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Title: Synthesis of zinc-gallate phosphors by biomineralization and their emission properties

Journal Article · · Acta Biomaterialia
ORCiD logo [1];  [2];  [2]; ORCiD logo [3];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); United States Geological Survey, Reston, VA (United States)
  2. Pukyong National Univ., Pusan (Republic of Korea)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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Reduction of target species by microorganisms and their subsequent precipitation into sparingly soluble mineral phase nanoparticles have been referred to as microbially mediated nanomaterial synthesis. Here, we describe the microbially mediated production of nano-dimensioned spinel structured zinc-gallate (ZnGa2O4) phosphors exhibiting different emission performance with varying substituted elements. Interestingly, in the microbially mediated phosphor production described herein, there were no reducible metal- and non-metal species composing the target minerals. By varying substituted elements, zinc-gallate phosphors present typical red, green, and blue (RGB) emission. An apparent whitish emission was accomplished by blending phosphors. A promising potential for white light produced by biosynthesized mixtures of Cr-, Mn-, and Co- substituted zinc-gallates representing RGB emissions was evidenced. Microbial activity supplied a reducing driving force and provided appropriate near neutral pH and reduced Eh conditions to thermodynamically precipitate spinel structured nanomaterials from supersaturated divalent and trivalent cations. Furthermore, this result complemented conventional biomineralization concepts and expanded the realm of biomanufacturing nanomaterials for further applications.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1571854
Alternate ID(s):
OSTI ID: 1703035
Journal Information:
Acta Biomaterialia, Vol. 97, Issue C; ISSN 1742-7061
Publisher:
Acta Materialia, Inc.Copyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (9)

Table 1(p. 6)table Table 1
Fig. 1(p. 9)figure Fig. 1
Fig. 2(p. 11)figure Fig. 2
Fig. 3(p. 12)figure Fig. 3
Fig. 4(p. 15)figure Fig. 4
Fig. 5(p. 17)figure Fig. 5
Fig. S1(p. 22)figure Fig. S1
Fig. S2(p. 23)figure Fig. S2
Fig. S3(p. 24)figure Fig. S3

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59 BASIC BIOLOGICAL SCIENCES
Biomineralization
Zinc-gallate
Phosphor