Publication activity: 

• Chapters in monographs: 1
• Publications in scientific journals: 52
• Contributed lectures at conferences: +40
• Citations: +850
• h-Index: 19
• Editor and Guest Editor of Journals: 2

2022

• Bijalwan, V., Prajzler, V., Erhart, J., Velazquez, J.J., Galusek, D., Maca, K. Rapid pressureless sintering of barium titanate–based piezoceramics and their electromechanical harvesting performance (2022) Journal of the American Ceramic Society, 105 (11), pp. 6886-6897. DOI: 10.1111/jace.18602
• Rana, S., Velázquez, J.J., Jonnalagadda, S.B. Eco-Friendly Synthesis of Organo-Functionalized Mesoporous Silica for the Condensation Reaction (2022) Catalysts, 12 (10), art. no. 1212, DOI: 10.3390/catal12101212
• Rana, S., Velázquez, J.J., Jonnalagadda, S.B. Highly active reduced graphene oxide supported Ni nanoparticles for C-S coupling reactions (2022) Nanoscale Advances, 4 (15), pp. 3131-3135. DOI: 10.1039/d2na00316c

2021

• Dagupati, R., Klement, R., Rajavaram, R., Velázquez, J.J., Galusek, D. In situ synthesis of β-Na₅Y_1.5F₆: Er³⁺ crystals in oxyfluoride silicate glass for temperature sensors and their spectral conversion and optical thermometry analysis (2021) Molecules, 26 (22), 6901, DOI: 10.3390/molecules26226901
• Velázquez, J.J., Balda, R., Fernández, J., Gorni, G., Sedano, M., Durán, A., Galusek, D., Pascual, M.J. Structural and optical properties in Tm³⁺/Tm³⁺–Yb³⁺ doped NaLuF₄ glass-ceramics (2021) International Journal of Applied Glass Science, 12 (4), pp. 485-496. DOI: 10.1111/ijag.16322

2020

• Velázquez, J.J., Gorni, G., Balda, R., Fernández, J., Pascual, L., Durán, A., Pascual, M.J. Non-linear optical properties of Er³⁺–Yb3³⁺ doped NaGdF₄ nanostructured glass-ceramics (2020) Nanomaterials, 10 (7), art. no. 1425, pp. 1-13. DOI: 10.3390/nano10071425
• Gorni, G., Velazquez, J.J., Kochanowicz, M., Dorosz, D., Balda, R., Fernandez, J., Durán, A., Pascual, M.J. Tunable upconversion emission in NaLuF₄-glass-ceramic fibers doped with Er³⁺ and Yb³⁺ (2020) Proceedings of SPIE – The International Society for Optical Engineering, 11357, art. no. 113570B DOI: 10.1117/12.2558048

 2019

• J. Velázquez, J. Mosa, G. Gorni, R. Balda, J. Fernández, L. Pascual, A. Durán and Y. Castro, Transparent SiO₂-GdF₃ sol–gel nano-glass ceramics for optical applications, Journal of Sol-Gel Science and Technology 89 322–332 (2019) DOI: 10.1007/s10971-018-4693-z
• Velázquez, J.J., Mosa, J., Gorni, G., Balda, R., Fernández, J., Durán, A., Castro, Y. Novel sol-gel SiO₂-NaGdF₄ transparent nano-glass-ceramics (2019) Journal of Non-Crystalline Solids, 520, art. no. 119447, DOI: 10.1016/j.jnoncrysol.2019.05.023
• Balda, R., Velazquez, J.J., Gorni, G., Iparraguirre, I., Sedano, M., Durán, A., Pascual, M.J., Fernández, J. Color-tunable upconversion luminescence in Er³⁺-Yb³⁺ co-doped sodium lutetium fluoride glass-ceramics (2019) International Conference on Transparent Optical Networks, 2019-July, art. no. 8840294, DOI: 10.1109/ICTON.2019.8840294
• Gorni, G., Velázquez, J.J., Mosa, J., Mather, G.C., Serrano, A., Vila, M., Castro, G.R., Bravo, D., Balda, R., Fernández, J., Durán, A., Castro, Y. Transparent sol-gel oxyfluoride glass-ceramics with high crystalline fraction and study of re incorporation, (2019) Nanomaterials, 9 (4), art. no. 530, DOI: 10.3390/nano9040530
• Gorni, G., Velázquez, J.J., Kochanowicz, M., Dorosz, D., Balda, R., Fernández, J., Durán, A., Pascual, M.J. Tunable upconversion emission in NaLuF₄-glass-ceramic fibers doped with Er³⁺ and Yb³⁺ (2019) RSC Advances, 9 (54), pp. 31699-31707. DOI: 10.1039/c9ra05182a
• Cabral, A.A., Gorni, G., Velázquez, J.J., Pascual, M.J., Durán, A., Fernández, J., Balda, R. Phase-dependent emission of KLaF₄:Nd³⁺ nanocrystals in oxyfluoride glass-ceramics (2019) Proceedings of SPIE – The International Society for Optical Engineering, 10914, art. no. 109140S, DOI: 10.1117/12.2507266

