Colorimetric Analysis on Flocculation of Bioinspired Au Self-Assembly for Biophotonic Application

AbstractHighly ordered gold NC/silica films are synthesized by self-assembly of water-soluble gold nanocrystal micelles and soluble silica using a sol-gel spin-coating technique. The optical properties are analyzed using ellipsometry and ultraviolet-visible spectroscopy. The absorption spectra show a strong surface plasmon absorption band at ∼520 nm for all samples. Angular excitation spectra of the surface plasmon show a steep dip in the reflectivity curve at ∼65°. Charge transport behavior of the films is examined using metal-oxide-semiconductor (MOS) structures.MOS capacitor samples exhibit charge storage with discharge behavior dominated by electron transport within the gold NC arrays.

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Properties of Nanomaterials and Environment

Nanotechnology Applications in Environmental Engineering - Advances in Environmental Engineering and Green Technologies ◽

10.4018/978-1-5225-5745-6.ch002 ◽

2019 ◽

pp. 28-43

Author(s):

Phool Shahzadi

Keyword(s):

Optical Properties ◽

Metal Oxides ◽

Surface Plasmon ◽

Field Enhancement ◽

Visible Absorption ◽

Plasmon Absorption ◽

Sensor Applications ◽

Timely Review ◽

Strong Surface ◽

Metal Nanomaterials

The chapter provides a timely review of the various properties of nonmaterial and their applications into environmental compartments. An extensive variety of poisonous chemicals is discharged into the environment because of globalization and industrialization. The dimensional, compositional, geometric, and structural properties are fundamental to convey usefulness of the nanomaterials. The controlled sizes and shapes of nanoparticles are anticipated to yield unique catalytic, electrochemical, and photochemical properties. The electrochemical properties of monolayer-functional metal nanoparticles are expected to be controlled by the particle sizes. Metal nanomaterials have interesting optical properties due to strong surface plasmon absorption and field enhancement effects; metal oxides lack visible absorption due to very large bandgap. Nanocomposites have complex optical properties. Nanomaterials present gigantic advantages on diverse applications, catalysis, imaging, biotechnological, and sensor applications due to their improved properties.

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Properties of Nanomaterials and Environment

Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials ◽

10.4018/978-1-7998-8591-7.ch004 ◽

2021 ◽

pp. 89-104

Author(s):

Phool Shahzadi

Keyword(s):

Optical Properties ◽

Metal Oxides ◽

Surface Plasmon ◽

Field Enhancement ◽

Visible Absorption ◽

Plasmon Absorption ◽

Sensor Applications ◽

Timely Review ◽

Strong Surface ◽

Metal Nanomaterials

The chapter provides a timely review of the various properties of nonmaterial and their applications into environmental compartments. An extensive variety of poisonous chemicals is discharged into the environment because of globalization and industrialization. The dimensional, compositional, geometric, and structural properties are fundamental to convey usefulness of the nanomaterials. The controlled sizes and shapes of nanoparticles are anticipated to yield unique catalytic, electrochemical, and photochemical properties. The electrochemical properties of monolayer-functional metal nanoparticles are expected to be controlled by the particle sizes. Metal nanomaterials have interesting optical properties due to strong surface plasmon absorption and field enhancement effects; metal oxides lack visible absorption due to very large bandgap. Nanocomposites have complex optical properties. Nanomaterials present gigantic advantages on diverse applications, catalysis, imaging, biotechnological, and sensor applications due to their improved properties.

Download Full-text