha, M. Kumar,R.K. Chaubey J.S.B.S. Rawat, M. Bal, P.K. ChaudharyP.K. Bhatnagar, Harsh and H.P. Vyas

56. Nanostructured Features of Thin Films of Zinc Oxide 335Harish Bahadur, A.K. Srivastava, S.C. Garg, A. Basu, Prem Pall andSudhir Chandra

57. Crystallite Size Distribution and Photoluminescence 339in Porous Silicon LayersMd. Nazrul Islam and Satyendra Kumar

58. Investigation of Dopant Distribution in Nanophosphors 343using TOF-Sims and Laser-SNMSB.R. Chakraborty D. Haranath and Harish Chander

XV

59. Phonon-Drag Thermopower and Hot Electron Energy 348Loss Rate of a One Dimensional Electron Gas inBloch-Gruneisen RegimeS.S. Kubakaddi

60. Carbon Nano Tubes (CNT's) for Microwave Vacuum Devices 353M. Kumar, S. Pal, P. Kumar, P. Chaturvedi, Preeti Verma, Neeraj Jain,D.S Rawal, J.S.B.S. Rawat, M. Bal, P. Ghosal, Harsh and H.P. Vyas

61. Electron Energy Loss Rate due to Confined Lo Phonons in 359Semiconductor Quantum WellsK.R. Usharaniand S.S. Kubakaddi

62. Luminescence Studies of ZnS:Mn Nanophosphors 363Harish Chander, D. Haranath and N. Karar

63. Luminescence Studies on YAG:Ce Nanophosphor for 367White Led ApplicationsD. Haranath, Harish Chander and Pooja Sharma

64. Origin of Non-Band Gap Luminescence in Pure 371Nanocrystalline ZnSN. Karar, Harish Chander and M. Kar

65. Electronic Properties of Hydrogenated Nanocrystalline 375Silicon Films Deposited by PECVDA. Bhardwaj, M. Dilshad, Sushil Kumar, C.M.S. Rauthan,S.S. Rajput and P.N. Dixit

66. Effect of Evolution of Powders in Silaneargon Plasma at 379Low Power Density on a-Si:H Samples PropertiesN. Dutta Gupta, C. Longeaud, A. Bhaduri, P. Chaudhuri andS. Vignoli and O. Marty

67. Study ofa-C:H Films Deposited from Methane-Argon 384Mixture on the Grounded and RF Powered Electrodes ofARF-PECVD UnitN. Dutta Gupta, C. Longeaud, A. Bhaduri and P. Chaudhuri

68. Amine Induced Surface Modification of TOPO-Capped 389CdSe NanocrystalsHimani Sharma, Shailesh N. Sharma, Gurmeet Singh and S.M. Shivaprasad

xvi

69. Ageing and Heat Treatment Studies in CdTe Quantum Dots 393Kriti Sharma, Praveen K. Pandey, Abhishek Verma, Swati Nagpal,P.K. Bhatnagar and PC. Mathur

70. Contribution of Metallic Carbon Nanotubes in a Bundle 377Sample Prepared by CVD TechniqueS.S. Islam, K.A. Shah, H.S. Mavi, A.K. Shukla and Harsh

71. Synthesis and Characterisations of CdSe Nanowires 402A. Loualiche, K. Yu-Zhang, D.Z. Guo, J. Mallet, M. Molinari and M. Troyon

72. Growth of Nanodiamond Films using C2H2 and AR 409Gaseous Mixture by Pulsed PECVD Technique

Sushil Kumar, C.M.S. Rauthan, Rishi Sharma, R.P. Gupta and P.N. Dixit

73. Study of Multiwalled Carbon Nanotubes (MWNTs) 413Growh on Fe-Pt Nanocrystalline FilmsSamina Khan, Monika Aggarwal, Zishan H. Khan, K.N. Tripathi,S.K. Agarwal and M. Husain

74. Transport Mechanism for Boolean Logic Implementation 417using Resonant Tunneling Diode Coupled Single-ElecronQuantum DOT DeviceS.S. Dan, M. Ray and C.K. Sarkar

75. Synthesis of Carbon Encapsulated Iron/Carbide Nanorods 422by Microwave Plasma Enhanced Chemical VaporDeposition TechniqueSanjay K. Srivastava, D.V. Sridhar Rao, Vasant D. Vankarand Vikram Kumar

76. Photoluminescence Characterisation of PbS Nanostructures 426Grown in Polyvinyl AlcoholNaresh Babu Pendyala and K.S.R. Koteswara Rao

11. Patterning of Silicon Surface with Pulsed Nd: YAG Laser Beam 431Brijesh Kumar and R.K. Soni

78. Carbon Nanotube Based Wireless Biological Sensors 435Kiran Aatre, Jining Xie, Jose Abraham, Vijay Veradan,Jitesh Veetil and Kaiming Ye

xvii

79. InxGa, xAs Quantum Dots: Structural Studies by Rheed, 440AFM and TEMD. V. Sridhara Rao, K. Muraleedharan, R. Balamuralikrishnan,T. Srinivasan, R. Muralidharan, P. Sen, and V.D. Vankar