2018

• G. Gorni, J.J. Velázquez, J. Mosa, R. Balda, J. Fernández, A. Durán and Y. Castro, Transparent Glass-Ceramics Produced by Sol-Gel: A Suitable Alternative for Photonic Materials, Materials 11 212 (2018)doi:10.3390/ma11020212
• J.J. Velázquez, R. Balda, J. Fernández, G. Gorni, G.C. Mather, L. Pascual, A. Durán, M.J. Pascual, Transparent glass-ceramics of sodium lutetium fluoride co-doped with erbium and ytterbium, Journal of Non-Crystalline Solids 501 136–144 (2018) DOI: 10.1016/j.jnoncrysol.2017.12.051
• J.J. Velázquez, R. Balda, J. Fernández, G. Gorni, L. Pascual, G. Chen, M. Sundararajan, A. Durán, M.J. Pascual, Transparent oxyfluoride glass-ceramics with NaGdF₄ nanocrystals doped with Pr³⁺ and Pr³⁺-Yb³⁺, Journal of Luminescence 193 61–69 (2018) DOI: 10.1016/j.jlumin.2017.07.034
• Giulio Gorni, Rolindes Balda, Joaquın Fernández, Jose J. Velázquez, Laura Pascual, Jadra Mosa, Alicia Durán and Yolanda Castro, 80SiO₂-20LaF₃ oxyfluoride glass ceramic coatings doped with Nd³⁺ for optical applications, International Journal of Applied Glass Science 9 208–217 (2018). DOI: 10.1111/ijag.12338
• Gorni, G., Pascual, M.J., Caballero, A., Velázquez, J.J., Mosa, J., Castro, Y., Durán, A. Crystallization mechanism in sol-gel oxyfluoride glass-ceramics (2018) Journal of Non-Crystalline Solids, 501, pp. 145-152. DOI: 10.1016/j.jnoncrysol.2018.01.031
• Cabral, A.A., Balda, R., Fernández, J., Gorni, G., Velázquez, J.J., Pascual, L., Durán, A., Pascual, M.J. Phase evolution of KLaF₄ nanocrystals and their effects on the photoluminescence of Nd³⁺ doped transparent oxyfluoride glass-ceramics (2018) CrystEngComm, 20 (38), pp. 5760-5771. DOI: 10.1039/c8ce00897c
• Balda, R., Gorni, G., Velázquez, J.J., Pascual, M.J., Durán, A., Fernández, J. Performance of Nd³⁺ As structural probe of rare-earth distribution in transparent nanostructured glass-ceramics (2018) NATO Science for Peace and Security Series B: Physics and Biophysics, pp. 297-313. DOI: 10.1007/978-94-024-1544-5_16

2017:

• Gorni, J.J. Velázquez, G.C. Mather, A. Durán, G. Chen, M. Sundararajan, R. Balda, J. Fernández, M.J. Pascual, Selective excitation in transparent oxyfluoride glass-ceramics doped with Nd³⁺, Journal of the European Ceramic Society 37 1695–1706 (2017) DOI: 10.1016/j.jeurceramsoc.2016.11.014
• J.J.  Velázquez, R. Fernández-González, L. Díaz, E. Pulido Melián, V.D. Rodríguez, P. Núñez, Effect of reaction temperature and sacrificial agent on the photocatalytic H₂-production of Pt-TiO₂ Journal of Alloys and Compounds 721 405-410 (2017) DOI: 10.1016/j.jallcom.2017.05.314
• Gorni, R. Balda, J. Fernández, I. Iparraguirre, J. J. Velázquez, Y. Castro, L. Pascual, G. Chen, M. Sundararajan, M. J. Pascual and A. Durán, Oxyfluoride glass–ceramic fibers doped with Nd³⁺: structural and optical characterization, CrystEngComm 19 6620 (2017) DOI: 10.1039/c7ce01380a

2016:

