Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for +publisher:"Rutgers University" +contributor:("Vittadello, Michele"). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Rutgers University

1. Sun, Jingjing, 1977-. Micropen direct-write technique for fabrication of advanced electroceramic and optical materials:.

Degree: PhD, Materials Science and Engineering, 2010, Rutgers University

Direct-write technologies, a subset of the rapid prototyping, have been applied for many applications including electronics, photonics and biomedical engineering. Among them, MicropenTM is a promising technique, providing precision deposition of materials with various viscosities, on-line design changes and writing on nonplanar substrates. The objective of this project was to directly write two- and three-dimensional novel structures by MicropenTM for potential optical and transducer applications. First, to gain a basic understanding of MicropenTM operation, poly(methyl methacrylate) (PMMA) solutions were developed as a model system. The effects of solution rheological properties on deposition conditions were investigated. Secondly, PMMA/SiO2 hybrids were developed using sol-gel process. The effects of organic/inorganic ratios on thermal stability, microstructure and optical properties were studied. The solution with 80 wt% PMMA loading was chosen to deposit lines for optical applications. Another application was the direct-write of lead zirconate titanate (PZT) thick films (6-70 µm) for MEMS or high frequency medical imaging applications. Pastes consisting of 15-30 vol% ceramic loading in a sol-gel solution were prepared for the deposition of films on various substrates. The PZT sol was used as a binder as well as to achieve low temperature heat treatment of the films. Using the 15 vol% paste with a 250-µm pen tip, a four-layer film was deposited on a silicon substrate. This 16-µm film with 1 cm2 area had K of 870, tanδ of 4.1%, Pr of 12.2 µC/cm2 and Ec of 27 kV/cm. Furthermore, MicropenTM was utilized for the direct-write of ceramic skeletal structures to develop PZT ceramic/polymer composites with 2-2 connectivity for medical ultrasound transducers. Ceramic/binder based pastes were developed as writing materials. The 35 vol% paste exhibited shear thinning with a viscosity of 45 Pa•s at lower shear rate and 3 Pa•s at higher shear rate. Using a 100-µm pen tip, the fabricated composite with ~360 µm height had resonance frequencies of ~4 MHz, and electromechanical properties of K=650, tanδ=2.1%, kt=0.60 and d33=210 pC/N. Finally, composites with linear and Gaussian volume fraction gradients were fabricated by MicropenTM. Their vibration amplitude profiles showed maximum output at center with gradual decreasing towards edge of the composites.

Advisors/Committee Members: Sun, Jingjing, 1977- (author), Safari, Ahmad (chair), Klein, Lisa (internal member), Danforth, Stephen (internal member), Vittadello, Michele (outside member).

Subjects/Keywords: Rapid prototyping; Microelectromechanical systems

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sun, Jingjing, 1. (2010). Micropen direct-write technique for fabrication of advanced electroceramic and optical materials:. (Doctoral Dissertation). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052155

Chicago Manual of Style (16th Edition):

Sun, Jingjing, 1977-. “Micropen direct-write technique for fabrication of advanced electroceramic and optical materials:.” 2010. Doctoral Dissertation, Rutgers University. Accessed July 10, 2020. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052155.

MLA Handbook (7th Edition):

Sun, Jingjing, 1977-. “Micropen direct-write technique for fabrication of advanced electroceramic and optical materials:.” 2010. Web. 10 Jul 2020.

Vancouver:

Sun, Jingjing 1. Micropen direct-write technique for fabrication of advanced electroceramic and optical materials:. [Internet] [Doctoral dissertation]. Rutgers University; 2010. [cited 2020 Jul 10]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052155.

Council of Science Editors:

Sun, Jingjing 1. Micropen direct-write technique for fabrication of advanced electroceramic and optical materials:. [Doctoral Dissertation]. Rutgers University; 2010. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052155


Rutgers University

2. Harrold Jr., John W., 1981-. Assembly of natural photosynthetic components on graphene oxide and gold surfaces for light energy transduction.

Degree: PhD, Chemistry and Chemical Biology, 2014, Rutgers University

Photosynthetic reaction centers are integral membrane proteins of particular interest for their remarkable ability to catalyze photo-induced charge separation with high quantum efficiency. For this reason they have been targeted for integration in biohybrid systems for capture and conversion of solar energy. In this study isolated photosynthetic core complexes from phototrophic organisms are interfaced with conductive materials for the development of photoelectrochemical systems. Photosystem II core complexes (PSII CCs) bearing poly histidine tags isolated from genetically modified Thermosynechococcus elongatus, were tethered to a graphene oxide (GO) support through immobilized metal coordination sites. The PSII CCs tethered to GO-coated gold electrodes and GO nanosheets in suspension showed 59% retention of quantum yield of photochemistry. Fluorescence kinetic relaxation analyses indicates that a direct electron transfer occurs between embedded quinone (QA) of PSII and GO. Flash oxygen evolution activity shows a threefold improvement in comparison with isolate PSII in suspension. Photosystem I core complexes (PSI CCs) isolated from Synnehcoccous PCC 7002 was also immobilized on GO. The co-immobilization of PSII and PSI on GO resulted in a biohybrid electron transport chain on the model of the photosynthetic Z-scheme. As a robust alternative to PSII, a very labile enzyme, chromatophores isolated from the bacterium Rhodospirillum rubrum were adsorbed on gold electrodes. These intracytoplasmic membrane vesicles containing bacterial type II reaction centers yielded a maximum photo-driven current of 1.5 μA/cm2 that slowly declined in a week. This study demonstrates the utility of bottom-up reconstruction of biological nanostructure as a platform for fundamental experimental approaches and the pursuit of new paradigms toward renewable energy resources.

Advisors/Committee Members: Falkowski, Paul G (chair), Garfunkel, Eric (internal member), Cotter, Martha (internal member), Niederman, Robert (internal member), Vittadello, Michele (outside member).

Subjects/Keywords: Graphene; Photosynthesis

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Harrold Jr., John W., 1. (2014). Assembly of natural photosynthetic components on graphene oxide and gold surfaces for light energy transduction. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/45288/

Chicago Manual of Style (16th Edition):

Harrold Jr., John W., 1981-. “Assembly of natural photosynthetic components on graphene oxide and gold surfaces for light energy transduction.” 2014. Doctoral Dissertation, Rutgers University. Accessed July 10, 2020. https://rucore.libraries.rutgers.edu/rutgers-lib/45288/.

MLA Handbook (7th Edition):

Harrold Jr., John W., 1981-. “Assembly of natural photosynthetic components on graphene oxide and gold surfaces for light energy transduction.” 2014. Web. 10 Jul 2020.

Vancouver:

Harrold Jr., John W. 1. Assembly of natural photosynthetic components on graphene oxide and gold surfaces for light energy transduction. [Internet] [Doctoral dissertation]. Rutgers University; 2014. [cited 2020 Jul 10]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45288/.

Council of Science Editors:

Harrold Jr., John W. 1. Assembly of natural photosynthetic components on graphene oxide and gold surfaces for light energy transduction. [Doctoral Dissertation]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45288/

.