astronomy

Philippe Guyot-Sionnest

Philippe Guyot-Sionnest is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Philippe Guyot-Sionnest rather than just read about it. In short: Philippe Guyot-Sionnest (born 1961, Nancy, France) is a professor at the University of Chicago appointed jointly in the departments of physics and chemistry. He works in the field of colloidal semiconductors and metal nanocrystals.

Key takeaways

Philippe Guyot-Sionnest belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Philippe Guyot-Sionnest to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Philippe Guyot-Sionnest from memory before moving on to harder problems.

Reference excerpt

Philippe Guyot-Sionnest (born 1961, Nancy, France) is a professor at the University of Chicago appointed jointly in the departments of physics and chemistry. He works in the field of colloidal semiconductors and metal nanocrystals. He gained a Diplome d'Etude Approfondie in Orsay, France, in 1984 and a PhD at the University of California, Berkeley in 1987. He worked as a Research Scientist at the University of Paris-Sud in Orsay, France from 1988 to 1991, moving to the US in 1991 as Professor in both the Department of Chemistry and the Department of Physics at the University of Chicago, a position he has held since. His research interest is in the behaviour of nanocrystals of semiconductor materials.

Awards 2001 Fellow of the American Physical Society 1992 David and Lucile Packard Foundation Fellow. 1990 Prix National des Lasers, Société Française de Physique

Selected publications Pandey, A.; Guyot-Sionnest, P. (2008-11-07). "Slow Electron Cooling in Colloidal Quantum Dots". Science. 322 (5903). American Association for the Advancement of Science (AAAS): 929–932. Bibcode:2008Sci...322..929P. doi:10.1126/science.1159832. ISSN 0036-8075. PMID 18988849. S2CID 10239476. Ithurria, Sandrine; Guyot-Sionnest, Philippe; Mahler, Benoit; Dubertret, Benoit (2007-12-27). "Mn2+ as a Radial Pressure Gauge in Colloidal Core/Shell Nanocrystals". Physical Review Letters. 99 (26) 265501. American Physical Society (APS). Bibcode:2007PhRvL..99z5501I. doi:10.1103/physrevlett.99.265501. ISSN 0031-9007. PMID 18233588. Yu, Dong; Wang, Congjun; Wehrenberg, Brian L.; Guyot-Sionnest, Philippe (2004-05-25). "Variable Range Hopping Conduction in Semiconductor Nanocrystal Solids". Physical Review Letters. 92 (21) 216802. American Physical Society (APS). arXiv:cond-mat/0403597. Bibcode:2004PhRvL..92u6802Y. doi:10.1103/physrevlett.92.216802. ISSN 0031-9007. PMID 15245304. S2CID 10565090. Yu, D. (2003-05-23). "n-Type Conducting CdSe Nanocrystal Solids". Science. 300 (5623). American Association for the Advancement of Science (AAAS): 1277–1280. Bibcode:2003Sci...300.1277Y. doi:10.1126/science.1084424. ISSN 0036-8075. PMID 12764194. S2CID 33819795. Wang, C.; Shim, Moonsub; Guyot-Sionnest, Philippe (2001-03-23). "Electrochromic Nanocrystal Quantum Dots". Science. 291 (5512). American Association for the Advancement of Science (AAAS): 2390–2392. Bibcode:2001Sci...291.2390W. doi:10.1126/science.291.5512.2390. ISSN 0036-8075. PMID 11264530. Shim, Moonsub; Guyot-Sionnest, Philippe (2000). "n-type colloidal semiconductor nanocrystals". Nature. 407 (6807). Springer Science and Business Media LLC: 981–983. Bibcode:2000Natur.407..981S. doi:10.1038/35039577. ISSN 0028-0836. PMID 11069172. S2CID 4334585.

References

Worked examples

Example 1 — a first encounter with Philippe Guyot-Sionnest

Start with the simplest possible case. Write down what Philippe Guyot-Sionnest claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Philippe Guyot-Sionnest before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Philippe Guyot-Sionnest ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Philippe Guyot-Sionnest

In research: Philippe Guyot-Sionnest appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Philippe Guyot-Sionnest in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Philippe Guyot-Sionnest is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1961 births, Fellows of the American Physical Society, French emigrants to the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Philippe Guyot-Sionnest outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Philippe Guyot-Sionnest in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Philippe Guyot-Sionnest means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Philippe Guyot-Sionnest out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Philippe Guyot-Sionnest in simple terms?

Why does Philippe Guyot-Sionnest matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Philippe Guyot-Sionnest?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Philippe Guyot-Sionnest.