• Fernández-González, J. J. Velázquez, V. D. Rodríguez, F. Rivera-López, A. Lukowiak, A. Chiasera, M. Ferrari, R. R. Gonçalves, J. Marrero-Jerez, F. Lahoz and P. Núñez, Luminescence and structural analysis of Ce³⁺ and Er³⁺ doped and Ce³⁺–Er³⁺ codoped Ca₃Sc₂Si₃O₁₂ garnets: influence of the doping concentration in the energy transfer processes, RSC Advances, 6, 15054 (2016) DOI: 10.1039/c5ra22630a

2015:

• J. Velázquez, R. Fernández-González , J. Marrero-Jerez, V.D. Rodríguez, A. Lukowiak, A. Chiappini, A. Chiasera, M. Ferrari, P. Núñez, Structural and luminescence study of Ce³⁺ and Tb³⁺ doped Ca₃Sc₂Si₃O₁₂ garnets obtained by freeze-drying synthesis method, Optical Materials 46 109–114 (2015) DOI: 10.1016/j.optmat.2015.03.057
• J. Velázquez, A. C. Yanes, J. del-Castillo, C. Guzmán-Afonso, and V. D. Rodríguez, Dual Emission in Multiphase SiO₂–SnO₂–LaF₃ Nanostructured Glass-Ceramics for simultaneous UV and NIR Solar Spectrum Conversion, Science of Advanced Materials Vol. 7 1–6 (2015) DOI: 10.1166/sam.2015.2284

2013:

• Mikhail V. Shestakov, Liviu F. Chibotaru, Victor K. Tikhomirov, Vicente D. Rodriguez, Jose J. Velázquez and Victor V. Moshchalkov, Theory of the kinetics of luminescence and its temperature dependence for Ag nanoclusters dispersed in a glass host, Physical Chemistry Chemical Physics, 15 15949-15953 (2013) DOI: 1039/C3CP52681J
• Vicente D. Rodríguez, Victor K. Tikhomirov, Jose J. Velázquez, Mikhail V. Shestakov and Victor V. Moshchalkov, Visible-to-UV/Violet Upconversion Dynamics in Er³⁺ -Doped Oxyfluoride Nanoscale Glass Ceramics, Advanced Optical Materials 1 747-752 (2013) DOI: 1002/adom.201300212
• Rodríguez, V.D., Tikhomirov, V.K., Velázquez, J.J., Shestakov, M.V., Moshchalkov, V.V. Visible-to-UV/Violet upconversion dynamics in Er³⁺-doped oxyfluoride nanoscale glass ceramics (2013) Advanced Optical Materials, 1 (10), pp. 747-752. DOI: 10.1002/adom.201300212
• Shestakov, M.V., Meledina, M., Turner, S., Tikhomirov, V.K., Verellen, N., Rodríguez, V.D., Velázquez, J.J., Van Tendeloo, G., Moshchalkov, V.V. The size and structure of Ag particles responsible for surface plasmon effects and luminescence in Ag homogeneously doped bulk glass (2013) Journal of Applied Physics, 114 (7), art. no. 073102, . DOI: 10.1063/1.4818830

2012:

• J. Velázquez, V.K. Tikhomirov, L.F. Chibotaru, N.T. Cuong, A.S. Kuznetsov, V.D. Rodríguez, M.T. Nguyen and V.V. Moshchalkov, Energy level diagram and kinetics of luminescence of Ag nanoclusters dispersed in a glass host, Optics express, 20 13582 (2012) DOI: 10.1364/OE.20.013582
• S. Kuznetsov, J.J. Velázquez, V.K. Tikhomirov, J. Mendez-Ramos and V.V. Moshchalkov, Quantum yield of luminescence of Ag nanoclusters dispersed within transparent bulk glass vs. glass composition and temperature, Applied physics letters 101, 251106 (2012) DOI: 10.1063/1.4772957
• J. Velázquez, V.D. Rodríguez, A.C. Yanes, J. del-Castillo, J. Méndez-Ramos, Down-shifting in Ce³⁺–Tb³⁺ co-doped SiO₂–LaF₃ nano-glass–ceramics for photon conversion in solar cells, Optical Materials 34 1994–1997 (2012) DOI: 10.1016/j.optmat.2011.12.020

2010:

• J. Velázquez, A.C. Yanes, J. del-Castillo, J. Méndez-Ramos, V.D. Rodríguez, Spectroscopic characterization and up-conversion in sol–gel derived Yb³⁺–Pr³⁺ co-doped SiO₂–LaF₃ nano-glass-ceramics, Journal of Non-Crystalline Solids 356 1349–1353 (2010) DOI: 10.1016/j.jnoncrysol.2010.03.001

2009:

