Akademik Veri Yönetim Sistemi
Nanotoxicology and Nanoecotoxicology Vol. 1, Vineet Kumar,Praveen Guleria Shivendu Ranjan,Nandita Dasgupta,Eric Lichtfouse, Editör, Springer, London/Berlin , Zürich, ss.21-55, 2021
In this chapter, nanomaterials are reviewed according to their
physicochemical properties. The reasons for these properties and in turn
their behaviors are underlined. Most properties of nanomaterials, such
as physical, chemical, electrical, optical, and structural, are strongly
size dependent. It has been observed that metallic particles tend to
behave like semiconductors, as their dimension decreases. Carbon
nanotubes can be engineered to be lighter and stronger than steel. 1D
ZnS nanobelts are shown to absorb both UV (320 nm) and visible light
(600 nm). Then, how the attributes of nanomaterials can be appropriate
for a specific application is discussed. A wide range of nanomaterials
and their applications including biosensor, drug carrier, bandage, etc.
are concisely addressed. Thereafter, the black side of the
nanotechnology, concern related to human health and environment, is
elucidated and some experimental studies related to toxicity are
compared. It has been shown that their toxicity mechanisms are quiet
complex. It has been claimed that generally increase in concentration
and decrease in dimensions result in higher toxicity and higher cellular
uptake. Copper nanoparticles are shown to be more lethal with respect
to bulk copper. The toxicity of nanomaterials can be alleviated by
coating with suitable materials. Coatig CdSe quantum dots with ZnS
enhances cell viability by 66%. And finally, the risk assessment and
precautions to be taken are given. Some of risk assessment methods are
introduced. Due to lack of knowledge, conflicts between results and
uncertainty, it is too early to draw a complete picture of nanomaterials
in terms of risk assessment.