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• Dr. Vankayala has delivered a series of four lectures as a part of the Global Lecture Program held at Taipei Medical University , Organized by Wiley Publishing Group (06/2023)

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• Invited as a speaker at Department of Biotechnology, Mahila PG Mahavidayalya , Jodhpur on the ocassion of National Science Day (02/2022)​

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• Invited as a speaker at WEE-2021 at Department of Chemistry, GITAM College of Science, India, and delivered a talk entitled "Theranostic Nanomedicines: Translating from Bench to Bedside and Beyond" (01/2021).

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• Invited as a colloquium speaker in the Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan and delivered a talk entitled “Inorganic and Biomimetic Nanostructures for Theranostic Applications” (01/2020).​

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•  Invited as a colloquium speaker in the Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung, Taiwan and delivered a talk entitled “Engineering Inorganic and Biomimetic Nanostructures for Theranostic Applications” (01/2020). ​

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• Invited as a speaker in a two-day national webinar on Analytical and Diagnostic tools in Lifesciences organized by Andhra University and Andhra Pradesh Akademi of Sciences, Visakhapatnam, and delivered a talk entitled “Engineering Inorganic and Biomimetic Nanostructures for Theranostic Applications” (06/ 2020). ​

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• Invited as a speaker in a national webinar organized by Vignan College of Pharmacy, Guntur, and delivered a talk entitled “Engineering Inorganic and Biomimetic Nanostructures for Theranostic Applications” (06/2020).​

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• Invited as a speaker at KPR Institute of Engineering and Technology (KPRIET), Coimbatore, and delivered a talk entitled “Nanomaterials for Biomedical Applications” (07/2020).​

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• ​Invited as a colloquium speaker in the Department of Chemistry, GITAM College of Science, India, and delivered a talk entitled “Engineering Multi-Functional Nanostructures Derived from Inorganic and Biological Materials for Light-Based Theranostics” (08/2019).​

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• ​Invited as a colloquium speaker in the Department of Chemistry, IIT Hyderabad, Telangana, India and delivered a talk entitled “Engineering Multi-Functional Nanostructures Derived from Inorganic and Biological Materials for Light-Based Theranostics” (08/2018).

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• Raviraj Vankayala, Jenny. T. Mac, Edver Bahena, Bahman Anvari, "Virus-mimicking Hybrid Nanostructures Containing Indocyanine Green and Albumin for Near-Infrared Fluorescence Imaging of Ovarian Cancer Cells," in Optics in the Life Sciences Congress 2017, San Diego, USA (04/2017).

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• Invited as a colloquium speaker in the Department of Bioengineering, University of California Riverside and delivered a talk entitled “Engineering Multi-Functional Nanostructures Derived from Inorganic, Organic and Biological Materials for Light-Based Theranostics” (03/2017).​

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• Invited as a colloquium speaker in the Department of Biomedical Engineering, IIT-BHU, Varanasi, India and delivered a talk entitled “Designing Multi-functional Nano‘bullets’ for Cancer Theranostics” (03/2016).​

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• Raviraj Vankayala, Joshua M. Burns, Jenny T. Mac, Bahman Anvari, “Light-Based Theranostics using Hybrid Structures Derived from Biological and Organic Materials”, SPIE Optics and Photonics 2016, San Diego, CA, USA (08/2016).

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•  Raviraj Vankayala, Yu-Kuan Huang, Poliraju Kalluru, Chi-Shiun Chiang, Kuo Chu Hwang, “First Demonstration of Gold Nanorods-Mediated Photodynamic Therapeutic Destruction of Tumors via Near Infra-Red Light Activation”, Spring Symposium of Photochemistry Association in Taiwan, Hsinchu, Taiwan (01/2015).

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• Raviraj Vankayala, Chien-Lin Kuo, Karthik Nuthalapati, Chi-Shiun Chiang, Kuo Chu Hwang, “Nucleus Targeting Gold Nanoclusters for Simultaneous in vivo Fluorescence Imaging, Gene Delivery and NIR Light-Activated Photodynamic Therapy”, NANOS 2015, GITAM University, India (12/2015).​​