001484222 000__ 03718cam\\22005297i\4500 001484222 001__ 1484222 001484222 003__ OCoLC 001484222 005__ 20240117003317.0 001484222 006__ m\\\\\o\\d\\\\\\\\ 001484222 007__ cr\un\nnnunnun 001484222 008__ 231121s2023\\\\sz\a\\\\ob\\\\000\0\eng\d 001484222 020__ $$a9783031443329$$q(electronic bk.) 001484222 020__ $$a3031443322$$q(electronic bk.) 001484222 020__ $$z9783031443312 001484222 0247_ $$a10.1007/978-3-031-44332-9$$2doi 001484222 035__ $$aSP(OCoLC)1410124968 001484222 040__ $$aGW5XE$$beng$$erda$$epn$$cGW5XE$$dEBLCP$$dOCLCO 001484222 049__ $$aISEA 001484222 050_4 $$aQC184 001484222 08204 $$a539.7/7$$223/eng/20231121 001484222 1001_ $$aHillberry, Logan Edward,$$eauthor. 001484222 24510 $$aOptically trapped microspheres as sensors of mass and sound :$$bBrownian motion as both signal and noise /$$cLogan Edward Hillberry. 001484222 264_1 $$aCham :$$bSpringer,$$c2023. 001484222 300__ $$a1 online resource (xvi, 115 pages) :$$billustrations (some color). 001484222 336__ $$atext$$btxt$$2rdacontent 001484222 337__ $$acomputer$$bc$$2rdamedia 001484222 338__ $$aonline resource$$bcr$$2rdacarrier 001484222 4901_ $$aSpringer theses,$$x2190-5061 001484222 500__ $$a"Doctoral thesis accepted by the University of Texas at Austin, USA." 001484222 504__ $$aIncludes bibliographical references. 001484222 5050_ $$aChapter 1. Introduction -- Chapter 2. Technical Background -- Chapter 3. Experimental set-up -- Chapter 4. Results -- Chapter 5. Conclusions. 001484222 506__ $$aAccess limited to authorized users. 001484222 520__ $$aThis thesis makes significant advances in the use of microspheres in optical traps as highly precise sensing platforms. While optically trapped microspheres have recently proven their dominance in aqueous and vacuum environments, achieving state-of-the-art measurements of miniscule forces and torques, their sensitivity to perturbations in air has remained relatively unexplored. This thesis shows that, by uniquely operating in air and measuring its thermally-fluctuating instantaneous velocity, an optically trapped microsphere is an ultra-sensitive probe of both mass and sound. The mass of the microsphere is determined with similar accuracy to competitive methods but in a fraction of the measurement time and all while maintaining thermal equilibrium, unlike alternative methods. As an acoustic transducer, the air-based microsphere is uniquely sensitive to the velocity of sound, as opposed to the pressure measured by a traditional microphone. By comparison to state-of-the-art commercially-available velocity and pressure sensors, including the world⁰́b9s smallest measurement microphone, the microsphere sensing modality is shown to be both accurate and to have superior sensitivity at high frequencies. Applications for such high-frequency acoustic sensing include dosage monitoring in proton therapy for cancer and event discrimination in bubble chamber searches for dark matter. In addition to reporting these scientific results, the thesis is pedagogically organized to present the relevant history, theory, and technology in a straightforward way. 001484222 588__ $$aOnline resource; title from PDF title page (SpringerLink, viewed November 21, 2023). 001484222 650_0 $$aBrownian motion processes. 001484222 650_0 $$aMicrospheres. 001484222 650_6 $$aProcessus de mouvement brownien. 001484222 655_0 $$aElectronic books. 001484222 830_0 $$aSpringer theses,$$x2190-5061 001484222 852__ $$bebk 001484222 85640 $$3Springer Nature$$uhttps://univsouthin.idm.oclc.org/login?url=https://link.springer.com/10.1007/978-3-031-44332-9$$zOnline Access$$91397441.1 001484222 909CO $$ooai:library.usi.edu:1484222$$pGLOBAL_SET 001484222 980__ $$aBIB 001484222 980__ $$aEBOOK 001484222 982__ $$aEbook 001484222 983__ $$aOnline 001484222 994__ $$a92$$bISE