Real-time detection of mercury ions in water using a reduced graphene oxide/DNA field-effect transistor with assistance of a passivation layer

Chang, Jingbo; Zhou, Guihua; Gao, Xianfeng; Mao, Shun; Cui, Shumao; Ocola, Leonidas E.; Yuan, Chris; Chen, Junhong

doi:10.1016/j.sbsr.2015.07.009

Title: Real-time detection of mercury ions in water using a reduced graphene oxide/DNA field-effect transistor with assistance of a passivation layer

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Abstract

Field-effect transistor (FET) sensors based on reduced graphene oxide (rGO) for detecting chemical species provide a number of distinct advantages, such as ultrasensitivity, label-free, and real-time response. However, without a passivation layer, channel materials directly exposed to an ionic solution could generate multiple signals from ionic conduction through the solution droplet, doping effect, and gating effect. Therefore, a method that provides a passivation layer on the surface of rGO without degrading device performance will significantly improve device sensitivity, in which the conductivity changes solely with the gating effect. In this work, we report rGO FET sensor devices with Hg²⁺-dependent DNA as a probe and the use of an Al₂O₃ layer to separate analytes from conducting channel materials. The device shows good electronic stability, excellent lower detection limit (1 nM), and high sensitivity for real-time detection of Hg²⁺ in an underwater environment. Our work shows that optimization of an rGO FET structure can provide significant performance enhancement and profound fundamental understanding for the sensor mechanism.

Authors:

Chang, Jingbo; Zhou, Guihua; Gao, Xianfeng; Mao, Shun; Cui, Shumao; Ocola, Leonidas E.; Yuan, Chris;

Publication Date:: Tue Sep 01 00:00:00 EDT 2015

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1209988

Alternate Identifier(s):: OSTI ID: 1208662

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Published Article

Journal Name:: Sensing and Bio-Sensing Research

Additional Journal Information:: Journal Name: Sensing and Bio-Sensing Research Journal Volume: 5 Journal Issue: C; Journal ID: ISSN 2214-1804

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; field-effect transistor, graphene oxide, Au nanoparticle, passivation layer

Citation Formats


                    Chang, Jingbo, Zhou, Guihua, Gao, Xianfeng, Mao, Shun, Cui, Shumao, Ocola, Leonidas E., Yuan, Chris, and Chen, Junhong. Real-time detection of mercury ions in water using a reduced graphene oxide/DNA field-effect transistor with assistance of a passivation layer.  Netherlands: N. p., 2015. 
Web.  doi:10.1016/j.sbsr.2015.07.009.

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                    Chang, Jingbo, Zhou, Guihua, Gao, Xianfeng, Mao, Shun, Cui, Shumao, Ocola, Leonidas E., Yuan, Chris, & Chen, Junhong. Real-time detection of mercury ions in water using a reduced graphene oxide/DNA field-effect transistor with assistance of a passivation layer.  Netherlands.  https://doi.org/10.1016/j.sbsr.2015.07.009

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                    Chang, Jingbo, Zhou, Guihua, Gao, Xianfeng, Mao, Shun, Cui, Shumao, Ocola, Leonidas E., Yuan, Chris, and Chen, Junhong. Tue .  
"Real-time detection of mercury ions in water using a reduced graphene oxide/DNA field-effect transistor with assistance of a passivation layer".  Netherlands.  https://doi.org/10.1016/j.sbsr.2015.07.009.

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@article{osti_1209988,

  title        = {Real-time detection of mercury ions in water using a reduced graphene oxide/DNA field-effect transistor with assistance of a passivation layer},

  author       = {Chang, Jingbo and Zhou, Guihua and Gao, Xianfeng and Mao, Shun and Cui, Shumao and Ocola, Leonidas E. and Yuan, Chris and Chen, Junhong},

  abstractNote = {Field-effect transistor (FET) sensors based on reduced graphene oxide (rGO) for detecting chemical species provide a number of distinct advantages, such as ultrasensitivity, label-free, and real-time response. However, without a passivation layer, channel materials directly exposed to an ionic solution could generate multiple signals from ionic conduction through the solution droplet, doping effect, and gating effect. Therefore, a method that provides a passivation layer on the surface of rGO without degrading device performance will significantly improve device sensitivity, in which the conductivity changes solely with the gating effect. In this work, we report rGO FET sensor devices with Hg2+-dependent DNA as a probe and the use of an Al2O3 layer to separate analytes from conducting channel materials. The device shows good electronic stability, excellent lower detection limit (1 nM), and high sensitivity for real-time detection of Hg2+ in an underwater environment. Our work shows that optimization of an rGO FET structure can provide significant performance enhancement and profound fundamental understanding for the sensor mechanism.},

  doi          = {10.1016/j.sbsr.2015.07.009},

  journal      = {Sensing and Bio-Sensing Research},

  number       = C,

  volume       = 5,

  place        = {Netherlands},

  year         = {Tue Sep 01 00:00:00 EDT 2015},

  month        = {Tue Sep 01 00:00:00 EDT 2015}

}

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