CdTe quantum dots and polymer nanocomposites for x-ray scintillation and imaging

被引：79

作者：

Kang, Zhitao ^{[1
]}

Zhang, Yuelan ^{[2
]}

Menkara, Hisham ^{[2
]}

Wagner, Brent K. ^{[1
]}

Summers, Christopher J. ^{[2
]}

Lawrence, William ^{[3
]}

Nagarkar, Vivek ^{[3
]}

机构：

[1] Georgia Inst Technol, Georgia Tech Res Inst, Phosphor Technol Ctr Excellence, Atlanta, GA 30332 USA

[2] PhosphorTech Corp, Lithia Springs, GA 30122 USA

[3] Radiat Monitoring Devices Inc, Watertown, MA 02472 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 18期

关键词：

RADIATION DETECTION; EFFICIENCY; NANOCRYSTALS;

D O I：

10.1063/1.3589366

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Investigations are reported on the x-ray scintillation and imaging application of CdTe quantum dots (QDs) and their polymer nanocomposites. Aqueous CdTe QDs with emissions ranging between 510 and 680 nm were prepared and incorporated into polyvinyl alcohol or polymethyl methacrylate polymer matrices. The x-ray luminescent properties were evaluated and a resolution of 5 lines/mm was obtained from the nanocomposite films. Additionally, the fast decay time, nonafterglow, and superior spectral match to conventional charge coupled devices, show that CdTe QD nanocomposites have high promise for x-ray imaging applications. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3589366]

引用

页数：3

共 12 条

[1]

[Anonymous], 1999, PHOSPHOR HDB

[2] The complete atomic structure of the large ribosomal subunit at 2.4 Å resolution [J].

Ban, N ;

Nissen, P ;

Hansen, J ;

Moore, PB ;

Steitz, TA .

SCIENCE, 2000, 289 (5481) :905-920

[3] Quantum-dot/organic semiconductor composites for radiation detection [J].

Campbell, IH ;

Crone, BK .

ADVANCED MATERIALS, 2006, 18 (01) :77-79

[4] Challenges facing structural biology beamlines [J].

Ealick, SE .

NATURE STRUCTURAL BIOLOGY, 1998, 5 (Suppl 8) :620-623

[5] CATHODOLUMINESCENCE EFFICIENCY OF BINARY COMPOUND PHOSPHORS [J].

INOUE, M .

JOURNAL OF APPLIED PHYSICS, 1984, 55 (06) :1558-1565

[6] Semiconductor quantum dot scintillation under γ-ray irradiation [J].

Letant, S. E. ;

Wang, T. -F. .

NANO LETTERS, 2006, 6 (12) :2877-2880

[7] Nanocomposite scintillators for radiation detection and nuclear spectroscopy [J].

McKigney, Edward A. ;

Del Sesto, Rico E. ;

Jacobsohn, Luiz G. ;

Santi, Peter A. ;

Muenchausen, Ross E. ;

Ott, Kevin C. ;

McCleskey, T. Mark ;

Bennett, Bryan L. ;

Smith, James F. ;

Cooke, D. Wayne .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2007, 579 (01) :15-18

[8] Radiation detector materials: An overview [J].

Milbrath, B. D. ;

Peurrung, A. J. ;

Bliss, M. ;

Weber, W. J. .

JOURNAL OF MATERIALS RESEARCH, 2008, 23 (10) :2561-2581

[9] Seven excitons at a cost of one: Redefining the limits for conversion efficiency of photons into charge carriers [J].

Schaller, RD ;

Sykora, M ;

Pietryga, JM ;

Klimov, VI .

NANO LETTERS, 2006, 6 (03) :424-429

[10] Effect of electronic structure on carrier multiplication efficiency: Comparative study of PbSe and CdSe nanocrystals [J].

Schaller, RD ;

Petruska, MA ;

Klimov, VI .

APPLIED PHYSICS LETTERS, 2005, 87 (25) :1-3

← 1 2 →