Harnessing Chirality in Ordered Carbon Nanotube Architectures at Wafer Scale

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dc.contributor.advisorKono, Junichiroen_US
dc.creatorDoumani, Jacquesen_US
dc.date.accessioned2024-08-30T18:39:45Zen_US
dc.date.created2024-08en_US
dc.date.issued2024-08-09en_US
dc.date.submittedAugust 2024en_US
dc.date.updated2024-08-30T18:39:45Zen_US
dc.descriptionEMBARGO NOTE: This item is embargoed until 2025-08-01en_US
dc.description.abstractHarnessing chirality can advance diverse technologies, encompassing displays, quantum light sources, secured communication, and biosensing. This thesis explores harnessing chirality in carbon nanotubes (CNTs) at wafer scales, focusing on molecular intrinsic and structurally engineered chirality. Significant advancements were made in alignment techniques, second harmonic generation (SHG) from aligned and chiral CNT films, and engineering structural chirality in CNTs. We developed techniques to enhance CNT alignment using controlled vacuum filtration, including linear reciprocating shaking, and introduced a novel SEM-based method for characterizing nematic order parameters. The AquaGold process was developed for monolayer precision thinning, achieving a wafer-scale aligned CNT film with a thickness of 2.3 nm and a packing factor of 1000 CNTs/μm. Through SHG measurements, we discovered significant second-order optical nonlinearity in wafer-scale, enantiomer-pure, aligned, and densely packed chiral (6,5)- CNT thin films. The only non-zero element of the second-order nonlinear optical susceptibility tensor reached approximately 1.5 nm/V, the highest value for 1D systems. We also fabricated wafer-scale chiral architectures of ordered CNTs with tunable and large circular dichroism. By controlling the stacking angle and handedness, we achieved a high deep-ultraviolet ellipticity of 40 mdeg/nm. These findings pave the way for applications in chiral photonics and opto-electronics.en_US
dc.embargo.lift2025-08-01en_US
dc.embargo.terms2025-08-01en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationDoumani, Jacques. Harnessing Chirality in Ordered Carbon Nanotube Architectures at Wafer Scale. (2024). PhD diss., Rice University. https://hdl.handle.net/1911/117840en_US
dc.identifier.urihttps://hdl.handle.net/1911/117840en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectNanomaterialsen_US
dc.subjectCarbon nanotubesen_US
dc.subjectChiropticsen_US
dc.subjectChiralityen_US
dc.subjectSecond harmonic generationen_US
dc.subjectQuantum opticsen_US
dc.subjectCircular dichroismen_US
dc.subjectControlled vacuum filtrationen_US
dc.subjectOpto-electronicsen_US
dc.subjectPhotonics.en_US
dc.titleHarnessing Chirality in Ordered Carbon Nanotube Architectures at Wafer Scaleen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentApplied Physicsen_US
thesis.degree.disciplineApplied Physics/Electrical Engen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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