Transformation of crystalline starch nanoparticles into highly luminescent carbon nanodots: Toxicity studies and their applications

Regina Sisika A Sonthanasamy, Wan Yaacob Wan Ahmad, Mohd Shazrul Fazry Sa`Ariwijaya, Nurul Izzaty Hassan, Mohamad Azwani Shah Mat Lazim

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Being abundant in many tropical part of the world, Dioscorea sp. as food is limited due to its toxicity. However polysaccharides derive from these tubers could be important for other applications. Here we developed a Highly Luminescent Carbon Nanodots (C-dots) via acid hydrolysis of Gadong starch (GS). The hydrolysis rate of GS increased from 49% to 86% within 7 days while the X-ray diffraction showed the native GS particle is a C-crystalline type. The GS particles were either round or oval with diameters ranging from 50-90 nm. Further acid dehydration and surface oxidation reduced the size of GS nanoparticles to 6-25 nm. The C-dots produced a fluorescent emission at wavelength 441 nm. Toxicity tests demonstrate that zebrafish embryo were able to tolerate the C-dots for 48 h after exposure. This study has successfully demonstrated a novel approach of converting GS into excellent fluorescent C-dot.

Original languageEnglish
Pages (from-to)488-496
Number of pages9
JournalCarbohydrate Polymers
Volume137
DOIs
Publication statusPublished - 10 Feb 2016

Fingerprint

Starch
Toxicity
Carbon
Nanoparticles
Crystalline materials
Hydrolysis
Acids
Polysaccharides
Dehydration
X ray diffraction
Wavelength
Oxidation

Keywords

  • Acid hydrolysis
  • Carbon dots
  • Dioscorea hispida
  • Nanocrystal
  • Starch

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

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abstract = "Being abundant in many tropical part of the world, Dioscorea sp. as food is limited due to its toxicity. However polysaccharides derive from these tubers could be important for other applications. Here we developed a Highly Luminescent Carbon Nanodots (C-dots) via acid hydrolysis of Gadong starch (GS). The hydrolysis rate of GS increased from 49{\%} to 86{\%} within 7 days while the X-ray diffraction showed the native GS particle is a C-crystalline type. The GS particles were either round or oval with diameters ranging from 50-90 nm. Further acid dehydration and surface oxidation reduced the size of GS nanoparticles to 6-25 nm. The C-dots produced a fluorescent emission at wavelength 441 nm. Toxicity tests demonstrate that zebrafish embryo were able to tolerate the C-dots for 48 h after exposure. This study has successfully demonstrated a novel approach of converting GS into excellent fluorescent C-dot.",
keywords = "Acid hydrolysis, Carbon dots, Dioscorea hispida, Nanocrystal, Starch",
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T2 - Toxicity studies and their applications

AU - Sonthanasamy, Regina Sisika A

AU - Wan Ahmad, Wan Yaacob

AU - Sa`Ariwijaya, Mohd Shazrul Fazry

AU - Hassan, Nurul Izzaty

AU - Mat Lazim, Mohamad Azwani Shah

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N2 - Being abundant in many tropical part of the world, Dioscorea sp. as food is limited due to its toxicity. However polysaccharides derive from these tubers could be important for other applications. Here we developed a Highly Luminescent Carbon Nanodots (C-dots) via acid hydrolysis of Gadong starch (GS). The hydrolysis rate of GS increased from 49% to 86% within 7 days while the X-ray diffraction showed the native GS particle is a C-crystalline type. The GS particles were either round or oval with diameters ranging from 50-90 nm. Further acid dehydration and surface oxidation reduced the size of GS nanoparticles to 6-25 nm. The C-dots produced a fluorescent emission at wavelength 441 nm. Toxicity tests demonstrate that zebrafish embryo were able to tolerate the C-dots for 48 h after exposure. This study has successfully demonstrated a novel approach of converting GS into excellent fluorescent C-dot.

AB - Being abundant in many tropical part of the world, Dioscorea sp. as food is limited due to its toxicity. However polysaccharides derive from these tubers could be important for other applications. Here we developed a Highly Luminescent Carbon Nanodots (C-dots) via acid hydrolysis of Gadong starch (GS). The hydrolysis rate of GS increased from 49% to 86% within 7 days while the X-ray diffraction showed the native GS particle is a C-crystalline type. The GS particles were either round or oval with diameters ranging from 50-90 nm. Further acid dehydration and surface oxidation reduced the size of GS nanoparticles to 6-25 nm. The C-dots produced a fluorescent emission at wavelength 441 nm. Toxicity tests demonstrate that zebrafish embryo were able to tolerate the C-dots for 48 h after exposure. This study has successfully demonstrated a novel approach of converting GS into excellent fluorescent C-dot.

KW - Acid hydrolysis

KW - Carbon dots

KW - Dioscorea hispida

KW - Nanocrystal

KW - Starch

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