Nanoparticles: Strained and Stiff | RDL Research Database

Abstract

Nanoparticles may contain unusual forms of structural disorder that can substantially modify materials properties and thus cannot solely be considered as small pieces of bulk material. We have developed a method to quantify intermediate-range order in 3.4-nanometer-diameter zinc sulfide nanoparticles and show that structural coherence is lost over distances beyond 2nanometers. The zinc-sulfur Einstein vibration frequency in the nanoparticles is substantially higher than that in the bulk zinc sulfide, implying structural stiffening. This cannot be explained by the observed 1% radial compression and must be primarily due to inhomogeneous internal strain caused by competing relaxations from an irregular surface. The methods developed here are generally applicable to the characterization of nanoscale solids, many of which may exhibit complex disorder and strain.

Keywords

NanoparticleMaterials scienceZincNanoscopic scaleStiffeningNanometreChemical physicsNanotechnologySulfideZinc sulfideSulfurCharacterization (materials science)Composite materialChemistryMetallurgy

Affiliated Institutions

Lawrence Berkeley National Laboratory US

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Publication Info

Year: 2004
Type: article
Volume: 305
Issue: 5684
Pages: 651-654
Citations: 465
Access: Closed

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APA Style

                            
                                
                                    Benjamin Gilbert, 
                                
                                    Feng Huang, 
                                
                                    Hengzhong Zhang
                                
                                et al.
                            
                            (2004). 
                            Nanoparticles: Strained and Stiff. 
                            Science
                            , 305
                            (5684)
                            , 651-654.
                            https://doi.org/10.1126/science.1098454
                        

Identifiers

DOI: 10.1126/science.1098454