Induced chirality in single walled carbon nanotube based self-assembly

Abstract

Chirality is an important determinant of the optical and electronic properties of single walled carbon nanotubes (SWNTs). Pristine zigzag SWNTs have been functionalized with lipids by a solid state functionalization process. Neither the lipids nor the SWNTs show a circular dichroism (CD) signal prior to functionalization. Upon functionalization, a change in the joint density of electronic states occurs which is reflected by a three-peak G 0 band profile and the emergence of a CD signal. A molecular mechanism for the emergent CD signal associated with this lipid-specific self-assembly is described.

Chirality sensitive binding of tryptophan enantiomers with pristine single wall carbon nanotubes

“…14 SWNTs can be semiconductor or metallic in nature. Our previous Raman study confirmed the semiconducting nature [15][16][17][18] of our synthesized SWNTs. As SWNTs are semiconducting in nature, therefore SWNTs may be either chiral or zigzag because armchair SWNTs are metallic in nature.…”

Nanotechnology based activation-immobilization of psychrophilic pectate lyase: A novel approach towards enzyme stabilization and enhanced activity

“…Due to such re-structuring, a pseudo-micellar structure of the lipid-SWNT complex i.e. nanorope formation [8,18] takes place which is readily soluble in water. The self-assembly collapses upon mild sonication and when it is allowed to re-assemble again in presence of…”

“…The SWNT: PL The reuse of SWNT assembly [8,18] as described earlier was used for packing of fresh enzymes or the same enzymes for a number of cycles. Whether other NPs can influence the enzyme activity, NP-PL was packed inside the SWNT cage and SWNT-PL activity was assayed.…”

“…The basic principle of solid state functionalization at nanoscale had first been explored by Bhattacharyya et al [7]. The theoretical insight of lipid functionalized SWNT self-assembly [18] (nanorope design) which serve as a molecular machine has been reported previously by Bhattacharyya et al [8,18] for developing a reusable glucose sensor. This principle has been utilized for developing and studying the thermal stability and re-usability of a cold-tolerant pectate lyase.…”

Real‐time electro‐diffusion method to discriminate carbon nanomaterials

“…Our synthesized SWNTs are semiconductor , MWNTs are metallic and graphenes are actually a homogenous mixture of having semiconducting and metallic properties in nature depending on its synthesis process. During the synthesis the materials has been properly annealed to make it defect free from oxygen impurities and functionalized with SDS.…”