Single-particle fluorescence intensity fluctuations of carbon nanodots

Somes K. Das; Yiyang Liu; Sinhea Yeom; Doo Young Kim; Christopher I. Richards

doi:10.1021/nl403820m

Single-particle fluorescence intensity fluctuations of carbon nanodots

Somes K. Das, Yiyang Liu, Sinhea Yeom, Doo Young Kim, Christopher I. Richards

Chemistry

Research output: Contribution to journal › Article › peer-review

180 Scopus citations

Abstract

Fluorescent carbon nanodots (CNDs) were synthesized in oxidized and reduced forms and were analyzed at the single-particle level. Images of single CNDs at different excitation energies revealed significant heterogeneity in the lower energy trap sites between particles. We observed that a high percentage of reduced CND particles transitioned between multiple fluorescence intensity levels indicative of multichromophoric systems. Despite this behavior, individual CNDs exhibit single-step photobleaching and transient blinking to the background level suggesting single-molecule behavior.

Original language	English
Pages (from-to)	620-625
Number of pages	6
Journal	Nano Letters
Volume	14
Issue number	2
DOIs	https://doi.org/10.1021/nl403820m
State	Published - Feb 12 2014

Keywords

Carbon nanodot
fluorescence jumps and quenched states
nanostructure
single particle fluorescence

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl403820m

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title = "Single-particle fluorescence intensity fluctuations of carbon nanodots",

abstract = "Fluorescent carbon nanodots (CNDs) were synthesized in oxidized and reduced forms and were analyzed at the single-particle level. Images of single CNDs at different excitation energies revealed significant heterogeneity in the lower energy trap sites between particles. We observed that a high percentage of reduced CND particles transitioned between multiple fluorescence intensity levels indicative of multichromophoric systems. Despite this behavior, individual CNDs exhibit single-step photobleaching and transient blinking to the background level suggesting single-molecule behavior.",

keywords = "Carbon nanodot, fluorescence jumps and quenched states, nanostructure, single particle fluorescence",

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doi = "10.1021/nl403820m",

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AU - Das, Somes K.

AU - Liu, Yiyang

AU - Yeom, Sinhea

AU - Kim, Doo Young

AU - Richards, Christopher I.

PY - 2014/2/12

Y1 - 2014/2/12

N2 - Fluorescent carbon nanodots (CNDs) were synthesized in oxidized and reduced forms and were analyzed at the single-particle level. Images of single CNDs at different excitation energies revealed significant heterogeneity in the lower energy trap sites between particles. We observed that a high percentage of reduced CND particles transitioned between multiple fluorescence intensity levels indicative of multichromophoric systems. Despite this behavior, individual CNDs exhibit single-step photobleaching and transient blinking to the background level suggesting single-molecule behavior.

AB - Fluorescent carbon nanodots (CNDs) were synthesized in oxidized and reduced forms and were analyzed at the single-particle level. Images of single CNDs at different excitation energies revealed significant heterogeneity in the lower energy trap sites between particles. We observed that a high percentage of reduced CND particles transitioned between multiple fluorescence intensity levels indicative of multichromophoric systems. Despite this behavior, individual CNDs exhibit single-step photobleaching and transient blinking to the background level suggesting single-molecule behavior.

KW - Carbon nanodot

KW - fluorescence jumps and quenched states

KW - nanostructure

KW - single particle fluorescence

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VL - 14

SP - 620

EP - 625

JO - Nano Letters

JF - Nano Letters

IS - 2

ER -

Single-particle fluorescence intensity fluctuations of carbon nanodots

Abstract

Keywords

ASJC Scopus subject areas

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