80. Polymer-Capped Nanocrystalline ZnS Thin Films Prepared 444by Chemical ProcessR. Maity U.N. Maiti, S.F. Ahmed and K.K. Chattopadhyay

81. Structural and Optical Properties of ZnS Nanoparticles 449Synthesized by RF-Magnetron Sputtering TechniqueP. K. Ghosh, S. Nandy, S. Jana and K. K. Chattopadhyay

82. Influence of Quantum Confinement on the Einstein Relation in 454Heavily Doped Nonlinear Optical and Optoelectronic Materials:Simplified Theory and Suggestion for Experimental DeterminationK.P.Ghatak, D.De, S. Ghosal, S.N. Banerjee and J.P. Baneerjee

83. Quantum Correction Models for Modern Semiconductor Devices 458Martin Wagner, Markus Karnerand Tibor Grasser

84. On the Thermoelectric Power in Strained Layer Quantum 462Well Superlattices with Graded Interfaces in the Presenceof a Quantizing Magnetic FieldK.P.Ghatak, D.De, S. Ghosal, S.N. Banerjee and J.P. Baneerjee

85. Carbon Nanotubes and Their Applications : An Overview 466B. Jayaprakash and A. K. Goel

86. An Easy Way to Get 2D/3D Architecture of Carbon 470Nanotube BundlesKingsuk Mukhopadhyay Kanik Ram and K. U. Bhasker Rao

87. Functionalized Carbon Nanotube Electrodes for Supercapacitors 472A. Leela Mohana Reddy, M.M. Shaijumon andS. Ramaprabhu

88. Nanopatterning of GaAs Surface by Ar-Ion Irradiation 476S.K. Mohanta, R.K. Soni, S. Tripathy and S.J. Chua

xvlll

89 In Plane Optical Polarization Anisotropy of InAs/GaAs Self 480Assembled Quantum DotsJaymta Bhattacharyya, Sandlp Ghosh, Stefan Malzer,G /•/, Dohler and B.M, Arora

90. Visible Photoluminescence from Self-Assembled 484Go Quantum StructuresMunoj Kumar, H.S. MBVI, S, Rath, A,K, Shukls and V,D, Vankar

91. Synthesis oi Carbon Nanotubes by ECR 488Plasma-Assisted CVDMonika Aggarwal, Samina Khan, Zishan H. Khan, M. Zulfeqaur,S K. Agarwal and M. Husain

92. Structure and Electrical Characteristics of Nanocrystulline 492Nichrome Films

Vinayak, R.D.Shrivastava, Anshu Goyal, Robert Laishram,Anusnree Tomar, H.P.Vyas and V.D. Vankar

93. Growth of CdS Nanostruclures on Nano-Porous Alumina Template 497S.P. Mondal, R.K. Singha, K. Das, A. Dhar and S.K. Ray

94. Preparation of Nanocrystalline Zinc Oxide Powder by 501Hydrothermal RouteKiranJain, Rashmi, N. Karar and H.Chandra

Section C: Sensors and MEMS

Invited Papers

95 Polycrystalline Silicon on Insulator (PSOI) for 509MEMS ApplicationsK.N.Bhat, R.Joseph Daniel and Enakshi Bhattacharya

9b. MEMS for Tunable Infrared Sensor Arrays 515/.. Faraone

97. MEMS Based Accelerameter for Control of Environmental 521Pollution from AutomobilesSantiram Kal

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98. Progress of Soft Actuators Based on Conducting Polymers 529Kellchl Kaneto

99. Applications of MEMS Technology for NanosatellHes 535BrljN.Agrawal

Contributed Papers100. Fabrication and Characterisation of an lON-Sensitive 543

Field-Effect Transistor as ApH Sensor and for IonicConcentration Measurements in Aqueous Solutions of SaltsV. K. Khanna, A. Kumar, Y. K. Jain and S. Ahmad

101. Experimental Study and Physico-Chemical Analysis of the 547Response Characteristics of an ISFET (lON-SensitiveField-Effect Transistor)-Based Glucose Biosensor Exposed toVarious AnalytesV. K. Khanna, A. Kumar, Y. K. Jain and S. Ahmad

102. Development of Signal Conditioning Circuit for Direct 351Readout of pH by ION-Sensitive Field-Effect TransistorV. K. Khanna, G. R. Naik, D. K. Agrawal, A. Kumar, Y. K. Jain and S. Ahmad

103. Tin Oxide Gas Sensor: Effect of Various Dopants 554Abhilasha Srivastava, Rashmi and Kiran Jain

104. Optimisation of Polysilicon Piezoresistors for Pressure 558Sensor ApplicationS. R. Manjula, V.Vinoth Kumar, K.Sivakumar, EnakshiBhattacharyaandKN.Bhat

