Tailoring the selectivity of chemical sensors based on graphene decorated with metal nanoparticles

Here, we present the effect of the graphene decoration with palladium nanoparticles (NPs) on the sensor sensitivity. A key aspect of this work is the method used for the decoration, that is made directly on pristine graphene obtained by the exfoliation of natural graphite in eco-friendly solvents at room temperature; the subsequent microwave treatment supplies the energy needed for the reduction of the palladium salt into palladium nanoparticles (PdNPs), which directly stick onto the pristine graphene surface. The PdNPs decoration results in a great improvement of the device response towards hydrogen, by definitively turning the high sensitivity versus nitrogen dioxide of the pristine material.

[1]  G. Ramanath,et al.  Microwave-Assisted Single-Step Functionalization and in situ Derivatization of Carbon Nanotubes with Gold Nanoparticles. , 2006 .

[2]  E. Massera,et al.  Graphene-based Schottky Device Detecting NH3 at ppm level in Environmental Conditions , 2014 .

[3]  Ahalapitiya H. Jayatissa,et al.  Ammonia gas sensing behavior of graphene surface decorated with gold nanoparticles , 2012 .

[4]  He HongKun,et al.  Graphene nanosheets decorated with Pd, Pt, Au, and Ag nanoparticles: Synthesis, characterization, and catalysis applications , 2011 .

[5]  Filip Braet,et al.  Toward ubiquitous environmental gas sensors-capitalizing on the promise of graphene. , 2010, Environmental science & technology.

[6]  M. Otyepka,et al.  Functionalization of graphene: covalent and non-covalent approaches, derivatives and applications. , 2012, Chemical reviews.

[7]  Thomas Hirsch,et al.  Hydrogen sensor based on a graphene - palladium nanocomposite , 2011 .

[8]  Jin Suk Chung,et al.  Reduced graphene oxide as an over-coating layer on silver nanostructures for detecting NH3 gas at room temperature , 2014 .

[9]  Ettore Massera,et al.  A calibrated graphene-based chemi-sensor for sub parts-per-million NO2 detection operating at room temperature , 2014 .

[10]  I. Lundström,et al.  Chemical reactions on palladium surfaces studied with Pd-MOS structures , 1977 .

[11]  Stephen J. Pearton,et al.  Hydrogen detection using platinum coated graphene grown on SiC , 2011 .

[12]  Hongkun He,et al.  Graphene nanosheets decorated with Pd, Pt, Au, and Ag nanoparticles: Synthesis, characterization, and catalysis applications , 2011 .

[13]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[14]  C. Rao,et al.  A study of graphene decorated with metal nanoparticles , 2010 .

[15]  Guoliang Zhang,et al.  Gold nanoparticles–graphene hybrids as active catalysts for Suzuki reaction , 2010 .

[16]  Xin Wang,et al.  Graphene−Metal Particle Nanocomposites , 2008 .

[17]  J. Robertson,et al.  Interpretation of Raman spectra of disordered and amorphous carbon , 2000 .

[18]  Adarsh Kaniyoor,et al.  Nanostructured Pt decorated graphene and multi walled carbon nanotube based room temperature hydrogen gas sensor. , 2009, Nanoscale.

[19]  T. Paronyan,et al.  Sub-ppt gas detection with pristine graphene , 2012 .

[20]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[21]  Junhong Chen,et al.  Controllable synthesis of silver nanoparticle-decorated reduced graphene oxide hybrids for ammonia detection. , 2013, The Analyst.

[22]  K. Novoselov,et al.  Detection of individual gas molecules adsorbed on graphene. , 2006, Nature materials.

[23]  Nikhil Koratkar,et al.  High sensitivity detection of NO2 and NH3 in air using chemical vapor deposition grown graphene , 2012 .

[24]  G. Shi,et al.  Graphene-based gas sensors , 2013 .