Manufacturing of graphene nanodisks for surface plasmon measurements

Grafeeni on ilmestynyt tieteen rintamalle kovalla ryminällä vasta viimeisen 13 vuoden aikana, mutta on jo nyt yksi mielenkiintoisimmista tutkimuskohteista, jolla voisi olla lukuisia sovelluksia tulevaisuudessa. Grafeeni on ilmestynyt myös plasmoniikan tutkimuskohteeksi sen lukuisten ainutlaatuisten...

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Päätekijä: Hakkola, Niko-Ville
Muut tekijät: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Fysiikan laitos, Department of Physics, University of Jyväskylä, Jyväskylän yliopisto
Aineistotyyppi: Pro gradu
Kieli:eng
Julkaistu: 2017
Aiheet:
Linkit: https://jyx.jyu.fi/handle/123456789/56284
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author Hakkola, Niko-Ville
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics University of Jyväskylä Jyväskylän yliopisto
author_facet Hakkola, Niko-Ville Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics University of Jyväskylä Jyväskylän yliopisto Hakkola, Niko-Ville Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics University of Jyväskylä Jyväskylän yliopisto
author_sort Hakkola, Niko-Ville
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description Grafeeni on ilmestynyt tieteen rintamalle kovalla ryminällä vasta viimeisen 13 vuoden aikana, mutta on jo nyt yksi mielenkiintoisimmista tutkimuskohteista, jolla voisi olla lukuisia sovelluksia tulevaisuudessa. Grafeeni on ilmestynyt myös plasmoniikan tutkimuskohteeksi sen lukuisten ainutlaatuisten sähköisten ja optisten ominaisuuksien takia ja sen ominaisuuksien muokattavuuden helppouden takia. Grafeeni voisi mahdollisesti korvata yleisesti käytössä olleet jalot metallit kuten kullan ja hopean pintaplasmonien tuotossa ja tutkimuksessa ja voisi johtaa uudenlaiseen valon kontrollointiin nanoskaalassa ja optiikan ja elektroniikan yhdistämiseen tässä pienessä mittakaavassa. Tässä työssä tavoitteena oli "hole-mask colloidal"-litografiamenetelmän muokkaaminen ja tarvittavien valmistusvaiheiden tutkiminen ja kehitys. Tavoitteena oli saada tehtyä näytteitä, joilla olisi 200 nm kokoisia grafeeninanokiekkoja sopivalla etäisyydellä toisistaan ja jotka kattaisivat suurimman osan näytteen pinnasta. Näitä grafeeninanokiekkoja tutkittaisiin sitten infrapunaspektroskopialla. Tavoitteena olisi saada näkyviin pintaplasmoneista johtuvia resonansseja spektreissä sekä näiden voimakkuuden ja aallonpituuden muuttaminen sähköisellä seostamisella eli tässä tapauksessa tuomalla eri vahvuista hilajännitettä grafeenikiekoille. Grafeeninanokiekkojen valmistus onnistui kohtuullisen hyvin ja varsin luotettava valmistusmenetelmä saatiin kehitettyä, vaikkakin jonkinlaista epäpuhtautta näytteisiin jäikin todennäköisesti asetonipuhdistuksesta johtuen. Pintaplasmonimittaukset eivät sen sijaan onnistuneet lainkaan eikä plasmoniresonansseja saatu näkyviin missään näytteissä. Tälle voisi useitakin syitä löytyä, mutta mahdollisesti käytetty grafeeni ei ollut kovin hyvää näitä mittauksia ajatellen tai käytetty spektrometri ei ollut tarpeeksi hyvä näin ohuiden näytteiden mittaamiseen. Mittauksia olisi voitu myös parantaa, jos näytteiden pinta-alasta suurempi osa olisi sisältänyt grafeeninanokiekkoja. Graphene has emerged as a promising candidate to replace noble metals as a plasmonic material due to its unique properties and tunability. Graphene plasmonics offer possibilities of controlling light in nanoscale devices and merging optics with electronics. The goal of this thesis was to modify a hole-mask colloidal lithography method to find out a fabrication method that could be used to manufacture samples of a randomly organized array of 200 nm sized graphene nanodisks with some distance between them and with a good amount of the sample covered by the nanodisks. These graphene nanodisks would then be studied for their surface plasmon properties by measuring their infrared spectra with a Fourier-transform infrared (FTIR) spectroscope. The energies and strengths of these surface plasmons in graphene nanodisks can be tuned by electrical doping which was studied as well. The manufacturing of graphene nanodisks was rather successful. A fairly reliable method to produce nanodisks was successfully developed with arrangement and amount of nanodisks just as desired but with some impurities still left in the samples, probably due to the final removal and cleaning with acetone. However, the surface plasmon measurements were a failure and no plasmons could be seen in any of the samples which could be due to multiple reasons such as the graphene not being good enough for measurements or the spectroscope not being able to reliably measure these extremely thin samples. The measurements could have been improved by an even better coverage of the graphene nanodisks in the samples.