• C. Yanes, J. J. Velázquez, J. del-Castillo, J. Méndez-Ramos and V. D. Rodríguez, Colour tuneability and white light generation in Yb³⁺–Ho³⁺–Tm³⁺ co-doped SiO₂–LaF₃ nano-glass-ceramics prepared by sol–gel method, Journal of Sol-Gel Science and Technology 51 4–9 (2009) DOI 10.1007/s10971-009-1924-3
• del-Castillo, J., Yanes, A.C., Velázquez, J.J., Méndez-Ramos, J., Rodríguez, V.D. Luminescent properties of Eu³⁺-Tb³⁺-doped SiO₂-SnO₂-based nano-glass-ceramics prepared by sol-gel method (2009) Journal of Alloys and Compounds, 473 (1-2), pp. 571-575. DOI: 10.1016/j.jallcom.2008.06.048

2008:

• C. Yanes, J.J. Velázquez, J del-Castillo, J Méndez-Ramos and V D Rodríguez, Site-selective spectroscopy in Sm³⁺-doped sol–gel-derived nano-glass-ceramics containing SnO₂ quantum dots, Nanotechnology 19 295707 (2008) doi:10.1088/0957-4484/19/29/295707
• del-Castillo, J., Méndez-Ramos, J., Yanes, A.C., Velázquez, J.J., Rodríguez, V.D. Gain cross-section of 1.06 μm emission in Nd³⁺-doped SiO₂-LaF₃ glass-ceramics prepared by sol-gel method (2008) Journal of Non-Crystalline Solids, 354 (18), pp. 2000-2003. DOI: 10.1016/j.jnoncrysol.2007.11.009

2007

• Velazquez, J.J., Yanes, A.C., Del Castillo, J., Méndez-Ramos, J., Rodríguez, V.D. Optical properties of Ho³⁺-Yb³⁺ co-doped nanostructured SiO₂-LaF₃ glass-ceramics prepared by sol-gel method (2007) Physica Status Solidi (A) Applications and Materials Science, 204 (6), pp. 1762-1768. DOI: 10.1002/pssa.200675349

Doctoral studies:

Study part: Profile subjects:

Inorganic technologies and materials II

Modules:

Nanomaterials for optical applications, Fundamentals of colloidal chemistry, Collodial systems: cheracterization and utilization,

Scientific part:

Supervisor of PhD. students

Experimental work I-IX, Publication activity I and II, Active participation in a conference I and II

Previous teaching activities:

• Name of the course: Physics II. Type of teaching: Laboratory work. Type of subject: Obligatory. University degree: Bachelor’s Degree in Mechanical Engineering. Hours/ECTS credits: 30. Entity: Universidad de La Laguna, Depart. of Basic Physics.
• Name of the course: Physics II. Type of program: Engineering Type of teaching: Laboratory work. Type of subject: Obligatory. University degree: Bachelor’s degree in Electronics, Industrial, and Automation Engineering. Hours/ECTS credits: 30. Entity: Universidad de La Laguna, Technics School of Electronics, Industrial and Automation Engineering. Department: Depart of Basic Physics
• Name of the course: Expanding Optics. Type of program: Bachelor’s degree Type of teaching: Laboratory work Type of subject: Optional. University degree: Bachelor’s degree in Physics: Applied Physics. Hours/ECTS credits 40. Entity: Universidad de La Laguna, Depart of Fundamental and Experimental Physics; Electronica and System.
• Name of the course: Applied Physical Fundamentals of Engineering. Type of program: Engineering Type of teaching: Laboratory work. Type of subject: Obligatory. University degree: Degree in Nautical Engineering and Maritime Transport and Naval Radio Electronics. Hours/ECTS credits: 10 Entity: Universidad de La Laguna, Depart. Basic Physics.
• Name of the course: Nanomaterials. Structural and Optical Characterization Type of program: Master in Physics: Materials Structure. Type of subject: Obligatory. End date: 2011. Hours/ECTS credits: 10 Entity: Universidad de La Laguna, Department: Depart. Basic Physics.

