astronomy

Hyeon Taeghwan

Hyeon Taeghwan 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 Hyeon Taeghwan rather than just read about it. In short: Taeghwan Hyeon (Korean: 현택환; born in 1964) is a South Korean chemist. He is SNU distinguished professor in the School of Chemical and Biological Engineering at Seoul National University, director of Center for Nanoparticle Research of Institute for Basic Science (IBS), and an associate editor of the Journal of the American Chemical Society.

Key takeaways

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

Reference excerpt

Taeghwan Hyeon (Korean: 현택환; born in 1964) is a South Korean chemist. He is SNU distinguished professor in the School of Chemical and Biological Engineering at Seoul National University, director of Center for Nanoparticle Research of Institute for Basic Science (IBS), and an associate editor of the Journal of the American Chemical Society. Hyeon is recognized by his pioneering work in chemical synthesis of uniformly sized nanocrystals and various applications of functional nanomaterials. In 2011, he was listed as the 37th most cited chemist and the 19th in materials science among "Top 100 Chemists" of the decade by UNESCO&IUPAC. He has published over 350 papers in prominent international journals with more than 70,000 citations and an h-index of 137. Since 2014, he has been listed as a Highly Cited Researcher in chemistry and materials science by Clarivate Analytics and became a Clarivate Citation Laureate in 2020.

Biography Hyeon was born in Dalseong County, Daegu, South Korea. He received his B.A. degree in 1987 and M.S. in 1989 from Chemistry Department of Seoul National University, and Ph.D. in inorganic chemistry from University of Illinois at Urbana-Champaign in 1996 under the supervision of Kenneth S. Suslick. At Illinois Hyeon studied sonochemical synthesis of nanostructured catalytic and magnetic materials. From June 1996 to July 1997, he was a postdoctoral research associate in the Wolfgang M. H. Sachtler group at Northwestern University. He joined the faculty of the School of Chemical and Biological Engineering at Seoul National University in 1997.

Career Hyeon is a leading scientist in the area of synthesis, assembly, and biomedical applications of uniformly sized nanoparticles. In particular, his research group developed a new generalized synthetic strategy, called "heat-up process", for producing uniform-sized nanoparticles of many transition metals and oxides without a size selection process. With this simple and inexpensive method, his group went on to design and fabricate multifunctional nanostructured materials for biomedical applications. Hyeon developed a new T1 MRI contrast agent using biocompatible manganese oxide (MnO) nanoparticles, exhibiting detailed anatomic structures of mouse brain. His group reported on the fabrication of monodisperse magnetite nanoparticles immobilized with uniform pore-sized mesoporous silica spheres for simultaneous MRI, fluorescence imaging, and drug delivery. The first demonstration of high-resolution in vivo three-photon imaging using biocompatible and bright Mn2+ doped ZnS nanocrystals was published in 2013. Uniformly sized iron oxide nanoclusters could be successfully used as T1 MR contrast agent for high-resolution MR angiography of macaque monkeys. His research interests also includes engineering the architecture of nanomaterials and utilizing them in lithium-ion batteries, fuel cell electrocatalysts, solar cells, and thermoelectrics. The group reported in 2013 the first demonstration of galvanic replacement reactions in metal oxide nanocrystals, and were able to synthesize hollow nanocrystals of various multimetallic oxides including Mn3O4/γ-Fe2O3. (Ref) He has delivered more than 30 invited lectures in conferences sponsored by the Materials Research Society, American Chemical Society, and Gordon Research Conferences, and more than 20 invited lectures at UC-Berkeley, Stanford, Harvard, MIT, Cornell, and Columbia.

Honors and awards 2025: Madhuri and Jagdish N. Sheth International Alumni Award for Exceptional Achievement, University of Illinois Urbana-Champaign 2024: International Member, National Academy of Engineering 2023: International Fellow of Royal Swedish Academy of Engineering Sciences 2022: NAEK Award, National Academy of Engineering of Korea 2020: Korea's Top 5 Bio-Field Research Results and News 2020: Clarivate Citation Laureate 2017: SNU Distinguished Professor 2016: Top Scientist and Technologist Award of Korea, Korean Federation of Science and Technology Societies 2016: IUVSTA Prize for Technology (International Union for Vacuum Science, Technique and Applications) 2014–: Highly Cited Researcher, Clarivate Analytics, chemistry (2014–2019), materials science (2014–2019) 2013: Fellow of Materials Research Society 2012: Member of National Academy of Engineering of Korea 2012: Ho-Am Prize in Engineering, Samsung Hoam Foundation 2011: 100 Leaders in Korea, The Dong-A Ilbo 2000–2010: "Top 100 Chemists" of the decade, Thomson Reuters (2011) 2010: Member of Korean Academy of Science and Technology 2010: SNU Distinguished Fellow 2008: POSCO TJ Park Prize, POSCO TJ Park Foundation 2007: Shinyang Science Award, Shinyang Foundation 2006: Fellow of Royal Society of Chemistry, UK 2005: Excellent Researcher Award, Division of Inorganic Chemistry of the Korean Chemical Society 2005: The 4th DuPont Science and Technology Award, DuPont Korea 2002: Scientist of the Month, Ministry of Science and Technology, Korea 2002: 5th Korean Young Scientist Award, Awarded to one researcher in a given field per every other year by the President of South Korea 2001: Korean Chemical Society-Wiley Young Chemist Award, Korean Chemical Society 2001: Young Scientist Award, Korean Academy of Science and Technology 1996: T. S. Piper Award, University of Illinois at Urbana-Champaign, Inorganic Chemistry 1993–1996: University of Illinois Chemistry Department Fellowship 1991–1996: Korean Government Overseas Fellowship

References

External links Hyeon Research Group Google Scholar User Profile A Master of Nanoscience Moves Closer to the Top

Illustrations

Worked examples

Example 1 — a first encounter with Hyeon Taeghwan

Start with the simplest possible case. Write down what Hyeon Taeghwan 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 Hyeon Taeghwan 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 Hyeon Taeghwan 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 Hyeon Taeghwan

In research: Hyeon Taeghwan 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 Hyeon Taeghwan 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: Hyeon Taeghwan is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1964 births, Academic staff of Seoul National University, Institute for Basic Science, so understanding it makes those chapters shorter.
In everyday life: Look for Hyeon Taeghwan 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 Hyeon Taeghwan in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hyeon Taeghwan 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 Hyeon Taeghwan out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hyeon Taeghwan in simple terms?

Why does Hyeon Taeghwan 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 Hyeon Taeghwan?

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 Hyeon Taeghwan.