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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 7
BKCSDE 32(7)
July 20, 2011

Title	Selective DNA Adsorption on Layered Double Hydroxide Nanoparticles
Author	Kyoung-Min Kim, Chung-Berm Park, Ae-Jin Choi, Jin-Ho Choy,, Jae-Min Oh
Keywords	Layered double hydroxide, Deoxyribonucleic acid, Adsorption, Separation
Abstract	We investigated the selective deoxyribonucleic acid (DNA) adsorption on layered double hydroxide (LDH) nanoparticles via studying the interaction between positively charged LDH nanoparticle as adsorbent and negatively charged adsorbates such as methyl orange (MO), fluorescein (FL), and DNA strands. The size controlled LDH (Mg0.78Al0.22(OH)2(CO3)0.11 · mH2O) was prepared by conventional coprecipitation method, followed by the hydrothermal treatment. According to the adsorption isotherms, the adsorbed amounts of MO and FL were similar, however, that of DNA were much larger. The adsorption behaviors were well fitted to Freundlich adsorption model. The concentration dependent adsorption behavior on LDH surface was described in order to verify the selective DNA separation ability. The result showed that the LDH has advantages in selective adsorption of DNA competing with single molecular anions.
Page	2217 - 2221
Full Text	PDF

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