105. Sensitive Silicon and Porous Silicon Triglyceride Biosensors 562Arun Mathew, Ganesh Pandian, Anju Chadha and Enakshi Bhattacharya

106. Etch Stop Technique Release Cantilever Beam Assembly 565Ramjay Pal, Shanker Dutta, Praveen Kumar, Y.P. Khosla,Geeta Saxena, Jagbir Singh, O.P.Hooda, Surender Kumar, P. Dattaand S. K. Lomash

107. Design and Analysis of MEMS Based In-Plane Microneedle 568Shankar Dutta, Shaveta, D.K. Bhattacharya, P.Datta and S.K. Lomash

XX

108. Application of Thermoelectrics for Minituarized 572Adsorption CoolingBidyut Baran Saha, Anutosh Chakraborty, Shigeru Koyamaand Kirn Choon Ng

109. 3C-SIC Epitaxy for MEMS Applications 581S.E. Saddow, M. Reyes, M. Waits, S. HarveyY. Shishkin, B. Geil and J. T. Wolan

110. Anodic Bonding Micromachining of Silicon by 586ION-Cut TechniqueMB. Dutt, S.P. Chowdhury, A.K. Mishra andS.P. Gupta

111. Structural and Optical Properties of RF Sputtered Silicon 590Nitride Films for MEMSVivekanand Bhatt, C. M. Singal and Sudhir Chandra

112. Wireless Point-of-Care Monitoring of 594Neural Activity Using NEMSAshwin K. Whitchurch, Jose K. Abraham and Vijay K. Varadan

113. Pulsed Laser Deposited Palladium Thin Films: 599A Hydrogen SensorM. Krishna Kumar, M. S Ramachandra Rao and S. Ramaprabhu

114. Hydrogenated Amorphous Silicon as a Potential Material for 604Room Temperature BolometerV.K. Jain, Sushil Kumar, C.M.S. Rauthan, S.S.Rajput and P.N. Dixit

115. Microchannels for Microfluidic Applications 609Ranvir Singh, V.K.Saravanan, Amir Ahmad and Amita Gupta

116. Select Gas Absorpton in Carbon Nanotubes Loading a 614Microwave Resonant Cavity to Sense AirborneToxin GasesJ. A. Roberts, A. Anand and J. N. Dahiya

117. Fabrication of High Sensitivity Pressure Sensor Based 620on Porous SiliconL.Sujatha, V. Vinoth Kumar and Enakshi Bhattacharya

XXI

118. Symmetric Toggle Switch - An Electrostatic Low Actuation 025Voltage RF MEMS Switch for Wireless Communication:Varactor Configuration

KamalJ Rangra, B. Margesin, F. Giacomozzi and G. Soncini

Section D: VLSI and ULSI Technologies

Invited Papers

119. Material Parameter Identification for Interconnect Analysis 63.S

Stefan Holzerand Siegfried Selberherr

120. Material and Process Issues of Ni-Salicide Technology 642

Bing-Zong Li, Yu-Long Jiang, Guo-Ping Ru and Xin-Ping Qu

121. Recent Innovations in Schottky Rectifier Design 650

M. Jagadesh Kumar

122. Wideband Characteristics of Multigates MOS Devices 656

Vikram Passi and Jean-Pierre Raskin

123. Multi-Gate FETs for the Sub-65nm CMOS Technologies - 666Implications for Circuit Design

M.V. Rammohan Reddy, D.K. Sharma, M.B. Patil and V. Ramgopal Rao

124. Controlling Dopant Diffusion for Shallow Junctions 674

Amitabh Jain

125. Quantum and Spin Tunnel Devices for Memory Applications 678

Stephen Sudirgo, Sean L. Rommel and Santosh K. Kurinec

Contributed Papers126. Work Function for Pt-Ru Alloy Metal Gate Electrode for PMOs 691

R.M. Todi, K.B. Sundaram and K.R. Coffey

127. Electrical and Structural Characteristics of Cobalt-Nickel-Silicide 695Thin Films for Ultrashallow Junction Devices

D. Panda, A. Basar, A. Dhar and S.K. Ray

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128. Chemical Oxidation of Silicon to Grow Ultra Thin Oxide 701BinsuJ. Kallath, Vaibhav G. Marathe, Nandlta DasGupta andAmitava DasGupta

129. Realisation of Quantum Dot (QD) Boolean Logic Gate for 705Image Processing ApplicationsM. Ray, S.S. Dan and C.K. Sarkar

130. Study ofThinNIjSI Film Growth Dynamics at 710Low TemperatureYu-Long Jiang, Guo°Plng Ru, Xln-PIng Qu and Blng-Zong LI

131. Voltage Drop Analysis of PNP and NPN Punch-Through 715StructuresKhurshsd Ahmad Shsh

132. Hlgh=k Dielectric Material Properties and Thermodynamie 720Analysis of Layered Tl/HfO3/SiO3/Si Structure forInterface EngineeringR,K, N§har§ndAp§rn§ Bh@rm§

Author Index (VoU) 725Combined Author Index (Vok, I & II) 731