Experience supervising doctoral thesis and/or final-year projects

• Dissertation topic: Novel Binary Semiconductor-Based Materials for Sustainable and Clean Energy: from Synthesis to H2 Generation. Muhammad Umer Iqbal, MSc. Supervisor: Dr. Jose Joaquin Velazquez Garcia, Prof. Lothar Wondraczek (Otto-Schott Institute, Jena). In progress. Starting date: 05.03.2022
• Dissertation topic: Multifunctional glass coatings by sol-gel for different application. Haritha Ajitha Haridasa, MSc. Co-supervisor: Dr. Jose Joaquin Velazquez Garcia, Dr. Yolanda Castro Martin. In progress. Starting date: 25.11.2019.
• Project title: Transparent nano-glass ceramics produced by sol-gel as bulk materials. Type of project: Final year project. Co-director of thesis: Jadra Mosa; Jose J. Velazquez; Yolanda Castro. Entity: Université de Rennes-IUT Saint-Brieuc. Student: Josselin BROUSTAL. Date of reading: 01/07/2017. Quality recognition: Yes
• Project title: Revêtement nanostructuré transparent SiO2/GdF3 préparé par sol-gel avec des propiétés photoniques. Type of project: Final year project. Co-director of thesis: Jadra Mosa; Jose J. Velazquez. Entity: Université de Rennes-IUT Saint-Brieuc. Student: Marin Michel Date of reading: 28/06/2016. Quality recognition: Yes.
• Project title: RE doped transparent oxyfluoride nano glassceramics obtained by melting for use in fibers. Type of project: Minor thesis. Co-director of thesis: Alicia Duran; Jose J. Velazquez; Giulio Gorni, Entity: Univ. IUT Saint-Brieuc Type of entity: University. City of entity: Rennes, France. Student: Malo Picaud. Date of reading: 16/06/2016

Extracurricular Teaching

• Description of the activity: Renewable energies: present situation, basic concepts, and dimensioning facilities in Canarias, Organizing entity: FUNDACION EMPRESA-UNIVERSIDAD DE LA LAGUNA End date: 18/03/2016
• Description of the activity: interdisciplinary course: Scientists, discoveries, and technological advances that have changed the world. City of activity: San Cristobal de La Laguna, Canary Islands, Spain. Organizing entity: Universidad de La Laguna Type of entity: University. End date: 09/10/2015
• Description of the activity: Renewable energies: present situation, basic concepts, and dimensioning facilities in Canarias. Organizing entity: FUNDACION EMPRESA-UNIVERSIDAD DE LA LAGUNA. End date: 02/03/2015
• Description of the activity: XXI century: the challenge of renewable energy and energy efficiency in the Canary Islands. Organizing entity: Universidad de La Laguna-Ayuntamiento de Adeje. End date: 21/07/2014

Education:

• 2005: BSc: Universidad de La Laguna (ULL), Faculty of Physics
• 2007: DEA (Diploma de Estudios Avanzados): Universidad de La Laguna (ULL), Faculty of Physics; Department Applied Physics, Diploma Thesis: Luminescent Nanostructured Materials; Synthesis and Characterization
• 2013: PhD: Universidad de La Laguna (ULL), Faculty of Physics; Department of Applied Physics; PhD thesis: Lanthanides ions doped glass-ceramics based on insulating and/or semiconductors nanocrystals dispersed in SiO2. Synthesis, structural and spectroscopic characterization

Awards, scholarships and research stays:

• Cajacanarias Grants for Central Research Services –ULL: Thermal Analysis Service, Universidad de La Laguna, La Laguna, Spain, 2007
• Cajacanarias Grants for Central Research Services –ULL: Magnetic Measurements Service, Universidad de La Laguna, La Laguna, Spain, 2008
• Cajacanarias Grants for Central Research Services –ULL: Thermal Analysis Service, Universidad de La Laguna, La Laguna, Spain, 2009
• FPI grant, Agencia Canaria de Investigación, Innovación y Sociedad de la Información (ACIISI) and European Social Fund, Universidad de La Laguna, La Laguna, Spain, 2009-2013
• 2010 Short Estays Grant, Agencia Canaria de Investigación, Innovación y Sociedad de la Información (ACIISI) and European Social Fund, Institutute For Nanoscale Physics and Chemistry (INPAC), Katholieke Universiteit Leuven (KUL), Leuven, Belgium, 2010
• 2012 Short Estays Grant, Agencia Canaria de Investigación, Innovación y Sociedad de la Información (ACIISI) and European Social Fund, CNRS- Institute for Photonics and Nanotechnologies (IFN), Trento, Italy, 2013
• 2013 Postdoctoral Training contracts grants, GlaSS group, Glass Department, Ceramic and Glass Institute (ICV-CSIC), Madrid, Spain, 2015-2017
• 2014, Doctorate Extraordinary Award, Universidad de La Laguna (ULL), La Laguna, Spain
• 2017, Posdoctoral contract, GlaSS group, Glass Department, Ceramic and Glass Institute (ICV-CSIC), Madrid, Spain, 2017-2018

Other activities:

• Sociedad Española de Ceramica y Vidrio, member
• European Ceramic Society, member
• Slovak Glass society, Member
• Member of Organisation Committees of 3 young researcher workshops
• Member of Organisation Committee of 1 international conference