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Grafeeni on ilmestynyt my\u00f6s plasmoniikan tutkimuskohteeksi sen lukuisten ainutlaatuisten s\u00e4hk\u00f6isten ja optisten ominaisuuksien takia ja sen ominaisuuksien muokattavuuden helppouden takia. Grafeeni voisi mahdollisesti korvata yleisesti k\u00e4yt\u00f6ss\u00e4 olleet jalot metallit kuten kullan ja hopean pintaplasmonien tuotossa ja tutkimuksessa ja voisi johtaa uudenlaiseen valon kontrollointiin nanoskaalassa ja optiikan ja elektroniikan yhdist\u00e4miseen t\u00e4ss\u00e4 pieness\u00e4 mittakaavassa.\r\n\r\nT\u00e4ss\u00e4 ty\u00f6ss\u00e4 tavoitteena oli \"hole-mask colloidal\"-litografiamenetelm\u00e4n muokkaaminen ja tarvittavien valmistusvaiheiden tutkiminen ja kehitys. Tavoitteena oli saada tehty\u00e4 n\u00e4ytteit\u00e4, joilla olisi 200 nm kokoisia grafeeninanokiekkoja sopivalla et\u00e4isyydell\u00e4 toisistaan ja jotka kattaisivat suurimman osan n\u00e4ytteen pinnasta. N\u00e4it\u00e4 grafeeninanokiekkoja tutkittaisiin sitten infrapunaspektroskopialla. Tavoitteena olisi saada n\u00e4kyviin pintaplasmoneista johtuvia resonansseja spektreiss\u00e4 sek\u00e4 n\u00e4iden voimakkuuden ja aallonpituuden muuttaminen s\u00e4hk\u00f6isell\u00e4 seostamisella eli t\u00e4ss\u00e4 tapauksessa tuomalla eri vahvuista hilaj\u00e4nnitett\u00e4 grafeenikiekoille.\r\n\r\nGrafeeninanokiekkojen valmistus onnistui kohtuullisen hyvin ja varsin luotettava valmistusmenetelm\u00e4 saatiin kehitetty\u00e4, vaikkakin jonkinlaista ep\u00e4puhtautta n\u00e4ytteisiin j\u00e4ikin todenn\u00e4k\u00f6isesti asetonipuhdistuksesta johtuen. Pintaplasmonimittaukset eiv\u00e4t sen sijaan onnistuneet lainkaan eik\u00e4 plasmoniresonansseja saatu n\u00e4kyviin miss\u00e4\u00e4n n\u00e4ytteiss\u00e4. T\u00e4lle voisi useitakin syit\u00e4 l\u00f6yty\u00e4, mutta mahdollisesti k\u00e4ytetty grafeeni ei ollut kovin hyv\u00e4\u00e4 n\u00e4it\u00e4 mittauksia ajatellen tai k\u00e4ytetty spektrometri ei ollut tarpeeksi hyv\u00e4 n\u00e4in ohuiden n\u00e4ytteiden mittaamiseen. Mittauksia olisi voitu my\u00f6s parantaa, jos n\u00e4ytteiden pinta-alasta suurempi osa olisi sis\u00e4lt\u00e4nyt grafeeninanokiekkoja.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Graphene has emerged as a promising candidate to replace noble metals as a plasmonic material due to its unique properties and tunability. Graphene plasmonics offer possibilities of controlling light in nanoscale devices and merging optics with electronics. The goal of this thesis was to modify a hole-mask colloidal lithography method to find out a fabrication method that could be used to manufacture samples of a randomly organized array of 200 nm sized graphene nanodisks with some distance between them and with a good amount of the sample covered by the nanodisks. 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spellingShingle Hakkola, Niko-Ville Manufacturing of graphene nanodisks for surface plasmon measurements plasmoniikka plasmonics graphene nanomaterials Fysiikka Physics 4021 nanomateriaalit nanorakenteet hiili grafeeni
title Manufacturing of graphene nanodisks for surface plasmon measurements
title_full Manufacturing of graphene nanodisks for surface plasmon measurements
title_fullStr Manufacturing of graphene nanodisks for surface plasmon measurements Manufacturing of graphene nanodisks for surface plasmon measurements
title_full_unstemmed Manufacturing of graphene nanodisks for surface plasmon measurements Manufacturing of graphene nanodisks for surface plasmon measurements
title_short Manufacturing of graphene nanodisks for surface plasmon measurements
title_sort manufacturing of graphene nanodisks for surface plasmon measurements
title_txtP Manufacturing of graphene nanodisks for surface plasmon measurements
topic plasmoniikka plasmonics graphene nanomaterials Fysiikka Physics 4021 nanomateriaalit nanorakenteet hiili grafeeni
topic_facet 4021 Fysiikka Physics grafeeni graphene hiili nanomateriaalit nanomaterials nanorakenteet plasmonics plasmoniikka
url https://jyx.jyu.fi/handle/123456789/56284 http://www.urn.fi/URN:NBN:fi:jyu-201712124651
work_keys_str_mv AT hakkolanikoville manufacturingofgraphenenanodisksforsurfaceplasmonmeasurements