Label-free fluorescent detection of copper(II) using DNA-templated highly luminescent silver nanoclusters.

نویسندگان

  • Min Zhang
  • Bang-Ce Ye
چکیده

Novel luminescent silver nanoclusters (AgNCs) were synthesized utilizing DNA as templates by a simple, rapid and one-pot procedure. Luminescence studies indicated that these DNA-AgNCs exhibited strong emission with peak maximum at 624 nm. The fluorescence of the DNA-AgNCs was found to be quenched by Cu(2+) enabling its detection with high sensitivity and selectivity.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

One-pot synthesized DNA-templated Ag/Pt bimetallic nanoclusters as peroxidase mimics for colorimetric detection of thrombin.

We developed a facile one-step approach to synthesize DNA-templated Ag/Pt bimetallic nanoclusters (DNA-Ag/Pt NCs), which possess highly-efficient peroxidase-like catalytic activity. With this finding, an aptamer based sandwich-type strategy is employed to design a label-free colorimetric aptasensor for the protein detection with high sensitivity and selectivity.

متن کامل

Silver nanoclusters as fluorescent probes for selective and sensitive detection of copper ions.

Fluorescent DNA-Ag NCs are demonstrated as novel, label-free, and turn-on fluorescence probes for Cu(2+) ions sensors. We also used this novel fluorescent probe to determine Cu(2+) ions in Montana soil (SRM 2710) and pond water.

متن کامل

Target-controlled formation of silver nanoclusters in abasic site-incorporated duplex DNA for label-free fluorescence detection of theophylline.

A novel, label-free, fluorescence based sensor for theophylline has been developed. In the new sensor system, an abasic site-incorporated duplex DNA probe serves as both a pocket for recognition of theophylline and a template for the preparation of fluorescent silver nanoclusters. The strategy relies on theophylline-controlled formation of fluorescent silver nanoclusters from abasic site-incorp...

متن کامل

An anti-galvanic replacement reaction of DNA templated silver nanoclusters monitored by the light-scattering technique.

An anti-galvanic replacement reaction (AGRR) of copper(II) ions reduced by ultra-small ssDNA-templated silver nanoclusters forming Ag-Cu alloy nanoparticles was observed. The reaction is against the classic galvanic theory and was monitored sensitively by the light-scattering technique.

متن کامل

Fluorescent detection of hydrogen peroxide and glucose with polyethyleneimine-templated Cu nanoclusters.

An interesting, simple, and label-free strategy for the detection of hydrogen peroxide and glucose has been developed with polyethyleneimine (PEI)-capped copper nanoclusters as a fluorescence probe in aqueous solution. The PEI-templated Cu nanoclusters which we have synthesized have an average diameter of 1.8 nm and show a blue emission at 480 nm. In the presence of hydrogen peroxide, the fluor...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The Analyst

دوره 136 24  شماره 

صفحات  -

تاریخ انتشار 2011