Ho-Kwang Mao

Source: Wikipedia, the free encyclopedia.
Ho-Kwang Mao
Born (1941-06-18) June 18, 1941 (age 82)
Shanghai, China
Alma mater1963 B.S. National Taiwan University

1966 M.S. University of Rochester

1968 Ph.D University of Rochester
Known forHigh Pressure techniques, X-ray sciences
SpouseAgnes Mao
AwardsInge Lehmann Medal (2007)

Balzan Prize (2005)
Gregori Aminoff Prize (2005)
Roebling Medal (2005)
Arthur L. Day Prize (1990)
P. W. Bridgman Award (1989)

Mineralogical Society of America Award (1979)
Scientific career
FieldsGeology, Material Sciences
Institutions
Carnegie Institution of Washington
Doctoral advisorBill Bassett and Taro Takahashi [1]
Websitehttps://sites.google.com/carnegiescience.edu/ho-kwangmao/cv

Ho-Kwang (Dave) Mao (Chinese: 毛河光; pinyin: Máo Héguāng; Wade–Giles: Mao Ho-kuang; born June 18, 1941) is a Chinese-American geologist. He is the director of the Center for High Pressure Science and Technology Advanced Research in Shanghai, China.[2] He was a staff scientist at Geophysical Laboratory of the Carnegie Institution for Science[3] for more than 30 years. Mao is a recognized leading scientist in high pressure geosciences and physical science. There are two minerals named after him, Davemaoite and Maohokite.

Biography

Mao was born in

fleeing with the rest of the government of the Republic of China to the province.[4][5] Mao received his BS from National Taiwan University in 1963. Mao further pursued his studies in the United States, and obtained MS in 1966 and PhD in 1968 from the University of Rochester
, New York.

From 1968 to 1972, Mao did his postdoctoral research at the Geophysical Laboratory of the Carnegie Institution of Washington (CIW). From then on Mao has spent his career at Geophysical Laboratory as a Senior Staff scientist.

In 2013, Mao founded Center for High Pressure Science and Technology Advanced Research in his birthplace, Shanghai.[2][6] He takes the director role at the center and leads a group of international scientists to tackle world-class scientific challenges.[6] The center has a Nature index of 17.68 in 2021 and was on an increasing trend since 2016.[7]

Mao has three daughters - Cyndy, Linda, and Wendy. His youngest daughter, Wendy Mao, is a professor of geological sciences at Stanford University.[8]

Research

Achieving high pressure and pressure calibration methods

Mao is one of the most prolific users of the diamond anvil cell for research at high pressures. Although at the time the claim was controversial,[9] his work with Peter M. Bell is now generally accepted as being the first verified static pressure in excess of 1 Megabar.[10][11]

Mao and colleagues first calibrated ruby fluorescence pressure scale to 80 GPa and this method has been widely used in almost every diamond anvil cell experiments.[12] This work has been cited by 3921 times as of Jan 15, 2022, according to google scholar.

In 2018, 400 GPa was achieved by his team and a detailed description of pressure loading and distribution, gasket thickness variation, and diamond anvil deformation was reported.[13][14]

Towards metallic hydrogen

Mao is a pioneer in experimentally exploring the possible metallic hydrogen phase under high pressure. His work on solid hydrogen starts in 1988, where he reported single-crystal structure of hydrogen up to 26.5 GPa.[15] He later published a review paper on transitions in solid hydrogen in 1994.[16] In 1996, his team's work[17] suggested a more compressible solid hydrogen than previously thought. More recently in 2019, his team published results on single crystal diffraction of the lightest material in the world, hydrogen, up to 254 GPa and revealed isostructural electronic transitions in solid hydrogen at around 220 GPa.[18]

Superconductivity

In 1987, Mao and a colleague at the Geophysical Laboratory,

critical temperature above the boiling point of liquid nitrogen.[19]

Iron peroxide in Earth's interior

Mao discovered formation of FeO2Hx from goethite FeOOH[20] or from iron-water reaction[21] under Earth's lower mantle conditions. The novel FeO2Hx phase processes a pyrite structure. Since this phase can contain varied amount of hydrogen,[22] it would have important implications for the deep water cycle.[23][24]

Honors and awards

References

  1. ^ "Ho-Kwang Mao |". honors.agu.org. Retrieved 2022-01-14.
  2. ^
    S2CID 44666542
    .
  3. ^
    S2CID 244039394
    .
  4. ISBN 9789862214282
    .
  5. ^ "军统特务毛森简历 毛森的后代". ishare.ifeng.com (in Chinese). Retrieved 2022-01-14.
  6. ^
    S2CID 84186042
    .
  7. ^ "Center for High Pressure Science and Technology Advanced Research (HPSTAR)". Nature Index. Retrieved 2022-01-14.
  8. ^ "Ho-Kwang Mao |". honors.agu.org. Retrieved 2022-01-14.
  9. S2CID 15204168
    .
  10. ISBN 0521654742
    .
  11. S2CID 12416002
    .
  12. ISSN 0148-0227
    .
  13. PMID 29432145
    .
  14. ^ "How a diamond anvil cell works up to 4 Mbar". Geophysical Laboratory. 2018-02-13. Retrieved 2022-01-15.
  15. S2CID 28007172
    .
  16. ISSN 0034-6861
    .
  17. S2CID 4372789
    .
  18. S2CID 202762596
    .
  19. ISBN 978-0-429-06586-6
    .
  20. S2CID 10702618
    .
  21. S2CID 4463870
    .
  22. PMID 28143928
    .
  23. ISSN 2095-5138
    .
  24. ISBN 978-0-309-04536-0
    .
  25. ^ a b "Ho-kwang Mao". www.nasonline.org. Retrieved 2022-01-14.
  26. ^ Shao, Danlei (25 Dec 2020). "World-Renowned Scientist Ho-Kwang Mao joins Zhejiang University as Honorary Professor". Retrieved 14 Jan 2022.
  27. doi:10.2138/am.2006.459
    .
  28. doi:10.2138/am.2006.460
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Ho-Kwang_Mao&oldid=1185718801"